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TOMOYO Linux Cross Reference
Linux/Makefile

Version: ~ [ linux-6.12-rc7 ] ~ [ linux-6.11.7 ] ~ [ linux-6.10.14 ] ~ [ linux-6.9.12 ] ~ [ linux-6.8.12 ] ~ [ linux-6.7.12 ] ~ [ linux-6.6.60 ] ~ [ linux-6.5.13 ] ~ [ linux-6.4.16 ] ~ [ linux-6.3.13 ] ~ [ linux-6.2.16 ] ~ [ linux-6.1.116 ] ~ [ linux-6.0.19 ] ~ [ linux-5.19.17 ] ~ [ linux-5.18.19 ] ~ [ linux-5.17.15 ] ~ [ linux-5.16.20 ] ~ [ linux-5.15.171 ] ~ [ linux-5.14.21 ] ~ [ linux-5.13.19 ] ~ [ linux-5.12.19 ] ~ [ linux-5.11.22 ] ~ [ linux-5.10.229 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.285 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.323 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.336 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.337 ] ~ [ linux-4.4.302 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.12 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

Diff markup

Differences between /Makefile (Version linux-6.12-rc7) and /Makefile (Version linux-5.5.19)


  1 # SPDX-License-Identifier: GPL-2.0                  1 # SPDX-License-Identifier: GPL-2.0
  2 VERSION = 6                                    !!   2 VERSION = 5
  3 PATCHLEVEL = 12                                !!   3 PATCHLEVEL = 5
  4 SUBLEVEL = 0                                   !!   4 SUBLEVEL = 19
  5 EXTRAVERSION = -rc7                            !!   5 EXTRAVERSION =
  6 NAME = Baby Opossum Posse                      !!   6 NAME = Kleptomaniac Octopus
  7                                                     7 
  8 # *DOCUMENTATION*                                   8 # *DOCUMENTATION*
  9 # To see a list of typical targets execute "ma      9 # To see a list of typical targets execute "make help"
 10 # More info can be located in ./README             10 # More info can be located in ./README
 11 # Comments in this file are targeted only to t     11 # Comments in this file are targeted only to the developer, do not
 12 # expect to learn how to build the kernel read     12 # expect to learn how to build the kernel reading this file.
 13                                                    13 
 14 ifeq ($(filter output-sync,$(.FEATURES)),)     << 
 15 $(error GNU Make >= 4.0 is required. Your Make << 
 16 endif                                          << 
 17                                                << 
 18 $(if $(filter __%, $(MAKECMDGOALS)), \         << 
 19         $(error targets prefixed with '__' are << 
 20                                                << 
 21 # That's our default target when none is given     14 # That's our default target when none is given on the command line
 22 PHONY := __all                                 !!  15 PHONY := _all
 23 __all:                                         !!  16 _all:
 24                                                    17 
 25 # We are using a recursive build, so we need t     18 # We are using a recursive build, so we need to do a little thinking
 26 # to get the ordering right.                       19 # to get the ordering right.
 27 #                                                  20 #
 28 # Most importantly: sub-Makefiles should only      21 # Most importantly: sub-Makefiles should only ever modify files in
 29 # their own directory. If in some directory we     22 # their own directory. If in some directory we have a dependency on
 30 # a file in another dir (which doesn't happen      23 # a file in another dir (which doesn't happen often, but it's often
 31 # unavoidable when linking the built-in.a targ     24 # unavoidable when linking the built-in.a targets which finally
 32 # turn into vmlinux), we will call a sub make      25 # turn into vmlinux), we will call a sub make in that other dir, and
 33 # after that we are sure that everything which     26 # after that we are sure that everything which is in that other dir
 34 # is now up to date.                               27 # is now up to date.
 35 #                                                  28 #
 36 # The only cases where we need to modify files     29 # The only cases where we need to modify files which have global
 37 # effects are thus separated out and done befo     30 # effects are thus separated out and done before the recursive
 38 # descending is started. They are now explicit     31 # descending is started. They are now explicitly listed as the
 39 # prepare rule.                                    32 # prepare rule.
 40                                                    33 
 41 this-makefile := $(lastword $(MAKEFILE_LIST))  << 
 42 abs_srctree := $(realpath $(dir $(this-makefil << 
 43 abs_objtree := $(CURDIR)                       << 
 44                                                << 
 45 ifneq ($(sub_make_done),1)                         34 ifneq ($(sub_make_done),1)
 46                                                    35 
 47 # Do not use make's built-in rules and variabl     36 # Do not use make's built-in rules and variables
 48 # (this increases performance and avoids hard-     37 # (this increases performance and avoids hard-to-debug behaviour)
 49 MAKEFLAGS += -rR                                   38 MAKEFLAGS += -rR
 50                                                    39 
 51 # Avoid funny character set dependencies           40 # Avoid funny character set dependencies
 52 unexport LC_ALL                                    41 unexport LC_ALL
 53 LC_COLLATE=C                                       42 LC_COLLATE=C
 54 LC_NUMERIC=C                                       43 LC_NUMERIC=C
 55 export LC_COLLATE LC_NUMERIC                       44 export LC_COLLATE LC_NUMERIC
 56                                                    45 
 57 # Avoid interference with shell env settings       46 # Avoid interference with shell env settings
 58 unexport GREP_OPTIONS                              47 unexport GREP_OPTIONS
 59                                                    48 
 60 # Beautify output                                  49 # Beautify output
 61 # --------------------------------------------     50 # ---------------------------------------------------------------------------
 62 #                                                  51 #
 63 # Most of build commands in Kbuild start with  !!  52 # Normally, we echo the whole command before executing it. By making
 64 # "quiet_cmd_*". If defined, the short log is  !!  53 # that echo $($(quiet)$(cmd)), we now have the possibility to set
 65 # that command is printed by default.          !!  54 # $(quiet) to choose other forms of output instead, e.g.
 66 #                                              !!  55 #
 67 # e.g.)                                        !!  56 #         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
 68 #    quiet_cmd_depmod = DEPMOD  $(MODLIB)      !!  57 #         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
 69 #          cmd_depmod = $(srctree)/scripts/dep !!  58 #
                                                   >>  59 # If $(quiet) is empty, the whole command will be printed.
                                                   >>  60 # If it is set to "quiet_", only the short version will be printed.
                                                   >>  61 # If it is set to "silent_", nothing will be printed at all, since
                                                   >>  62 # the variable $(silent_cmd_cc_o_c) doesn't exist.
 70 #                                                  63 #
 71 # A simple variant is to prefix commands with      64 # A simple variant is to prefix commands with $(Q) - that's useful
 72 # for commands that shall be hidden in non-ver     65 # for commands that shall be hidden in non-verbose mode.
 73 #                                                  66 #
 74 #    $(Q)$(MAKE) $(build)=scripts/basic        !!  67 #       $(Q)ln $@ :<
 75 #                                                  68 #
 76 # If KBUILD_VERBOSE contains 1, the whole comm !!  69 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
 77 # If KBUILD_VERBOSE contains 2, the reason for !!  70 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
 78 #                                                  71 #
 79 # To put more focus on warnings, be less verbo     72 # To put more focus on warnings, be less verbose as default
 80 # Use 'make V=1' to see the full commands          73 # Use 'make V=1' to see the full commands
 81                                                    74 
 82 ifeq ("$(origin V)", "command line")               75 ifeq ("$(origin V)", "command line")
 83   KBUILD_VERBOSE = $(V)                            76   KBUILD_VERBOSE = $(V)
 84 endif                                              77 endif
                                                   >>  78 ifndef KBUILD_VERBOSE
                                                   >>  79   KBUILD_VERBOSE = 0
                                                   >>  80 endif
 85                                                    81 
 86 quiet = quiet_                                 !!  82 ifeq ($(KBUILD_VERBOSE),1)
 87 Q = @                                          << 
 88                                                << 
 89 ifneq ($(findstring 1, $(KBUILD_VERBOSE)),)    << 
 90   quiet =                                          83   quiet =
 91   Q =                                              84   Q =
                                                   >>  85 else
                                                   >>  86   quiet=quiet_
                                                   >>  87   Q = @
 92 endif                                              88 endif
 93                                                    89 
 94 # If the user is running make -s (silent mode)     90 # If the user is running make -s (silent mode), suppress echoing of
 95 # commands                                         91 # commands
 96 ifneq ($(findstring s,$(firstword -$(MAKEFLAGS << 
 97 quiet=silent_                                  << 
 98 override KBUILD_VERBOSE :=                     << 
 99 endif                                          << 
100                                                << 
101 export quiet Q KBUILD_VERBOSE                  << 
102                                                    92 
103 # Call a source code checker (by default, "spa !!  93 ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),)
104 # C compilation.                               !!  94   quiet=silent_
105 #                                              << 
106 # Use 'make C=1' to enable checking of only re << 
107 # Use 'make C=2' to enable checking of *all* s << 
108 # of whether they are re-compiled or not.      << 
109 #                                              << 
110 # See the file "Documentation/dev-tools/sparse << 
111 # including where to get the "sparse" utility. << 
112                                                << 
113 ifeq ("$(origin C)", "command line")           << 
114   KBUILD_CHECKSRC = $(C)                       << 
115 endif                                          << 
116 ifndef KBUILD_CHECKSRC                         << 
117   KBUILD_CHECKSRC = 0                          << 
118 endif                                          << 
119                                                << 
120 export KBUILD_CHECKSRC                         << 
121                                                << 
122 # Enable "clippy" (a linter) as part of the Ru << 
123 #                                              << 
124 # Use 'make CLIPPY=1' to enable it.            << 
125 ifeq ("$(origin CLIPPY)", "command line")      << 
126   KBUILD_CLIPPY := $(CLIPPY)                   << 
127 endif                                          << 
128                                                << 
129 export KBUILD_CLIPPY                           << 
130                                                << 
131 # Use make M=dir or set the environment variab << 
132 # directory of external module to build. Setti << 
133 ifeq ("$(origin M)", "command line")           << 
134   KBUILD_EXTMOD := $(M)                        << 
135 endif                                              95 endif
136                                                    96 
137 $(if $(word 2, $(KBUILD_EXTMOD)), \            !!  97 export quiet Q KBUILD_VERBOSE
138         $(error building multiple external mod << 
139                                                << 
140 $(foreach x, % :, $(if $(findstring $x, $(KBUI << 
141         $(error module directory path cannot c << 
142                                                << 
143 # Remove trailing slashes                      << 
144 ifneq ($(filter %/, $(KBUILD_EXTMOD)),)        << 
145 KBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTM << 
146 endif                                          << 
147                                                << 
148 export KBUILD_EXTMOD                           << 
149                                                << 
150 # backward compatibility                       << 
151 KBUILD_EXTRA_WARN ?= $(KBUILD_ENABLE_EXTRA_GCC << 
152                                                << 
153 ifeq ("$(origin W)", "command line")           << 
154   KBUILD_EXTRA_WARN := $(W)                    << 
155 endif                                          << 
156                                                << 
157 export KBUILD_EXTRA_WARN                       << 
158                                                    98 
159 # Kbuild will save output files in the current     99 # Kbuild will save output files in the current working directory.
160 # This does not need to match to the root of t    100 # This does not need to match to the root of the kernel source tree.
161 #                                                 101 #
162 # For example, you can do this:                   102 # For example, you can do this:
163 #                                                 103 #
164 #  cd /dir/to/store/output/files; make -f /dir    104 #  cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile
165 #                                                 105 #
166 # If you want to save output files in a differ    106 # If you want to save output files in a different location, there are
167 # two syntaxes to specify it.                     107 # two syntaxes to specify it.
168 #                                                 108 #
169 # 1) O=                                           109 # 1) O=
170 # Use "make O=dir/to/store/output/files/"         110 # Use "make O=dir/to/store/output/files/"
171 #                                                 111 #
172 # 2) Set KBUILD_OUTPUT                            112 # 2) Set KBUILD_OUTPUT
173 # Set the environment variable KBUILD_OUTPUT t    113 # Set the environment variable KBUILD_OUTPUT to point to the output directory.
174 # export KBUILD_OUTPUT=dir/to/store/output/fil    114 # export KBUILD_OUTPUT=dir/to/store/output/files/; make
175 #                                                 115 #
176 # The O= assignment takes precedence over the     116 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
177 # variable.                                       117 # variable.
178                                                   118 
179 # Do we want to change the working directory?     119 # Do we want to change the working directory?
180 ifeq ("$(origin O)", "command line")              120 ifeq ("$(origin O)", "command line")
181   KBUILD_OUTPUT := $(O)                           121   KBUILD_OUTPUT := $(O)
182 endif                                             122 endif
183                                                   123 
184 ifneq ($(KBUILD_OUTPUT),)                         124 ifneq ($(KBUILD_OUTPUT),)
185 # $(realpath ...) gets empty if the path does  !! 125 # Make's built-in functions such as $(abspath ...), $(realpath ...) cannot
186 $(shell mkdir -p "$(KBUILD_OUTPUT)")           !! 126 # expand a shell special character '~'. We use a somewhat tedious way here.
                                                   >> 127 abs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd)
                                                   >> 128 $(if $(abs_objtree),, \
                                                   >> 129      $(error failed to create output directory "$(KBUILD_OUTPUT)"))
                                                   >> 130 
187 # $(realpath ...) resolves symlinks               131 # $(realpath ...) resolves symlinks
188 abs_objtree := $(realpath $(KBUILD_OUTPUT))    !! 132 abs_objtree := $(realpath $(abs_objtree))
189 $(if $(abs_objtree),,$(error failed to create  !! 133 else
                                                   >> 134 abs_objtree := $(CURDIR)
190 endif # ifneq ($(KBUILD_OUTPUT),)                 135 endif # ifneq ($(KBUILD_OUTPUT),)
191                                                   136 
192 ifneq ($(words $(subst :, ,$(abs_srctree))), 1 !! 137 ifeq ($(abs_objtree),$(CURDIR))
193 $(error source directory cannot contain spaces !! 138 # Suppress "Entering directory ..." unless we are changing the work directory.
                                                   >> 139 MAKEFLAGS += --no-print-directory
                                                   >> 140 else
                                                   >> 141 need-sub-make := 1
194 endif                                             142 endif
195                                                   143 
196 export sub_make_done := 1                      !! 144 abs_srctree := $(realpath $(dir $(lastword $(MAKEFILE_LIST))))
197                                                   145 
198 endif # sub_make_done                          !! 146 ifneq ($(words $(subst :, ,$(abs_srctree))), 1)
                                                   >> 147 $(error source directory cannot contain spaces or colons)
                                                   >> 148 endif
199                                                   149 
200 ifeq ($(abs_objtree),$(CURDIR))                !! 150 ifneq ($(abs_srctree),$(abs_objtree))
201 # Suppress "Entering directory ..." if we are  !! 151 # Look for make include files relative to root of kernel src
202 no-print-directory := --no-print-directory     !! 152 #
203 else                                           !! 153 # This does not become effective immediately because MAKEFLAGS is re-parsed
204 # Recursion to show "Entering directory ..."   !! 154 # once after the Makefile is read. We need to invoke sub-make.
                                                   >> 155 MAKEFLAGS += --include-dir=$(abs_srctree)
205 need-sub-make := 1                                156 need-sub-make := 1
206 endif                                             157 endif
207                                                   158 
208 ifeq ($(filter --no-print-directory, $(MAKEFLA !! 159 ifneq ($(filter 3.%,$(MAKE_VERSION)),)
209 # If --no-print-directory is unset, recurse on !! 160 # 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x
210 # You may end up recursing into __sub-make twi !! 161 # We need to invoke sub-make to avoid implicit rules in the top Makefile.
211 # behavior change in GNU Make 4.4.1.           << 
212 need-sub-make := 1                                162 need-sub-make := 1
                                                   >> 163 # Cancel implicit rules for this Makefile.
                                                   >> 164 $(lastword $(MAKEFILE_LIST)): ;
213 endif                                             165 endif
214                                                   166 
                                                   >> 167 export abs_srctree abs_objtree
                                                   >> 168 export sub_make_done := 1
                                                   >> 169 
215 ifeq ($(need-sub-make),1)                         170 ifeq ($(need-sub-make),1)
216                                                   171 
217 PHONY += $(MAKECMDGOALS) __sub-make            !! 172 PHONY += $(MAKECMDGOALS) sub-make
218                                                   173 
219 $(filter-out $(this-makefile), $(MAKECMDGOALS) !! 174 $(filter-out _all sub-make $(lastword $(MAKEFILE_LIST)), $(MAKECMDGOALS)) _all: sub-make
220         @:                                        175         @:
221                                                   176 
222 # Invoke a second make in the output directory    177 # Invoke a second make in the output directory, passing relevant variables
223 __sub-make:                                    !! 178 sub-make:
224         $(Q)$(MAKE) $(no-print-directory) -C $ !! 179         $(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS)
225         -f $(abs_srctree)/Makefile $(MAKECMDGO << 
226                                                   180 
227 else # need-sub-make                           !! 181 endif # need-sub-make
                                                   >> 182 endif # sub_make_done
228                                                   183 
229 # We process the rest of the Makefile if this     184 # We process the rest of the Makefile if this is the final invocation of make
                                                   >> 185 ifeq ($(need-sub-make),)
                                                   >> 186 
                                                   >> 187 # Do not print "Entering directory ...",
                                                   >> 188 # but we want to display it when entering to the output directory
                                                   >> 189 # so that IDEs/editors are able to understand relative filenames.
                                                   >> 190 MAKEFLAGS += --no-print-directory
                                                   >> 191 
                                                   >> 192 # Call a source code checker (by default, "sparse") as part of the
                                                   >> 193 # C compilation.
                                                   >> 194 #
                                                   >> 195 # Use 'make C=1' to enable checking of only re-compiled files.
                                                   >> 196 # Use 'make C=2' to enable checking of *all* source files, regardless
                                                   >> 197 # of whether they are re-compiled or not.
                                                   >> 198 #
                                                   >> 199 # See the file "Documentation/dev-tools/sparse.rst" for more details,
                                                   >> 200 # including where to get the "sparse" utility.
                                                   >> 201 
                                                   >> 202 ifeq ("$(origin C)", "command line")
                                                   >> 203   KBUILD_CHECKSRC = $(C)
                                                   >> 204 endif
                                                   >> 205 ifndef KBUILD_CHECKSRC
                                                   >> 206   KBUILD_CHECKSRC = 0
                                                   >> 207 endif
                                                   >> 208 
                                                   >> 209 # Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the
                                                   >> 210 # directory of external module to build. Setting M= takes precedence.
                                                   >> 211 ifeq ("$(origin M)", "command line")
                                                   >> 212   KBUILD_EXTMOD := $(M)
                                                   >> 213 endif
                                                   >> 214 
                                                   >> 215 export KBUILD_CHECKSRC KBUILD_EXTMOD
                                                   >> 216 
                                                   >> 217 extmod-prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/)
230                                                   218 
231 ifeq ($(abs_srctree),$(abs_objtree))              219 ifeq ($(abs_srctree),$(abs_objtree))
232         # building in the source tree             220         # building in the source tree
233         srctree := .                              221         srctree := .
234         building_out_of_srctree :=                222         building_out_of_srctree :=
235 else                                              223 else
236         ifeq ($(abs_srctree)/,$(dir $(abs_objt    224         ifeq ($(abs_srctree)/,$(dir $(abs_objtree)))
237                 # building in a subdirectory o    225                 # building in a subdirectory of the source tree
238                 srctree := ..                     226                 srctree := ..
239         else                                      227         else
240                 srctree := $(abs_srctree)         228                 srctree := $(abs_srctree)
241         endif                                     229         endif
242         building_out_of_srctree := 1              230         building_out_of_srctree := 1
243 endif                                             231 endif
244                                                   232 
245 ifneq ($(KBUILD_ABS_SRCTREE),)                    233 ifneq ($(KBUILD_ABS_SRCTREE),)
246 srctree := $(abs_srctree)                         234 srctree := $(abs_srctree)
247 endif                                             235 endif
248                                                   236 
249 objtree         := .                              237 objtree         := .
250                                                << 
251 VPATH           :=                             << 
252                                                << 
253 ifeq ($(KBUILD_EXTMOD),)                       << 
254 ifdef building_out_of_srctree                  << 
255 VPATH           := $(srctree)                     238 VPATH           := $(srctree)
256 endif                                          << 
257 endif                                          << 
258                                                   239 
259 export building_out_of_srctree srctree objtree    240 export building_out_of_srctree srctree objtree VPATH
260                                                   241 
261 # To make sure we do not include .config for a    242 # To make sure we do not include .config for any of the *config targets
262 # catch them early, and hand them over to scri    243 # catch them early, and hand them over to scripts/kconfig/Makefile
263 # It is allowed to specify more targets when c    244 # It is allowed to specify more targets when calling make, including
264 # mixing *config targets and build targets.       245 # mixing *config targets and build targets.
265 # For example 'make oldconfig all'.               246 # For example 'make oldconfig all'.
266 # Detect when mixed targets is specified, and     247 # Detect when mixed targets is specified, and make a second invocation
267 # of make so .config is not included in this c    248 # of make so .config is not included in this case either (for *config).
268                                                   249 
269 version_h := include/generated/uapi/linux/vers    250 version_h := include/generated/uapi/linux/version.h
                                                   >> 251 old_version_h := include/linux/version.h
270                                                   252 
271 clean-targets := %clean mrproper cleandocs        253 clean-targets := %clean mrproper cleandocs
272 no-dot-config-targets := $(clean-targets) \       254 no-dot-config-targets := $(clean-targets) \
273                          cscope gtags TAGS tag    255                          cscope gtags TAGS tags help% %docs check% coccicheck \
274                          $(version_h) headers     256                          $(version_h) headers headers_% archheaders archscripts \
275                          %asm-generic kernelve !! 257                          %asm-generic kernelversion %src-pkg
276                          outputmakefile rustav !! 258 no-sync-config-targets := $(no-dot-config-targets) install %install \
277 no-sync-config-targets := $(no-dot-config-targ !! 259                            kernelrelease
278                           image_name           !! 260 single-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/
279 single-targets := %.a %.i %.ko %.lds %.ll %.ls << 
280                                                   261 
281 config-build    :=                                262 config-build    :=
282 mixed-build     :=                                263 mixed-build     :=
283 need-config     := 1                              264 need-config     := 1
284 may-sync-config := 1                              265 may-sync-config := 1
285 single-build    :=                                266 single-build    :=
286                                                   267 
287 ifneq ($(filter $(no-dot-config-targets), $(MA    268 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
288     ifeq ($(filter-out $(no-dot-config-targets !! 269         ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
289         need-config :=                         !! 270                 need-config :=
290     endif                                      !! 271         endif
291 endif                                             272 endif
292                                                   273 
293 ifneq ($(filter $(no-sync-config-targets), $(M    274 ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),)
294     ifeq ($(filter-out $(no-sync-config-target !! 275         ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),)
295         may-sync-config :=                     !! 276                 may-sync-config :=
296     endif                                      !! 277         endif
297 endif                                             278 endif
298                                                   279 
299 need-compiler := $(may-sync-config)            << 
300                                                << 
301 ifneq ($(KBUILD_EXTMOD),)                         280 ifneq ($(KBUILD_EXTMOD),)
302     may-sync-config :=                         !! 281         may-sync-config :=
303 endif                                             282 endif
304                                                   283 
305 ifeq ($(KBUILD_EXTMOD),)                          284 ifeq ($(KBUILD_EXTMOD),)
306     ifneq ($(filter %config,$(MAKECMDGOALS)),) !! 285         ifneq ($(filter config %config,$(MAKECMDGOALS)),)
307         config-build := 1                      !! 286                 config-build := 1
308         ifneq ($(words $(MAKECMDGOALS)),1)     !! 287                 ifneq ($(words $(MAKECMDGOALS)),1)
309             mixed-build := 1                   !! 288                         mixed-build := 1
                                                   >> 289                 endif
310         endif                                     290         endif
311     endif                                      << 
312 endif                                             291 endif
313                                                   292 
314 # We cannot build single targets and the other    293 # We cannot build single targets and the others at the same time
315 ifneq ($(filter $(single-targets), $(MAKECMDGO    294 ifneq ($(filter $(single-targets), $(MAKECMDGOALS)),)
316     single-build := 1                          !! 295         single-build := 1
317     ifneq ($(filter-out $(single-targets), $(M !! 296         ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),)
318         mixed-build := 1                       !! 297                 mixed-build := 1
319     endif                                      !! 298         endif
320 endif                                             299 endif
321                                                   300 
322 # For "make -j clean all", "make -j mrproper d    301 # For "make -j clean all", "make -j mrproper defconfig all", etc.
323 ifneq ($(filter $(clean-targets),$(MAKECMDGOAL    302 ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),)
324     ifneq ($(filter-out $(clean-targets),$(MAK !! 303         ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),)
325         mixed-build := 1                       !! 304                 mixed-build := 1
326     endif                                      !! 305         endif
327 endif                                             306 endif
328                                                   307 
329 # install and modules_install need also be pro    308 # install and modules_install need also be processed one by one
330 ifneq ($(filter install,$(MAKECMDGOALS)),)        309 ifneq ($(filter install,$(MAKECMDGOALS)),)
331     ifneq ($(filter modules_install,$(MAKECMDG !! 310         ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
332         mixed-build := 1                       !! 311                 mixed-build := 1
333     endif                                      !! 312         endif
334 endif                                             313 endif
335                                                   314 
336 ifdef mixed-build                                 315 ifdef mixed-build
337 # ============================================    316 # ===========================================================================
338 # We're called with mixed targets (*config and    317 # We're called with mixed targets (*config and build targets).
339 # Handle them one by one.                         318 # Handle them one by one.
340                                                   319 
341 PHONY += $(MAKECMDGOALS) __build_one_by_one       320 PHONY += $(MAKECMDGOALS) __build_one_by_one
342                                                   321 
343 $(MAKECMDGOALS): __build_one_by_one            !! 322 $(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
344         @:                                        323         @:
345                                                   324 
346 __build_one_by_one:                               325 __build_one_by_one:
347         $(Q)set -e; \                             326         $(Q)set -e; \
348         for i in $(MAKECMDGOALS); do \            327         for i in $(MAKECMDGOALS); do \
349                 $(MAKE) -f $(srctree)/Makefile    328                 $(MAKE) -f $(srctree)/Makefile $$i; \
350         done                                      329         done
351                                                   330 
352 else # !mixed-build                               331 else # !mixed-build
353                                                   332 
354 include $(srctree)/scripts/Kbuild.include      !! 333 include scripts/Kbuild.include
355                                                   334 
356 # Read KERNELRELEASE from include/config/kerne    335 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
357 KERNELRELEASE = $(call read-file, include/conf !! 336 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
358 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.    337 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
359 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEA    338 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
360                                                   339 
361 include $(srctree)/scripts/subarch.include     !! 340 include scripts/subarch.include
362                                                   341 
363 # Cross compiling and selecting different set     342 # Cross compiling and selecting different set of gcc/bin-utils
364 # --------------------------------------------    343 # ---------------------------------------------------------------------------
365 #                                                 344 #
366 # When performing cross compilation for other     345 # When performing cross compilation for other architectures ARCH shall be set
367 # to the target architecture. (See arch/* for     346 # to the target architecture. (See arch/* for the possibilities).
368 # ARCH can be set during invocation of make:      347 # ARCH can be set during invocation of make:
369 # make ARCH=arm64                              !! 348 # make ARCH=ia64
370 # Another way is to have ARCH set in the envir    349 # Another way is to have ARCH set in the environment.
371 # The default ARCH is the host where make is e    350 # The default ARCH is the host where make is executed.
372                                                   351 
373 # CROSS_COMPILE specify the prefix used for al    352 # CROSS_COMPILE specify the prefix used for all executables used
374 # during compilation. Only gcc and related bin    353 # during compilation. Only gcc and related bin-utils executables
375 # are prefixed with $(CROSS_COMPILE).             354 # are prefixed with $(CROSS_COMPILE).
376 # CROSS_COMPILE can be set on the command line    355 # CROSS_COMPILE can be set on the command line
377 # make CROSS_COMPILE=aarch64-linux-gnu-        !! 356 # make CROSS_COMPILE=ia64-linux-
378 # Alternatively CROSS_COMPILE can be set in th    357 # Alternatively CROSS_COMPILE can be set in the environment.
379 # Default value for CROSS_COMPILE is not to pr    358 # Default value for CROSS_COMPILE is not to prefix executables
380 # Note: Some architectures assign CROSS_COMPIL    359 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
381 ARCH            ?= $(SUBARCH)                     360 ARCH            ?= $(SUBARCH)
382                                                   361 
383 # Architecture as present in compile.h            362 # Architecture as present in compile.h
384 UTS_MACHINE     := $(ARCH)                        363 UTS_MACHINE     := $(ARCH)
385 SRCARCH         := $(ARCH)                        364 SRCARCH         := $(ARCH)
386                                                   365 
387 # Additional ARCH settings for x86                366 # Additional ARCH settings for x86
388 ifeq ($(ARCH),i386)                               367 ifeq ($(ARCH),i386)
389         SRCARCH := x86                            368         SRCARCH := x86
390 endif                                             369 endif
391 ifeq ($(ARCH),x86_64)                             370 ifeq ($(ARCH),x86_64)
392         SRCARCH := x86                            371         SRCARCH := x86
393 endif                                             372 endif
394                                                   373 
395 # Additional ARCH settings for sparc              374 # Additional ARCH settings for sparc
396 ifeq ($(ARCH),sparc32)                            375 ifeq ($(ARCH),sparc32)
397        SRCARCH := sparc                           376        SRCARCH := sparc
398 endif                                             377 endif
399 ifeq ($(ARCH),sparc64)                            378 ifeq ($(ARCH),sparc64)
400        SRCARCH := sparc                           379        SRCARCH := sparc
401 endif                                             380 endif
402                                                   381 
403 # Additional ARCH settings for parisc          !! 382 # Additional ARCH settings for sh
404 ifeq ($(ARCH),parisc64)                        !! 383 ifeq ($(ARCH),sh64)
405        SRCARCH := parisc                       !! 384        SRCARCH := sh
406 endif                                          << 
407                                                << 
408 export cross_compiling :=                      << 
409 ifneq ($(SRCARCH),$(SUBARCH))                  << 
410 cross_compiling := 1                           << 
411 endif                                             385 endif
412                                                   386 
413 KCONFIG_CONFIG  ?= .config                        387 KCONFIG_CONFIG  ?= .config
414 export KCONFIG_CONFIG                             388 export KCONFIG_CONFIG
415                                                   389 
416 # SHELL used by kbuild                            390 # SHELL used by kbuild
417 CONFIG_SHELL := sh                                391 CONFIG_SHELL := sh
418                                                   392 
419 HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS     393 HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null)
420 HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAG    394 HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null)
421 HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/d    395 HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null)
422                                                   396 
423 ifneq ($(LLVM),)                               !! 397 HOSTCC       = gcc
424 ifneq ($(filter %/,$(LLVM)),)                  !! 398 HOSTCXX      = g++
425 LLVM_PREFIX := $(LLVM)                         !! 399 KBUILD_HOSTCFLAGS   := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \
426 else ifneq ($(filter -%,$(LLVM)),)             !! 400                 -fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS) \
427 LLVM_SUFFIX := $(LLVM)                         !! 401                 $(HOSTCFLAGS)
428 endif                                          !! 402 KBUILD_HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS)
429                                                << 
430 HOSTCC  = $(LLVM_PREFIX)clang$(LLVM_SUFFIX)    << 
431 HOSTCXX = $(LLVM_PREFIX)clang++$(LLVM_SUFFIX)  << 
432 else                                           << 
433 HOSTCC  = gcc                                  << 
434 HOSTCXX = g++                                  << 
435 endif                                          << 
436 HOSTRUSTC = rustc                              << 
437 HOSTPKG_CONFIG  = pkg-config                   << 
438                                                << 
439 KBUILD_USERHOSTCFLAGS := -Wall -Wmissing-proto << 
440                          -O2 -fomit-frame-poin << 
441 KBUILD_USERCFLAGS  := $(KBUILD_USERHOSTCFLAGS) << 
442 KBUILD_USERLDFLAGS := $(USERLDFLAGS)           << 
443                                                << 
444 # These flags apply to all Rust code in the tr << 
445 # host programs.                               << 
446 export rust_common_flags := --edition=2021 \   << 
447                             -Zbinary_dep_depin << 
448                             -Astable_features  << 
449                             -Dunsafe_op_in_uns << 
450                             -Dnon_ascii_idents << 
451                             -Wrust_2018_idioms << 
452                             -Wunreachable_pub  << 
453                             -Wmissing_docs \   << 
454                             -Wrustdoc::missing << 
455                             -Wclippy::all \    << 
456                             -Wclippy::mut_mut  << 
457                             -Wclippy::needless << 
458                             -Wclippy::needless << 
459                             -Wclippy::no_mangl << 
460                             -Wclippy::dbg_macr << 
461                                                << 
462 KBUILD_HOSTCFLAGS   := $(KBUILD_USERHOSTCFLAGS << 
463                        $(HOSTCFLAGS) -I $(srct << 
464 KBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CF << 
465                        -I $(srctree)/scripts/i << 
466 KBUILD_HOSTRUSTFLAGS := $(rust_common_flags) - << 
467                         -Zallow-features= $(HO << 
468 KBUILD_HOSTLDFLAGS  := $(HOST_LFS_LDFLAGS) $(H    403 KBUILD_HOSTLDFLAGS  := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS)
469 KBUILD_HOSTLDLIBS   := $(HOST_LFS_LIBS) $(HOST    404 KBUILD_HOSTLDLIBS   := $(HOST_LFS_LIBS) $(HOSTLDLIBS)
470                                                   405 
471 # Make variables (CC, etc...)                     406 # Make variables (CC, etc...)
472 CPP             = $(CC) -E                     !! 407 AS              = $(CROSS_COMPILE)as
473 ifneq ($(LLVM),)                               << 
474 CC              = $(LLVM_PREFIX)clang$(LLVM_SU << 
475 LD              = $(LLVM_PREFIX)ld.lld$(LLVM_S << 
476 AR              = $(LLVM_PREFIX)llvm-ar$(LLVM_ << 
477 NM              = $(LLVM_PREFIX)llvm-nm$(LLVM_ << 
478 OBJCOPY         = $(LLVM_PREFIX)llvm-objcopy$( << 
479 OBJDUMP         = $(LLVM_PREFIX)llvm-objdump$( << 
480 READELF         = $(LLVM_PREFIX)llvm-readelf$( << 
481 STRIP           = $(LLVM_PREFIX)llvm-strip$(LL << 
482 else                                           << 
483 CC              = $(CROSS_COMPILE)gcc          << 
484 LD              = $(CROSS_COMPILE)ld              408 LD              = $(CROSS_COMPILE)ld
                                                   >> 409 CC              = $(CROSS_COMPILE)gcc
                                                   >> 410 CPP             = $(CC) -E
485 AR              = $(CROSS_COMPILE)ar              411 AR              = $(CROSS_COMPILE)ar
486 NM              = $(CROSS_COMPILE)nm              412 NM              = $(CROSS_COMPILE)nm
                                                   >> 413 STRIP           = $(CROSS_COMPILE)strip
487 OBJCOPY         = $(CROSS_COMPILE)objcopy         414 OBJCOPY         = $(CROSS_COMPILE)objcopy
488 OBJDUMP         = $(CROSS_COMPILE)objdump         415 OBJDUMP         = $(CROSS_COMPILE)objdump
                                                   >> 416 OBJSIZE         = $(CROSS_COMPILE)size
489 READELF         = $(CROSS_COMPILE)readelf         417 READELF         = $(CROSS_COMPILE)readelf
490 STRIP           = $(CROSS_COMPILE)strip        << 
491 endif                                          << 
492 RUSTC           = rustc                        << 
493 RUSTDOC         = rustdoc                      << 
494 RUSTFMT         = rustfmt                      << 
495 CLIPPY_DRIVER   = clippy-driver                << 
496 BINDGEN         = bindgen                      << 
497 PAHOLE          = pahole                          418 PAHOLE          = pahole
498 RESOLVE_BTFIDS  = $(objtree)/tools/bpf/resolve << 
499 LEX             = flex                            419 LEX             = flex
500 YACC            = bison                           420 YACC            = bison
501 AWK             = awk                             421 AWK             = awk
502 INSTALLKERNEL  := installkernel                   422 INSTALLKERNEL  := installkernel
                                                   >> 423 DEPMOD          = /sbin/depmod
503 PERL            = perl                            424 PERL            = perl
                                                   >> 425 PYTHON          = python
                                                   >> 426 PYTHON2         = python2
504 PYTHON3         = python3                         427 PYTHON3         = python3
505 CHECK           = sparse                          428 CHECK           = sparse
506 BASH            = bash                            429 BASH            = bash
507 KGZIP           = gzip                         << 
508 KBZIP2          = bzip2                        << 
509 KLZOP           = lzop                         << 
510 LZMA            = lzma                         << 
511 LZ4             = lz4c                         << 
512 XZ              = xz                           << 
513 ZSTD            = zstd                         << 
514                                                   430 
515 CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC    431 CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
516                   -Wbitwise -Wno-return-void -    432                   -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
517 NOSTDINC_FLAGS :=                                 433 NOSTDINC_FLAGS :=
518 CFLAGS_MODULE   =                                 434 CFLAGS_MODULE   =
519 RUSTFLAGS_MODULE =                             << 
520 AFLAGS_MODULE   =                                 435 AFLAGS_MODULE   =
521 LDFLAGS_MODULE  =                                 436 LDFLAGS_MODULE  =
522 CFLAGS_KERNEL   =                                 437 CFLAGS_KERNEL   =
523 RUSTFLAGS_KERNEL =                             << 
524 AFLAGS_KERNEL   =                                 438 AFLAGS_KERNEL   =
525 LDFLAGS_vmlinux =                                 439 LDFLAGS_vmlinux =
526                                                   440 
527 # Use USERINCLUDE when you must reference the     441 # Use USERINCLUDE when you must reference the UAPI directories only.
528 USERINCLUDE    := \                               442 USERINCLUDE    := \
529                 -I$(srctree)/arch/$(SRCARCH)/i    443                 -I$(srctree)/arch/$(SRCARCH)/include/uapi \
530                 -I$(objtree)/arch/$(SRCARCH)/i    444                 -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \
531                 -I$(srctree)/include/uapi \       445                 -I$(srctree)/include/uapi \
532                 -I$(objtree)/include/generated    446                 -I$(objtree)/include/generated/uapi \
533                 -include $(srctree)/include/li << 
534                 -include $(srctree)/include/li    447                 -include $(srctree)/include/linux/kconfig.h
535                                                   448 
536 # Use LINUXINCLUDE when you must reference the    449 # Use LINUXINCLUDE when you must reference the include/ directory.
537 # Needed to be compatible with the O= option      450 # Needed to be compatible with the O= option
538 LINUXINCLUDE    := \                              451 LINUXINCLUDE    := \
539                 -I$(srctree)/arch/$(SRCARCH)/i    452                 -I$(srctree)/arch/$(SRCARCH)/include \
540                 -I$(objtree)/arch/$(SRCARCH)/i    453                 -I$(objtree)/arch/$(SRCARCH)/include/generated \
541                 $(if $(building_out_of_srctree    454                 $(if $(building_out_of_srctree),-I$(srctree)/include) \
542                 -I$(objtree)/include \            455                 -I$(objtree)/include \
543                 $(USERINCLUDE)                    456                 $(USERINCLUDE)
544                                                   457 
545 KBUILD_AFLAGS   := -D__ASSEMBLY__ -fno-PIE        458 KBUILD_AFLAGS   := -D__ASSEMBLY__ -fno-PIE
546                                                !! 459 KBUILD_CFLAGS   := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \
547 KBUILD_CFLAGS :=                               !! 460                    -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \
548 KBUILD_CFLAGS += -std=gnu11                    !! 461                    -Werror=implicit-function-declaration -Werror=implicit-int \
549 KBUILD_CFLAGS += -fshort-wchar                 !! 462                    -Wno-format-security \
550 KBUILD_CFLAGS += -funsigned-char               !! 463                    -std=gnu89
551 KBUILD_CFLAGS += -fno-common                   << 
552 KBUILD_CFLAGS += -fno-PIE                      << 
553 KBUILD_CFLAGS += -fno-strict-aliasing          << 
554                                                << 
555 KBUILD_CPPFLAGS := -D__KERNEL__                   464 KBUILD_CPPFLAGS := -D__KERNEL__
556 KBUILD_RUSTFLAGS := $(rust_common_flags) \     << 
557                     -Cpanic=abort -Cembed-bitc << 
558                     -Cforce-unwind-tables=n -C << 
559                     -Csymbol-mangling-version= << 
560                     -Crelocation-model=static  << 
561                     -Zfunction-sections=n \    << 
562                     -Wclippy::float_arithmetic << 
563                                                << 
564 KBUILD_AFLAGS_KERNEL :=                           465 KBUILD_AFLAGS_KERNEL :=
565 KBUILD_CFLAGS_KERNEL :=                           466 KBUILD_CFLAGS_KERNEL :=
566 KBUILD_RUSTFLAGS_KERNEL :=                     << 
567 KBUILD_AFLAGS_MODULE  := -DMODULE                 467 KBUILD_AFLAGS_MODULE  := -DMODULE
568 KBUILD_CFLAGS_MODULE  := -DMODULE                 468 KBUILD_CFLAGS_MODULE  := -DMODULE
569 KBUILD_RUSTFLAGS_MODULE := --cfg MODULE        << 
570 KBUILD_LDFLAGS_MODULE :=                          469 KBUILD_LDFLAGS_MODULE :=
                                                   >> 470 export KBUILD_LDS_MODULE := $(srctree)/scripts/module-common.lds
571 KBUILD_LDFLAGS :=                                 471 KBUILD_LDFLAGS :=
                                                   >> 472 GCC_PLUGINS_CFLAGS :=
572 CLANG_FLAGS :=                                    473 CLANG_FLAGS :=
573                                                   474 
574 ifeq ($(KBUILD_CLIPPY),1)                      !! 475 export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC
575         RUSTC_OR_CLIPPY_QUIET := CLIPPY        !! 476 export CPP AR NM STRIP OBJCOPY OBJDUMP OBJSIZE READELF PAHOLE LEX YACC AWK INSTALLKERNEL
576         RUSTC_OR_CLIPPY = $(CLIPPY_DRIVER)     !! 477 export PERL PYTHON PYTHON2 PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX
577 else                                           << 
578         RUSTC_OR_CLIPPY_QUIET := RUSTC         << 
579         RUSTC_OR_CLIPPY = $(RUSTC)             << 
580 endif                                          << 
581                                                << 
582 # Allows the usage of unstable features in sta << 
583 export RUSTC_BOOTSTRAP := 1                    << 
584                                                << 
585 export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC K << 
586 export RUSTC RUSTDOC RUSTFMT RUSTC_OR_CLIPPY_Q << 
587 export HOSTRUSTC KBUILD_HOSTRUSTFLAGS          << 
588 export CPP AR NM STRIP OBJCOPY OBJDUMP READELF << 
589 export PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_ << 
590 export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD     << 
591 export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS     478 export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE
592 export KBUILD_USERCFLAGS KBUILD_USERLDFLAGS    << 
593                                                   479 
594 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINC    480 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS
595 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODU    481 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
596 export KBUILD_RUSTFLAGS RUSTFLAGS_KERNEL RUSTF !! 482 export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN
597 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODU    483 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
598 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODU !! 484 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
599 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERN !! 485 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
600                                                   486 
601 # Files to ignore in find ... statements          487 # Files to ignore in find ... statements
602                                                   488 
603 export RCS_FIND_IGNORE := \( -name SCCS -o -na    489 export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o    \
604                           -name CVS -o -name .    490                           -name CVS -o -name .pc -o -name .hg -o -name .git \) \
605                           -prune -o               491                           -prune -o
                                                   >> 492 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
                                                   >> 493                          --exclude CVS --exclude .pc --exclude .hg --exclude .git
606                                                   494 
607 # ============================================    495 # ===========================================================================
608 # Rules shared between *config targets and bui    496 # Rules shared between *config targets and build targets
609                                                   497 
610 # Basic helpers built in scripts/basic/           498 # Basic helpers built in scripts/basic/
611 PHONY += scripts_basic                            499 PHONY += scripts_basic
612 scripts_basic:                                    500 scripts_basic:
613         $(Q)$(MAKE) $(build)=scripts/basic        501         $(Q)$(MAKE) $(build)=scripts/basic
                                                   >> 502         $(Q)rm -f .tmp_quiet_recordmcount
614                                                   503 
615 PHONY += outputmakefile                           504 PHONY += outputmakefile
616 ifdef building_out_of_srctree                  << 
617 # Before starting out-of-tree build, make sure    505 # Before starting out-of-tree build, make sure the source tree is clean.
618 # outputmakefile generates a Makefile in the o    506 # outputmakefile generates a Makefile in the output directory, if using a
619 # separate output directory. This allows conve    507 # separate output directory. This allows convenient use of make in the
620 # output directory.                               508 # output directory.
621 # At the same time when output Makefile genera    509 # At the same time when output Makefile generated, generate .gitignore to
622 # ignore whole output directory                   510 # ignore whole output directory
623                                                << 
624 quiet_cmd_makefile = GEN     Makefile          << 
625       cmd_makefile = { \                       << 
626         echo "\# Automatically generated by $( << 
627         echo "include $(srctree)/Makefile"; \  << 
628         } > Makefile                           << 
629                                                << 
630 outputmakefile:                                   511 outputmakefile:
631         @if [ -f $(srctree)/.config -o \       !! 512 ifdef building_out_of_srctree
                                                   >> 513         $(Q)if [ -f $(srctree)/.config -o \
632                  -d $(srctree)/include/config     514                  -d $(srctree)/include/config -o \
633                  -d $(srctree)/arch/$(SRCARCH)    515                  -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \
634                 echo >&2 "***"; \                 516                 echo >&2 "***"; \
635                 echo >&2 "*** The source tree     517                 echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \
636                 echo >&2 "*** in $(abs_srctree    518                 echo >&2 "*** in $(abs_srctree)";\
637                 echo >&2 "***"; \                 519                 echo >&2 "***"; \
638                 false; \                          520                 false; \
639         fi                                        521         fi
640         $(Q)ln -fsn $(srctree) source             522         $(Q)ln -fsn $(srctree) source
641         $(call cmd,makefile)                   !! 523         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree)
642         $(Q)test -e .gitignore || \               524         $(Q)test -e .gitignore || \
643         { echo "# this is build directory, ign    525         { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore
644 endif                                             526 endif
645                                                   527 
646 # The expansion should be delayed until arch/$ !! 528 ifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),)
647 # Some architectures define CROSS_COMPILE in a !! 529 ifneq ($(CROSS_COMPILE),)
648 # CC_VERSION_TEXT and RUSTC_VERSION_TEXT are r !! 530 CLANG_FLAGS     += --target=$(notdir $(CROSS_COMPILE:%-=%))
649 # need export), and from include/config/auto.c !! 531 GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit))
650 # upgrade.                                     !! 532 CLANG_FLAGS     += --prefix=$(GCC_TOOLCHAIN_DIR)
651 CC_VERSION_TEXT = $(subst $(pound),,$(shell LC !! 533 GCC_TOOLCHAIN   := $(realpath $(GCC_TOOLCHAIN_DIR)/..)
652 RUSTC_VERSION_TEXT = $(subst $(pound),,$(shell !! 534 endif
653                                                !! 535 ifneq ($(GCC_TOOLCHAIN),)
654 ifneq ($(findstring clang,$(CC_VERSION_TEXT)), !! 536 CLANG_FLAGS     += --gcc-toolchain=$(GCC_TOOLCHAIN)
655 include $(srctree)/scripts/Makefile.clang      !! 537 endif
                                                   >> 538 ifeq ($(shell $(AS) --version 2>&1 | head -n 1 | grep clang),)
                                                   >> 539 CLANG_FLAGS     += -no-integrated-as
                                                   >> 540 endif
                                                   >> 541 CLANG_FLAGS     += -Werror=unknown-warning-option
                                                   >> 542 KBUILD_CFLAGS   += $(CLANG_FLAGS)
                                                   >> 543 KBUILD_AFLAGS   += $(CLANG_FLAGS)
                                                   >> 544 export CLANG_FLAGS
656 endif                                             545 endif
657                                                   546 
658 # Include this also for config targets because !! 547 # The expansion should be delayed until arch/$(SRCARCH)/Makefile is included.
659 # cc-cross-prefix to determine CROSS_COMPILE.  !! 548 # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile.
660 ifdef need-compiler                            !! 549 # CC_VERSION_TEXT is referenced from Kconfig (so it needs export),
661 include $(srctree)/scripts/Makefile.compiler   !! 550 # and from include/config/auto.conf.cmd to detect the compiler upgrade.
662 endif                                          !! 551 CC_VERSION_TEXT = $(shell $(CC) --version 2>/dev/null | head -n 1)
663                                                   552 
664 ifdef config-build                                553 ifdef config-build
665 # ============================================    554 # ===========================================================================
666 # *config targets only - make sure prerequisit    555 # *config targets only - make sure prerequisites are updated, and descend
667 # in scripts/kconfig to make the *config targe    556 # in scripts/kconfig to make the *config target
668                                                   557 
669 # Read arch-specific Makefile to set KBUILD_DE !! 558 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
670 # KBUILD_DEFCONFIG may point out an alternativ    559 # KBUILD_DEFCONFIG may point out an alternative default configuration
671 # used for 'make defconfig'                       560 # used for 'make defconfig'
672 include $(srctree)/arch/$(SRCARCH)/Makefile    !! 561 include arch/$(SRCARCH)/Makefile
673 export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERS !! 562 export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT
674                                                   563 
675 config: outputmakefile scripts_basic FORCE        564 config: outputmakefile scripts_basic FORCE
676         $(Q)$(MAKE) $(build)=scripts/kconfig $    565         $(Q)$(MAKE) $(build)=scripts/kconfig $@
677                                                   566 
678 %config: outputmakefile scripts_basic FORCE       567 %config: outputmakefile scripts_basic FORCE
679         $(Q)$(MAKE) $(build)=scripts/kconfig $    568         $(Q)$(MAKE) $(build)=scripts/kconfig $@
680                                                   569 
681 else #!config-build                               570 else #!config-build
682 # ============================================    571 # ===========================================================================
683 # Build targets only - this includes vmlinux,  !! 572 # Build targets only - this includes vmlinux, arch specific targets, clean
684 # targets and others. In general all targets e    573 # targets and others. In general all targets except *config targets.
685                                                   574 
686 # If building an external module we do not car    575 # If building an external module we do not care about the all: rule
687 # but instead __all depend on modules          !! 576 # but instead _all depend on modules
688 PHONY += all                                      577 PHONY += all
689 ifeq ($(KBUILD_EXTMOD),)                          578 ifeq ($(KBUILD_EXTMOD),)
690 __all: all                                     !! 579 _all: all
691 else                                              580 else
692 __all: modules                                 !! 581 _all: modules
693 endif                                             582 endif
694                                                   583 
695 targets :=                                     << 
696                                                << 
697 # Decide whether to build built-in, modular, o    584 # Decide whether to build built-in, modular, or both.
698 # Normally, just do built-in.                     585 # Normally, just do built-in.
699                                                   586 
700 KBUILD_MODULES :=                                 587 KBUILD_MODULES :=
701 KBUILD_BUILTIN := 1                               588 KBUILD_BUILTIN := 1
702                                                   589 
703 # If we have only "make modules", don't compil    590 # If we have only "make modules", don't compile built-in objects.
                                                   >> 591 # When we're building modules with modversions, we need to consider
                                                   >> 592 # the built-in objects during the descend as well, in order to
                                                   >> 593 # make sure the checksums are up to date before we record them.
                                                   >> 594 
704 ifeq ($(MAKECMDGOALS),modules)                    595 ifeq ($(MAKECMDGOALS),modules)
705   KBUILD_BUILTIN :=                            !! 596   KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
706 endif                                             597 endif
707                                                   598 
708 # If we have "make <whatever> modules", compil    599 # If we have "make <whatever> modules", compile modules
709 # in addition to whatever we do anyway.           600 # in addition to whatever we do anyway.
710 # Just "make" or "make all" shall build module    601 # Just "make" or "make all" shall build modules as well
711                                                   602 
712 ifneq ($(filter all modules nsdeps %compile_co !! 603 ifneq ($(filter all _all modules nsdeps,$(MAKECMDGOALS)),)
713   KBUILD_MODULES := 1                             604   KBUILD_MODULES := 1
714 endif                                             605 endif
715                                                   606 
716 ifeq ($(MAKECMDGOALS),)                           607 ifeq ($(MAKECMDGOALS),)
717   KBUILD_MODULES := 1                             608   KBUILD_MODULES := 1
718 endif                                             609 endif
719                                                   610 
720 export KBUILD_MODULES KBUILD_BUILTIN              611 export KBUILD_MODULES KBUILD_BUILTIN
721                                                   612 
722 ifdef need-config                                 613 ifdef need-config
723 include include/config/auto.conf                  614 include include/config/auto.conf
724 endif                                             615 endif
725                                                   616 
726 ifeq ($(KBUILD_EXTMOD),)                          617 ifeq ($(KBUILD_EXTMOD),)
727 # Objects we will link into vmlinux / subdirs     618 # Objects we will link into vmlinux / subdirs we need to visit
728 core-y          :=                             !! 619 init-y          := init/
729 drivers-y       :=                             !! 620 drivers-y       := drivers/ sound/
                                                   >> 621 drivers-$(CONFIG_SAMPLES) += samples/
                                                   >> 622 net-y           := net/
730 libs-y          := lib/                           623 libs-y          := lib/
                                                   >> 624 core-y          := usr/
                                                   >> 625 virt-y          := virt/
731 endif # KBUILD_EXTMOD                             626 endif # KBUILD_EXTMOD
732                                                   627 
733 # The all: target is the default when no targe    628 # The all: target is the default when no target is given on the
734 # command line.                                   629 # command line.
735 # This allow a user to issue only 'make' to bu    630 # This allow a user to issue only 'make' to build a kernel including modules
736 # Defaults to vmlinux, but the arch makefile u    631 # Defaults to vmlinux, but the arch makefile usually adds further targets
737 all: vmlinux                                      632 all: vmlinux
738                                                   633 
739 CFLAGS_GCOV     := -fprofile-arcs -ftest-cover !! 634 CFLAGS_GCOV     := -fprofile-arcs -ftest-coverage \
740 ifdef CONFIG_CC_IS_GCC                         !! 635         $(call cc-option,-fno-tree-loop-im) \
741 CFLAGS_GCOV     += -fno-tree-loop-im           !! 636         $(call cc-disable-warning,maybe-uninitialized,)
742 endif                                          << 
743 export CFLAGS_GCOV                                637 export CFLAGS_GCOV
744                                                   638 
745 # The arch Makefiles can override CC_FLAGS_FTR    639 # The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later.
746 ifdef CONFIG_FUNCTION_TRACER                      640 ifdef CONFIG_FUNCTION_TRACER
747   CC_FLAGS_FTRACE := -pg                          641   CC_FLAGS_FTRACE := -pg
748 endif                                             642 endif
749                                                   643 
750 include $(srctree)/arch/$(SRCARCH)/Makefile    !! 644 RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register
                                                   >> 645 RETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register
                                                   >> 646 RETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk
                                                   >> 647 RETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline
                                                   >> 648 RETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG)))
                                                   >> 649 RETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG)))
                                                   >> 650 export RETPOLINE_CFLAGS
                                                   >> 651 export RETPOLINE_VDSO_CFLAGS
                                                   >> 652 
                                                   >> 653 include arch/$(SRCARCH)/Makefile
751                                                   654 
752 ifdef need-config                                 655 ifdef need-config
753 ifdef may-sync-config                             656 ifdef may-sync-config
754 # Read in dependencies to all Kconfig* files,     657 # Read in dependencies to all Kconfig* files, make sure to run syncconfig if
755 # changes are detected. This should be include    658 # changes are detected. This should be included after arch/$(SRCARCH)/Makefile
756 # because some architectures define CROSS_COMP    659 # because some architectures define CROSS_COMPILE there.
757 include include/config/auto.conf.cmd              660 include include/config/auto.conf.cmd
758                                                   661 
759 $(KCONFIG_CONFIG):                                662 $(KCONFIG_CONFIG):
760         @echo >&2 '***'                           663         @echo >&2 '***'
761         @echo >&2 '*** Configuration file "$@"    664         @echo >&2 '*** Configuration file "$@" not found!'
762         @echo >&2 '***'                           665         @echo >&2 '***'
763         @echo >&2 '*** Please run some configu    666         @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or'
764         @echo >&2 '*** "make menuconfig" or "m    667         @echo >&2 '*** "make menuconfig" or "make xconfig").'
765         @echo >&2 '***'                           668         @echo >&2 '***'
766         @/bin/false                               669         @/bin/false
767                                                   670 
768 # The actual configuration files used during t    671 # The actual configuration files used during the build are stored in
769 # include/generated/ and include/config/. Upda    672 # include/generated/ and include/config/. Update them if .config is newer than
770 # include/config/auto.conf (which mirrors .con    673 # include/config/auto.conf (which mirrors .config).
771 #                                                 674 #
772 # This exploits the 'multi-target pattern rule    675 # This exploits the 'multi-target pattern rule' trick.
773 # The syncconfig should be executed only once     676 # The syncconfig should be executed only once to make all the targets.
774 # (Note: use the grouped target '&:' when we b !! 677 %/auto.conf %/auto.conf.cmd %/tristate.conf: $(KCONFIG_CONFIG)
775 #                                              << 
776 # Do not use $(call cmd,...) here. That would  << 
777 # so you cannot notice that Kconfig is waiting << 
778 %/config/auto.conf %/config/auto.conf.cmd %/ge << 
779         $(Q)$(kecho) "  SYNC    $@"            << 
780         $(Q)$(MAKE) -f $(srctree)/Makefile syn    678         $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig
781 else # !may-sync-config                           679 else # !may-sync-config
782 # External modules and some install targets ne    680 # External modules and some install targets need include/generated/autoconf.h
783 # and include/config/auto.conf but do not care    681 # and include/config/auto.conf but do not care if they are up-to-date.
784 # Use auto.conf to trigger the test               682 # Use auto.conf to trigger the test
785 PHONY += include/config/auto.conf                 683 PHONY += include/config/auto.conf
786                                                   684 
787 include/config/auto.conf:                         685 include/config/auto.conf:
788         @test -e include/generated/autoconf.h  !! 686         $(Q)test -e include/generated/autoconf.h -a -e $@ || (          \
789         echo >&2;                                 687         echo >&2;                                                       \
790         echo >&2 "  ERROR: Kernel configuratio    688         echo >&2 "  ERROR: Kernel configuration is invalid.";           \
791         echo >&2 "         include/generated/a    689         echo >&2 "         include/generated/autoconf.h or $@ are missing.";\
792         echo >&2 "         Run 'make oldconfig    690         echo >&2 "         Run 'make oldconfig && make prepare' on kernel src to fix it.";      \
793         echo >&2 ;                                691         echo >&2 ;                                                      \
794         /bin/false)                               692         /bin/false)
795                                                   693 
796 endif # may-sync-config                           694 endif # may-sync-config
797 endif # need-config                               695 endif # need-config
798                                                   696 
799 KBUILD_CFLAGS   += -fno-delete-null-pointer-ch !! 697 KBUILD_CFLAGS   += $(call cc-option,-fno-delete-null-pointer-checks,)
                                                   >> 698 KBUILD_CFLAGS   += $(call cc-disable-warning,frame-address,)
                                                   >> 699 KBUILD_CFLAGS   += $(call cc-disable-warning, format-truncation)
                                                   >> 700 KBUILD_CFLAGS   += $(call cc-disable-warning, format-overflow)
                                                   >> 701 KBUILD_CFLAGS   += $(call cc-disable-warning, address-of-packed-member)
800                                                   702 
801 ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE          703 ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
802 KBUILD_CFLAGS += -O2                              704 KBUILD_CFLAGS += -O2
803 KBUILD_RUSTFLAGS += -Copt-level=2              !! 705 else ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3
                                                   >> 706 KBUILD_CFLAGS += -O3
804 else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE            707 else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
805 KBUILD_CFLAGS += -Os                              708 KBUILD_CFLAGS += -Os
806 KBUILD_RUSTFLAGS += -Copt-level=s              << 
807 endif                                             709 endif
808                                                   710 
809 # Always set `debug-assertions` and `overflow- !! 711 ifdef CONFIG_CC_DISABLE_WARN_MAYBE_UNINITIALIZED
810 # depends on `opt-level` and `debug-assertions !! 712 KBUILD_CFLAGS   += -Wno-maybe-uninitialized
811 KBUILD_RUSTFLAGS += -Cdebug-assertions=$(if $( !! 713 endif
812 KBUILD_RUSTFLAGS += -Coverflow-checks=$(if $(C << 
813                                                   714 
814 # Tell gcc to never replace conditional load w    715 # Tell gcc to never replace conditional load with a non-conditional one
815 ifdef CONFIG_CC_IS_GCC                         << 
816 # gcc-10 renamed --param=allow-store-data-race << 
817 # -fno-allow-store-data-races.                 << 
818 KBUILD_CFLAGS   += $(call cc-option,--param=al    716 KBUILD_CFLAGS   += $(call cc-option,--param=allow-store-data-races=0)
819 KBUILD_CFLAGS   += $(call cc-option,-fno-allow !! 717 
820 endif                                          !! 718 include scripts/Makefile.kcov
                                                   >> 719 include scripts/Makefile.gcc-plugins
821                                                   720 
822 ifdef CONFIG_READABLE_ASM                         721 ifdef CONFIG_READABLE_ASM
823 # Disable optimizations that make assembler li    722 # Disable optimizations that make assembler listings hard to read.
824 # reorder blocks reorders the control in the f    723 # reorder blocks reorders the control in the function
825 # ipa clone creates specialized cloned functio    724 # ipa clone creates specialized cloned functions
826 # partial inlining inlines only parts of funct    725 # partial inlining inlines only parts of functions
827 KBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa- !! 726 KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
                                                   >> 727                  $(call cc-option,-fno-ipa-cp-clone,) \
                                                   >> 728                  $(call cc-option,-fno-partial-inlining)
                                                   >> 729 endif
                                                   >> 730 
                                                   >> 731 ifneq ($(CONFIG_FRAME_WARN),0)
                                                   >> 732 KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
828 endif                                             733 endif
829                                                   734 
830 stackp-flags-y                                 !! 735 stackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector
831 stackp-flags-$(CONFIG_STACKPROTECTOR)             736 stackp-flags-$(CONFIG_STACKPROTECTOR)             := -fstack-protector
832 stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG)      737 stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG)      := -fstack-protector-strong
833                                                   738 
834 KBUILD_CFLAGS += $(stackp-flags-y)                739 KBUILD_CFLAGS += $(stackp-flags-y)
835                                                   740 
836 KBUILD_RUSTFLAGS-$(CONFIG_WERROR) += -Dwarning !! 741 ifdef CONFIG_CC_IS_CLANG
837 KBUILD_RUSTFLAGS += $(KBUILD_RUSTFLAGS-y)      !! 742 KBUILD_CPPFLAGS += -Qunused-arguments
                                                   >> 743 KBUILD_CFLAGS += -Wno-format-invalid-specifier
                                                   >> 744 KBUILD_CFLAGS += -Wno-gnu
                                                   >> 745 # Quiet clang warning: comparison of unsigned expression < 0 is always false
                                                   >> 746 KBUILD_CFLAGS += -Wno-tautological-compare
                                                   >> 747 # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
                                                   >> 748 # source of a reference will be _MergedGlobals and not on of the whitelisted names.
                                                   >> 749 # See modpost pattern 2
                                                   >> 750 KBUILD_CFLAGS += -mno-global-merge
                                                   >> 751 else
                                                   >> 752 
                                                   >> 753 # These warnings generated too much noise in a regular build.
                                                   >> 754 # Use make W=1 to enable them (see scripts/Makefile.extrawarn)
                                                   >> 755 KBUILD_CFLAGS += -Wno-unused-but-set-variable
                                                   >> 756 
                                                   >> 757 # Warn about unmarked fall-throughs in switch statement.
                                                   >> 758 # Disabled for clang while comment to attribute conversion happens and
                                                   >> 759 # https://github.com/ClangBuiltLinux/linux/issues/636 is discussed.
                                                   >> 760 KBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough,)
                                                   >> 761 endif
838                                                   762 
                                                   >> 763 KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
839 ifdef CONFIG_FRAME_POINTER                        764 ifdef CONFIG_FRAME_POINTER
840 KBUILD_CFLAGS   += -fno-omit-frame-pointer -fn    765 KBUILD_CFLAGS   += -fno-omit-frame-pointer -fno-optimize-sibling-calls
841 KBUILD_RUSTFLAGS += -Cforce-frame-pointers=y   << 
842 else                                              766 else
843 # Some targets (ARM with Thumb2, for example),    767 # Some targets (ARM with Thumb2, for example), can't be built with frame
844 # pointers.  For those, we don't have FUNCTION    768 # pointers.  For those, we don't have FUNCTION_TRACER automatically
845 # select FRAME_POINTER.  However, FUNCTION_TRA    769 # select FRAME_POINTER.  However, FUNCTION_TRACER adds -pg, and this is
846 # incompatible with -fomit-frame-pointer with     770 # incompatible with -fomit-frame-pointer with current GCC, so we don't use
847 # -fomit-frame-pointer with FUNCTION_TRACER.      771 # -fomit-frame-pointer with FUNCTION_TRACER.
848 # In the Rust target specification, "frame-poi << 
849 # to "may-omit".                               << 
850 ifndef CONFIG_FUNCTION_TRACER                     772 ifndef CONFIG_FUNCTION_TRACER
851 KBUILD_CFLAGS   += -fomit-frame-pointer           773 KBUILD_CFLAGS   += -fomit-frame-pointer
852 endif                                             774 endif
853 endif                                             775 endif
854                                                   776 
855 # Initialize all stack variables with a 0xAA p !! 777 # Initialize all stack variables with a pattern, if desired.
856 ifdef CONFIG_INIT_STACK_ALL_PATTERN            !! 778 ifdef CONFIG_INIT_STACK_ALL
857 KBUILD_CFLAGS   += -ftrivial-auto-var-init=pat    779 KBUILD_CFLAGS   += -ftrivial-auto-var-init=pattern
858 endif                                             780 endif
859                                                   781 
860 # Initialize all stack variables with a zero v !! 782 DEBUG_CFLAGS    := $(call cc-option, -fno-var-tracking-assignments)
861 ifdef CONFIG_INIT_STACK_ALL_ZERO               !! 783 
862 KBUILD_CFLAGS   += -ftrivial-auto-var-init=zer !! 784 ifdef CONFIG_DEBUG_INFO
863 ifdef CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_ENABLER !! 785 ifdef CONFIG_DEBUG_INFO_SPLIT
864 # https://github.com/llvm/llvm-project/issues/ !! 786 DEBUG_CFLAGS    += -gsplit-dwarf
865 CC_AUTO_VAR_INIT_ZERO_ENABLER := -enable-trivi !! 787 else
866 export CC_AUTO_VAR_INIT_ZERO_ENABLER           !! 788 DEBUG_CFLAGS    += -g
867 KBUILD_CFLAGS   += $(CC_AUTO_VAR_INIT_ZERO_ENA !! 789 endif
                                                   >> 790 KBUILD_AFLAGS   += -Wa,-gdwarf-2
868 endif                                             791 endif
                                                   >> 792 ifdef CONFIG_DEBUG_INFO_DWARF4
                                                   >> 793 DEBUG_CFLAGS    += -gdwarf-4
869 endif                                             794 endif
870                                                   795 
871 # While VLAs have been removed, GCC produces u !! 796 ifdef CONFIG_DEBUG_INFO_REDUCED
872 # for the randomize_kstack_offset feature. Dis !! 797 DEBUG_CFLAGS    += $(call cc-option, -femit-struct-debug-baseonly) \
873 KBUILD_CFLAGS   += $(call cc-option, -fno-stac !! 798                    $(call cc-option,-fno-var-tracking)
874                                                << 
875 # Clear used registers at func exit (to reduce << 
876 ifdef CONFIG_ZERO_CALL_USED_REGS               << 
877 KBUILD_CFLAGS   += -fzero-call-used-regs=used- << 
878 endif                                             799 endif
879                                                   800 
                                                   >> 801 KBUILD_CFLAGS += $(DEBUG_CFLAGS)
                                                   >> 802 export DEBUG_CFLAGS
                                                   >> 803 
880 ifdef CONFIG_FUNCTION_TRACER                      804 ifdef CONFIG_FUNCTION_TRACER
881 ifdef CONFIG_FTRACE_MCOUNT_USE_CC              !! 805 ifdef CONFIG_FTRACE_MCOUNT_RECORD
882   CC_FLAGS_FTRACE       += -mrecord-mcount     !! 806   # gcc 5 supports generating the mcount tables directly
                                                   >> 807   ifeq ($(call cc-option-yn,-mrecord-mcount),y)
                                                   >> 808     CC_FLAGS_FTRACE     += -mrecord-mcount
                                                   >> 809     export CC_USING_RECORD_MCOUNT := 1
                                                   >> 810   endif
883   ifdef CONFIG_HAVE_NOP_MCOUNT                    811   ifdef CONFIG_HAVE_NOP_MCOUNT
884     ifeq ($(call cc-option-yn, -mnop-mcount),y    812     ifeq ($(call cc-option-yn, -mnop-mcount),y)
885       CC_FLAGS_FTRACE   += -mnop-mcount           813       CC_FLAGS_FTRACE   += -mnop-mcount
886       CC_FLAGS_USING    += -DCC_USING_NOP_MCOU    814       CC_FLAGS_USING    += -DCC_USING_NOP_MCOUNT
887     endif                                         815     endif
888   endif                                           816   endif
889 endif                                             817 endif
890 ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL         << 
891   ifdef CONFIG_HAVE_OBJTOOL_NOP_MCOUNT         << 
892     CC_FLAGS_USING      += -DCC_USING_NOP_MCOU << 
893   endif                                        << 
894 endif                                          << 
895 ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT    << 
896   ifdef CONFIG_HAVE_C_RECORDMCOUNT             << 
897     BUILD_C_RECORDMCOUNT := y                  << 
898     export BUILD_C_RECORDMCOUNT                << 
899   endif                                        << 
900 endif                                          << 
901 ifdef CONFIG_HAVE_FENTRY                          818 ifdef CONFIG_HAVE_FENTRY
902   # s390-linux-gnu-gcc did not support -mfentr << 
903   ifeq ($(call cc-option-yn, -mfentry),y)         819   ifeq ($(call cc-option-yn, -mfentry),y)
904     CC_FLAGS_FTRACE     += -mfentry               820     CC_FLAGS_FTRACE     += -mfentry
905     CC_FLAGS_USING      += -DCC_USING_FENTRY      821     CC_FLAGS_USING      += -DCC_USING_FENTRY
906   endif                                           822   endif
907 endif                                             823 endif
908 export CC_FLAGS_FTRACE                            824 export CC_FLAGS_FTRACE
909 KBUILD_CFLAGS   += $(CC_FLAGS_FTRACE) $(CC_FLA    825 KBUILD_CFLAGS   += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING)
910 KBUILD_AFLAGS   += $(CC_FLAGS_USING)              826 KBUILD_AFLAGS   += $(CC_FLAGS_USING)
                                                   >> 827 ifdef CONFIG_DYNAMIC_FTRACE
                                                   >> 828         ifdef CONFIG_HAVE_C_RECORDMCOUNT
                                                   >> 829                 BUILD_C_RECORDMCOUNT := y
                                                   >> 830                 export BUILD_C_RECORDMCOUNT
                                                   >> 831         endif
                                                   >> 832 endif
911 endif                                             833 endif
912                                                   834 
913 # We trigger additional mismatches with less i    835 # We trigger additional mismatches with less inlining
914 ifdef CONFIG_DEBUG_SECTION_MISMATCH               836 ifdef CONFIG_DEBUG_SECTION_MISMATCH
915 KBUILD_CFLAGS += -fno-inline-functions-called- !! 837 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
916 endif                                             838 endif
917                                                   839 
918 # `rustc`'s `-Zfunction-sections` applies to d << 
919 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION        840 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
920 KBUILD_CFLAGS_KERNEL += -ffunction-sections -f    841 KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections
921 KBUILD_RUSTFLAGS_KERNEL += -Zfunction-sections << 
922 LDFLAGS_vmlinux += --gc-sections                  842 LDFLAGS_vmlinux += --gc-sections
923 endif                                             843 endif
924                                                   844 
925 ifdef CONFIG_SHADOW_CALL_STACK                 !! 845 ifdef CONFIG_LIVEPATCH
926 ifndef CONFIG_DYNAMIC_SCS                      !! 846 KBUILD_CFLAGS += $(call cc-option, -flive-patching=inline-clone)
927 CC_FLAGS_SCS    := -fsanitize=shadow-call-stac << 
928 KBUILD_CFLAGS   += $(CC_FLAGS_SCS)             << 
929 KBUILD_RUSTFLAGS += -Zsanitizer=shadow-call-st << 
930 endif                                          << 
931 export CC_FLAGS_SCS                            << 
932 endif                                          << 
933                                                << 
934 ifdef CONFIG_LTO_CLANG                         << 
935 ifdef CONFIG_LTO_CLANG_THIN                    << 
936 CC_FLAGS_LTO    := -flto=thin -fsplit-lto-unit << 
937 else                                           << 
938 CC_FLAGS_LTO    := -flto                       << 
939 endif                                          << 
940 CC_FLAGS_LTO    += -fvisibility=hidden         << 
941                                                << 
942 # Limit inlining across translation units to r << 
943 KBUILD_LDFLAGS += -mllvm -import-instr-limit=5 << 
944 endif                                             847 endif
945                                                   848 
946 ifdef CONFIG_LTO                               !! 849 # arch Makefile may override CC so keep this after arch Makefile is included
947 KBUILD_CFLAGS   += -fno-lto $(CC_FLAGS_LTO)    !! 850 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
948 KBUILD_AFLAGS   += -fno-lto                    << 
949 export CC_FLAGS_LTO                            << 
950 endif                                          << 
951                                                << 
952 ifdef CONFIG_CFI_CLANG                         << 
953 CC_FLAGS_CFI    := -fsanitize=kcfi             << 
954 ifdef CONFIG_CFI_ICALL_NORMALIZE_INTEGERS      << 
955         CC_FLAGS_CFI    += -fsanitize-cfi-ical << 
956 endif                                          << 
957 ifdef CONFIG_RUST                              << 
958         # Always pass -Zsanitizer-cfi-normaliz << 
959         # CONFIG_CFI_ICALL_NORMALIZE_INTEGERS. << 
960         RUSTC_FLAGS_CFI   := -Zsanitizer=kcfi  << 
961         KBUILD_RUSTFLAGS += $(RUSTC_FLAGS_CFI) << 
962         export RUSTC_FLAGS_CFI                 << 
963 endif                                          << 
964 KBUILD_CFLAGS   += $(CC_FLAGS_CFI)             << 
965 export CC_FLAGS_CFI                            << 
966 endif                                          << 
967                                                   851 
968 # Architectures can define flags to add/remove !! 852 # warn about C99 declaration after statement
969 CC_FLAGS_FPU    += -D_LINUX_FPU_COMPILATION_UN !! 853 KBUILD_CFLAGS += -Wdeclaration-after-statement
970 export CC_FLAGS_FPU                            << 
971 export CC_FLAGS_NO_FPU                         << 
972                                                   854 
973 ifneq ($(CONFIG_FUNCTION_ALIGNMENT),0)         !! 855 # Variable Length Arrays (VLAs) should not be used anywhere in the kernel
974 # Set the minimal function alignment. Use the  !! 856 KBUILD_CFLAGS += -Wvla
975 # -fmin-function-alignment if it is available, << 
976 # See also CONFIG_CC_HAS_SANE_FUNCTION_ALIGNME << 
977 ifdef CONFIG_CC_HAS_MIN_FUNCTION_ALIGNMENT     << 
978 KBUILD_CFLAGS += -fmin-function-alignment=$(CO << 
979 else                                           << 
980 KBUILD_CFLAGS += -falign-functions=$(CONFIG_FU << 
981 endif                                          << 
982 endif                                          << 
983                                                   857 
984 # arch Makefile may override CC so keep this a !! 858 # disable pointer signed / unsigned warnings in gcc 4.0
985 NOSTDINC_FLAGS += -nostdinc                    !! 859 KBUILD_CFLAGS += -Wno-pointer-sign
986                                                   860 
987 # To gain proper coverage for CONFIG_UBSAN_BOU !! 861 # disable stringop warnings in gcc 8+
988 # the kernel uses only C99 flexible arrays for !! 862 KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
989 # arrays. Enforce this for everything that may << 
990 # perform bounds checking.                     << 
991 KBUILD_CFLAGS += $(call cc-option, -fstrict-fl << 
992                                                << 
993 #Currently, disable -Wstringop-overflow for GC << 
994 KBUILD_CFLAGS-$(CONFIG_CC_NO_STRINGOP_OVERFLOW << 
995 KBUILD_CFLAGS-$(CONFIG_CC_STRINGOP_OVERFLOW) + << 
996                                                   863 
997 # disable invalid "can't wrap" optimizations f    864 # disable invalid "can't wrap" optimizations for signed / pointers
998 KBUILD_CFLAGS   += -fno-strict-overflow        !! 865 KBUILD_CFLAGS   += $(call cc-option,-fno-strict-overflow)
                                                   >> 866 
                                                   >> 867 # clang sets -fmerge-all-constants by default as optimization, but this
                                                   >> 868 # is non-conforming behavior for C and in fact breaks the kernel, so we
                                                   >> 869 # need to disable it here generally.
                                                   >> 870 KBUILD_CFLAGS   += $(call cc-option,-fno-merge-all-constants)
                                                   >> 871 
                                                   >> 872 # for gcc -fno-merge-all-constants disables everything, but it is fine
                                                   >> 873 # to have actual conforming behavior enabled.
                                                   >> 874 KBUILD_CFLAGS   += $(call cc-option,-fmerge-constants)
999                                                   875 
1000 # Make sure -fstack-check isn't enabled (like    876 # Make sure -fstack-check isn't enabled (like gentoo apparently did)
1001 KBUILD_CFLAGS  += -fno-stack-check            !! 877 KBUILD_CFLAGS  += $(call cc-option,-fno-stack-check,)
1002                                                  878 
1003 # conserve stack if available                    879 # conserve stack if available
1004 ifdef CONFIG_CC_IS_GCC                        !! 880 KBUILD_CFLAGS   += $(call cc-option,-fconserve-stack)
1005 KBUILD_CFLAGS   += -fconserve-stack           !! 881 
1006 endif                                         !! 882 # Prohibit date/time macros, which would make the build non-deterministic
                                                   >> 883 KBUILD_CFLAGS   += $(call cc-option,-Werror=date-time)
                                                   >> 884 
                                                   >> 885 # enforce correct pointer usage
                                                   >> 886 KBUILD_CFLAGS   += $(call cc-option,-Werror=incompatible-pointer-types)
                                                   >> 887 
                                                   >> 888 # Require designated initializers for all marked structures
                                                   >> 889 KBUILD_CFLAGS   += $(call cc-option,-Werror=designated-init)
1007                                                  890 
1008 # change __FILE__ to the relative path from t    891 # change __FILE__ to the relative path from the srctree
1009 KBUILD_CPPFLAGS += $(call cc-option,-fmacro-p !! 892 KBUILD_CFLAGS   += $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
1010                                                  893 
1011 # include additional Makefiles when needed    !! 894 # ensure -fcf-protection is disabled when using retpoline as it is
1012 include-y                       := scripts/Ma !! 895 # incompatible with -mindirect-branch=thunk-extern
1013 include-$(CONFIG_DEBUG_INFO)    += scripts/Ma !! 896 ifdef CONFIG_RETPOLINE
1014 include-$(CONFIG_DEBUG_INFO_BTF)+= scripts/Ma !! 897 KBUILD_CFLAGS += $(call cc-option,-fcf-protection=none)
1015 include-$(CONFIG_KASAN)         += scripts/Ma !! 898 endif
1016 include-$(CONFIG_KCSAN)         += scripts/Ma !! 899 
1017 include-$(CONFIG_KMSAN)         += scripts/Ma !! 900 include scripts/Makefile.kasan
1018 include-$(CONFIG_UBSAN)         += scripts/Ma !! 901 include scripts/Makefile.extrawarn
1019 include-$(CONFIG_KCOV)          += scripts/Ma !! 902 include scripts/Makefile.ubsan
1020 include-$(CONFIG_RANDSTRUCT)    += scripts/Ma << 
1021 include-$(CONFIG_GCC_PLUGINS)   += scripts/Ma << 
1022                                               << 
1023 include $(addprefix $(srctree)/, $(include-y) << 
1024                                               << 
1025 # scripts/Makefile.gcc-plugins is intentional << 
1026 # Do not add $(call cc-option,...) below this << 
1027 # from the clean source tree, the GCC plugins << 
1028                                                  903 
1029 # Add user supplied CPPFLAGS, AFLAGS, CFLAGS  !! 904 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
1030 KBUILD_CPPFLAGS += $(KCPPFLAGS)                  905 KBUILD_CPPFLAGS += $(KCPPFLAGS)
1031 KBUILD_AFLAGS   += $(KAFLAGS)                    906 KBUILD_AFLAGS   += $(KAFLAGS)
1032 KBUILD_CFLAGS   += $(KCFLAGS)                    907 KBUILD_CFLAGS   += $(KCFLAGS)
1033 KBUILD_RUSTFLAGS += $(KRUSTFLAGS)             << 
1034                                               << 
1035 KBUILD_LDFLAGS_MODULE += --build-id=sha1      << 
1036 LDFLAGS_vmlinux += --build-id=sha1            << 
1037                                                  908 
1038 KBUILD_LDFLAGS  += -z noexecstack             !! 909 KBUILD_LDFLAGS_MODULE += --build-id
1039 ifeq ($(CONFIG_LD_IS_BFD),y)                  !! 910 LDFLAGS_vmlinux += --build-id
1040 KBUILD_LDFLAGS  += $(call ld-option,--no-warn << 
1041 endif                                         << 
1042                                                  911 
1043 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)                912 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
1044 LDFLAGS_vmlinux += -X                         !! 913 LDFLAGS_vmlinux += $(call ld-option, -X,)
1045 endif                                            914 endif
1046                                                  915 
1047 ifeq ($(CONFIG_RELR),y)                          916 ifeq ($(CONFIG_RELR),y)
1048 # ld.lld before 15 did not support -z pack-re !! 917 LDFLAGS_vmlinux += --pack-dyn-relocs=relr
1049 LDFLAGS_vmlinux += $(call ld-option,--pack-dy << 
1050 endif                                         << 
1051                                               << 
1052 # We never want expected sections to be place << 
1053 # linker. All sections should be explicitly n << 
1054 ifdef CONFIG_LD_ORPHAN_WARN                   << 
1055 LDFLAGS_vmlinux += --orphan-handling=$(CONFIG << 
1056 endif                                            918 endif
1057                                                  919 
1058 # Align the bit size of userspace programs wi << 
1059 KBUILD_USERCFLAGS  += $(filter -m32 -m64 --ta << 
1060 KBUILD_USERLDFLAGS += $(filter -m32 -m64 --ta << 
1061                                               << 
1062 # make the checker run with the right archite    920 # make the checker run with the right architecture
1063 CHECKFLAGS += --arch=$(ARCH)                     921 CHECKFLAGS += --arch=$(ARCH)
1064                                                  922 
1065 # insure the checker run with the right endia    923 # insure the checker run with the right endianness
1066 CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-    924 CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian)
1067                                                  925 
1068 # the checker needs the correct machine size     926 # the checker needs the correct machine size
1069 CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32)    927 CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32)
1070                                                  928 
1071 # Default kernel image to build when no speci    929 # Default kernel image to build when no specific target is given.
1072 # KBUILD_IMAGE may be overruled on the comman    930 # KBUILD_IMAGE may be overruled on the command line or
1073 # set in the environment                         931 # set in the environment
1074 # Also any assignments in arch/$(ARCH)/Makefi    932 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
1075 # this default value                             933 # this default value
1076 export KBUILD_IMAGE ?= vmlinux                   934 export KBUILD_IMAGE ?= vmlinux
1077                                                  935 
1078 #                                                936 #
1079 # INSTALL_PATH specifies where to place the u    937 # INSTALL_PATH specifies where to place the updated kernel and system map
1080 # images. Default is /boot, but you can set i    938 # images. Default is /boot, but you can set it to other values
1081 export  INSTALL_PATH ?= /boot                    939 export  INSTALL_PATH ?= /boot
1082                                                  940 
1083 #                                                941 #
1084 # INSTALL_DTBS_PATH specifies a prefix for re    942 # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
1085 # Like INSTALL_MOD_PATH, it isn't defined in     943 # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
1086 # an argument if needed. Otherwise it default    944 # an argument if needed. Otherwise it defaults to the kernel install path
1087 #                                                945 #
1088 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/d    946 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
1089                                                  947 
1090 #                                                948 #
1091 # INSTALL_MOD_PATH specifies a prefix to MODL    949 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
1092 # relocations required by build roots.  This     950 # relocations required by build roots.  This is not defined in the
1093 # makefile but the argument can be passed to     951 # makefile but the argument can be passed to make if needed.
1094 #                                                952 #
1095                                                  953 
1096 MODLIB  = $(INSTALL_MOD_PATH)/lib/modules/$(K    954 MODLIB  = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
1097 export MODLIB                                    955 export MODLIB
1098                                                  956 
1099 PHONY += prepare0                             !! 957 #
                                                   >> 958 # INSTALL_MOD_STRIP, if defined, will cause modules to be
                                                   >> 959 # stripped after they are installed.  If INSTALL_MOD_STRIP is '1', then
                                                   >> 960 # the default option --strip-debug will be used.  Otherwise,
                                                   >> 961 # INSTALL_MOD_STRIP value will be used as the options to the strip command.
                                                   >> 962 
                                                   >> 963 ifdef INSTALL_MOD_STRIP
                                                   >> 964 ifeq ($(INSTALL_MOD_STRIP),1)
                                                   >> 965 mod_strip_cmd = $(STRIP) --strip-debug
                                                   >> 966 else
                                                   >> 967 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
                                                   >> 968 endif # INSTALL_MOD_STRIP=1
                                                   >> 969 else
                                                   >> 970 mod_strip_cmd = true
                                                   >> 971 endif # INSTALL_MOD_STRIP
                                                   >> 972 export mod_strip_cmd
                                                   >> 973 
                                                   >> 974 # CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
                                                   >> 975 # after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
                                                   >> 976 # or CONFIG_MODULE_COMPRESS_XZ.
                                                   >> 977 
                                                   >> 978 mod_compress_cmd = true
                                                   >> 979 ifdef CONFIG_MODULE_COMPRESS
                                                   >> 980   ifdef CONFIG_MODULE_COMPRESS_GZIP
                                                   >> 981     mod_compress_cmd = gzip -n -f
                                                   >> 982   endif # CONFIG_MODULE_COMPRESS_GZIP
                                                   >> 983   ifdef CONFIG_MODULE_COMPRESS_XZ
                                                   >> 984     mod_compress_cmd = xz -f
                                                   >> 985   endif # CONFIG_MODULE_COMPRESS_XZ
                                                   >> 986 endif # CONFIG_MODULE_COMPRESS
                                                   >> 987 export mod_compress_cmd
1100                                                  988 
1101 export extmod_prefix = $(if $(KBUILD_EXTMOD), !! 989 ifdef CONFIG_MODULE_SIG_ALL
1102 export MODORDER := $(extmod_prefix)modules.or !! 990 $(eval $(call config_filename,MODULE_SIG_KEY))
1103 export MODULES_NSDEPS := $(extmod_prefix)modu << 
1104                                                  991 
1105 ifeq ($(KBUILD_EXTMOD),)                      !! 992 mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509
                                                   >> 993 else
                                                   >> 994 mod_sign_cmd = true
                                                   >> 995 endif
                                                   >> 996 export mod_sign_cmd
1106                                                  997 
1107 build-dir       := .                          !! 998 HOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf)
1108 clean-dirs      := $(sort . Documentation \   << 
1109                      $(patsubst %/,%,$(filter << 
1110                         $(drivers-) $(libs-)) << 
1111                                               << 
1112 export ARCH_CORE        := $(core-y)          << 
1113 export ARCH_LIB         := $(filter %/, $(lib << 
1114 export ARCH_DRIVERS     := $(drivers-y) $(dri << 
1115 # Externally visible symbols (used by link-vm << 
1116                                                  999 
1117 KBUILD_VMLINUX_OBJS := ./built-in.a           !! 1000 ifdef CONFIG_STACK_VALIDATION
1118 ifdef CONFIG_MODULES                          !! 1001   has_libelf := $(call try-run,\
1119 KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a !! 1002                 echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0)
1120 KBUILD_VMLINUX_LIBS := $(filter-out %/, $(lib !! 1003   ifeq ($(has_libelf),1)
1121 else                                          !! 1004     objtool_target := tools/objtool FORCE
1122 KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, !! 1005   else
                                                   >> 1006     SKIP_STACK_VALIDATION := 1
                                                   >> 1007     export SKIP_STACK_VALIDATION
                                                   >> 1008   endif
1123 endif                                            1009 endif
1124                                                  1010 
1125 export KBUILD_VMLINUX_LIBS                    !! 1011 PHONY += prepare0
                                                   >> 1012 
                                                   >> 1013 export MODORDER := $(extmod-prefix)modules.order
                                                   >> 1014 export MODULES_NSDEPS := $(extmod-prefix)modules.nsdeps
                                                   >> 1015 
                                                   >> 1016 ifeq ($(KBUILD_EXTMOD),)
                                                   >> 1017 core-y          += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
                                                   >> 1018 
                                                   >> 1019 vmlinux-dirs    := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
                                                   >> 1020                      $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
                                                   >> 1021                      $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y)))
                                                   >> 1022 
                                                   >> 1023 vmlinux-alldirs := $(sort $(vmlinux-dirs) Documentation \
                                                   >> 1024                      $(patsubst %/,%,$(filter %/, $(init-) $(core-) \
                                                   >> 1025                         $(drivers-) $(net-) $(libs-) $(virt-))))
                                                   >> 1026 
                                                   >> 1027 build-dirs      := $(vmlinux-dirs)
                                                   >> 1028 clean-dirs      := $(vmlinux-alldirs)
                                                   >> 1029 
                                                   >> 1030 init-y          := $(patsubst %/, %/built-in.a, $(init-y))
                                                   >> 1031 core-y          := $(patsubst %/, %/built-in.a, $(core-y))
                                                   >> 1032 drivers-y       := $(patsubst %/, %/built-in.a, $(drivers-y))
                                                   >> 1033 net-y           := $(patsubst %/, %/built-in.a, $(net-y))
                                                   >> 1034 libs-y1         := $(patsubst %/, %/lib.a, $(libs-y))
                                                   >> 1035 libs-y2         := $(patsubst %/, %/built-in.a, $(filter-out %.a, $(libs-y)))
                                                   >> 1036 virt-y          := $(patsubst %/, %/built-in.a, $(virt-y))
                                                   >> 1037 
                                                   >> 1038 # Externally visible symbols (used by link-vmlinux.sh)
                                                   >> 1039 export KBUILD_VMLINUX_OBJS := $(head-y) $(init-y) $(core-y) $(libs-y2) \
                                                   >> 1040                               $(drivers-y) $(net-y) $(virt-y)
                                                   >> 1041 export KBUILD_VMLINUX_LIBS := $(libs-y1)
1126 export KBUILD_LDS          := arch/$(SRCARCH)    1042 export KBUILD_LDS          := arch/$(SRCARCH)/kernel/vmlinux.lds
                                                   >> 1043 export LDFLAGS_vmlinux
                                                   >> 1044 # used by scripts/Makefile.package
                                                   >> 1045 export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools)
1127                                                  1046 
                                                   >> 1047 vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)
                                                   >> 1048 
                                                   >> 1049 # Recurse until adjust_autoksyms.sh is satisfied
                                                   >> 1050 PHONY += autoksyms_recursive
1128 ifdef CONFIG_TRIM_UNUSED_KSYMS                   1051 ifdef CONFIG_TRIM_UNUSED_KSYMS
                                                   >> 1052 autoksyms_recursive: descend modules.order
                                                   >> 1053         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
                                                   >> 1054           "$(MAKE) -f $(srctree)/Makefile vmlinux"
                                                   >> 1055 endif
                                                   >> 1056 
1129 # For the kernel to actually contain only the    1057 # For the kernel to actually contain only the needed exported symbols,
1130 # we have to build modules as well to determi    1058 # we have to build modules as well to determine what those symbols are.
1131 KBUILD_MODULES := 1                           !! 1059 # (this can be evaluated only once include/config/auto.conf has been included)
                                                   >> 1060 ifdef CONFIG_TRIM_UNUSED_KSYMS
                                                   >> 1061   KBUILD_MODULES := 1
1132 endif                                            1062 endif
1133                                                  1063 
1134 # '$(AR) mPi' needs 'T' to workaround the bug !! 1064 autoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h)
1135 quiet_cmd_ar_vmlinux.a = AR      $@           << 
1136       cmd_ar_vmlinux.a = \                    << 
1137         rm -f $@; \                           << 
1138         $(AR) cDPrST $@ $(KBUILD_VMLINUX_OBJS << 
1139         $(AR) mPiT $$($(AR) t $@ | sed -n 1p) << 
1140                                               << 
1141 targets += vmlinux.a                          << 
1142 vmlinux.a: $(KBUILD_VMLINUX_OBJS) scripts/hea << 
1143         $(call if_changed,ar_vmlinux.a)       << 
1144                                               << 
1145 PHONY += vmlinux_o                            << 
1146 vmlinux_o: vmlinux.a $(KBUILD_VMLINUX_LIBS)   << 
1147         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1148                                                  1065 
1149 vmlinux.o modules.builtin.modinfo modules.bui !! 1066 $(autoksyms_h):
1150         @:                                    !! 1067         $(Q)mkdir -p $(dir $@)
                                                   >> 1068         $(Q)touch $@
                                                   >> 1069 
                                                   >> 1070 ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
                                                   >> 1071 
                                                   >> 1072 # Final link of vmlinux with optional arch pass after final link
                                                   >> 1073 cmd_link-vmlinux =                                                 \
                                                   >> 1074         $(CONFIG_SHELL) $< $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_vmlinux) ;    \
                                                   >> 1075         $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
1151                                                  1076 
1152 PHONY += vmlinux                              !! 1077 vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE
1153 # LDFLAGS_vmlinux in the top Makefile defines !! 1078         +$(call if_changed,link-vmlinux)
1154 # not for decompressors. LDFLAGS_vmlinux in a !! 1079 
1155 # unrelated; the decompressors just happen to !! 1080 targets := vmlinux
1156 # arch/*/boot/compressed/vmlinux.             << 
1157 # Export LDFLAGS_vmlinux only to scripts/Make << 
1158 #                                             << 
1159 # _LDFLAGS_vmlinux is a workaround for the 'p << 
1160 #   https://savannah.gnu.org/bugs/?61463      << 
1161 # For Make > 4.4, the following simple code w << 
1162 #  vmlinux: private export LDFLAGS_vmlinux := << 
1163 vmlinux: private _LDFLAGS_vmlinux := $(LDFLAG << 
1164 vmlinux: export LDFLAGS_vmlinux = $(_LDFLAGS_ << 
1165 vmlinux: vmlinux.o $(KBUILD_LDS) modpost      << 
1166         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1167                                                  1081 
1168 # The actual objects are generated when desce    1082 # The actual objects are generated when descending,
1169 # make sure no implicit rule kicks in            1083 # make sure no implicit rule kicks in
1170 $(sort $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $ !! 1084 $(sort $(vmlinux-deps)): descend ;
1171                                                  1085 
1172 ifeq ($(origin KERNELRELEASE),file)           !! 1086 filechk_kernel.release = \
1173 filechk_kernel.release = $(srctree)/scripts/s !! 1087         echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1174 else                                          << 
1175 filechk_kernel.release = echo $(KERNELRELEASE << 
1176 endif                                         << 
1177                                                  1088 
1178 # Store (new) KERNELRELEASE string in include    1089 # Store (new) KERNELRELEASE string in include/config/kernel.release
1179 include/config/kernel.release: FORCE             1090 include/config/kernel.release: FORCE
1180         $(call filechk,kernel.release)           1091         $(call filechk,kernel.release)
1181                                                  1092 
1182 # Additional helpers built in scripts/           1093 # Additional helpers built in scripts/
1183 # Carefully list dependencies so we do not tr    1094 # Carefully list dependencies so we do not try to build scripts twice
1184 # in parallel                                    1095 # in parallel
1185 PHONY += scripts                                 1096 PHONY += scripts
1186 scripts: scripts_basic scripts_dtc               1097 scripts: scripts_basic scripts_dtc
1187         $(Q)$(MAKE) $(build)=$(@)                1098         $(Q)$(MAKE) $(build)=$(@)
1188                                                  1099 
1189 # Things we need to do before we recursively     1100 # Things we need to do before we recursively start building the kernel
1190 # or the modules are listed in "prepare".        1101 # or the modules are listed in "prepare".
1191 # A multi level approach is used. prepareN is    1102 # A multi level approach is used. prepareN is processed before prepareN-1.
1192 # archprepare is used in arch Makefiles and w    1103 # archprepare is used in arch Makefiles and when processed asm symlink,
1193 # version.h and scripts_basic is processed /     1104 # version.h and scripts_basic is processed / created.
1194                                                  1105 
1195 PHONY += prepare archprepare                     1106 PHONY += prepare archprepare
1196                                                  1107 
1197 archprepare: outputmakefile archheaders archs    1108 archprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \
1198         asm-generic $(version_h) include/gene !! 1109         asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h
1199         include/generated/compile.h include/g << 
1200                                                  1110 
1201 prepare0: archprepare                            1111 prepare0: archprepare
1202         $(Q)$(MAKE) $(build)=scripts/mod         1112         $(Q)$(MAKE) $(build)=scripts/mod
1203         $(Q)$(MAKE) $(build)=. prepare        !! 1113         $(Q)$(MAKE) $(build)=.
1204                                                  1114 
1205 # All the preparing..                            1115 # All the preparing..
1206 prepare: prepare0                             !! 1116 prepare: prepare0 prepare-objtool
1207 ifdef CONFIG_RUST                             << 
1208         +$(Q)$(CONFIG_SHELL) $(srctree)/scrip << 
1209         $(Q)$(MAKE) $(build)=rust             << 
1210 endif                                         << 
1211                                               << 
1212 PHONY += remove-stale-files                   << 
1213 remove-stale-files:                           << 
1214         $(Q)$(srctree)/scripts/remove-stale-f << 
1215                                                  1117 
1216 # Support for using generic headers in asm-ge    1118 # Support for using generic headers in asm-generic
1217 asm-generic := -f $(srctree)/scripts/Makefile !! 1119 asm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj
1218                                                  1120 
1219 PHONY += asm-generic uapi-asm-generic            1121 PHONY += asm-generic uapi-asm-generic
1220 asm-generic: uapi-asm-generic                    1122 asm-generic: uapi-asm-generic
1221         $(Q)$(MAKE) $(asm-generic)=arch/$(SRC    1123         $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \
1222         generic=include/asm-generic              1124         generic=include/asm-generic
1223 uapi-asm-generic:                                1125 uapi-asm-generic:
1224         $(Q)$(MAKE) $(asm-generic)=arch/$(SRC    1126         $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \
1225         generic=include/uapi/asm-generic         1127         generic=include/uapi/asm-generic
1226                                                  1128 
                                                   >> 1129 PHONY += prepare-objtool
                                                   >> 1130 prepare-objtool: $(objtool_target)
                                                   >> 1131 ifeq ($(SKIP_STACK_VALIDATION),1)
                                                   >> 1132 ifdef CONFIG_UNWINDER_ORC
                                                   >> 1133         @echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
                                                   >> 1134         @false
                                                   >> 1135 else
                                                   >> 1136         @echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
                                                   >> 1137 endif
                                                   >> 1138 endif
                                                   >> 1139 
1227 # Generate some files                            1140 # Generate some files
1228 # -------------------------------------------    1141 # ---------------------------------------------------------------------------
1229                                                  1142 
1230 # KERNELRELEASE can change from a few differe    1143 # KERNELRELEASE can change from a few different places, meaning version.h
1231 # needs to be updated, so this check is force    1144 # needs to be updated, so this check is forced on all builds
1232                                                  1145 
1233 uts_len := 64                                    1146 uts_len := 64
1234 define filechk_utsrelease.h                      1147 define filechk_utsrelease.h
1235         if [ `echo -n "$(KERNELRELEASE)" | wc    1148         if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1236           echo '"$(KERNELRELEASE)" exceeds $(    1149           echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
1237           exit 1;                                1150           exit 1;                                                         \
1238         fi;                                      1151         fi;                                                               \
1239         echo \#define UTS_RELEASE \"$(KERNELR    1152         echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"
1240 endef                                            1153 endef
1241                                                  1154 
1242 define filechk_version.h                         1155 define filechk_version.h
1243         if [ $(SUBLEVEL) -gt 255 ]; then      !! 1156         echo \#define LINUX_VERSION_CODE $(shell                         \
1244                 echo \#define LINUX_VERSION_C !! 1157         expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
1245                 expr $(VERSION) \* 65536 + $( !! 1158         echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'
1246         else                                  << 
1247                 echo \#define LINUX_VERSION_C << 
1248                 expr $(VERSION) \* 65536 + $( << 
1249         fi;                                   << 
1250         echo '#define KERNEL_VERSION(a,b,c) ( << 
1251         ((c) > 255 ? 255 : (c)))';            << 
1252         echo \#define LINUX_VERSION_MAJOR $(V << 
1253         echo \#define LINUX_VERSION_PATCHLEVE << 
1254         echo \#define LINUX_VERSION_SUBLEVEL  << 
1255 endef                                            1159 endef
1256                                                  1160 
1257 $(version_h): private PATCHLEVEL := $(or $(PA << 
1258 $(version_h): private SUBLEVEL := $(or $(SUBL << 
1259 $(version_h): FORCE                              1161 $(version_h): FORCE
1260         $(call filechk,version.h)                1162         $(call filechk,version.h)
                                                   >> 1163         $(Q)rm -f $(old_version_h)
1261                                                  1164 
1262 include/generated/utsrelease.h: include/confi    1165 include/generated/utsrelease.h: include/config/kernel.release FORCE
1263         $(call filechk,utsrelease.h)             1166         $(call filechk,utsrelease.h)
1264                                                  1167 
1265 filechk_compile.h = $(srctree)/scripts/mkcomp << 
1266         "$(UTS_MACHINE)" "$(CONFIG_CC_VERSION << 
1267                                               << 
1268 include/generated/compile.h: FORCE            << 
1269         $(call filechk,compile.h)             << 
1270                                               << 
1271 PHONY += headerdep                               1168 PHONY += headerdep
1272 headerdep:                                       1169 headerdep:
1273         $(Q)find $(srctree)/include/ -name '*    1170         $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
1274         $(srctree)/scripts/headerdep.pl -I$(s    1171         $(srctree)/scripts/headerdep.pl -I$(srctree)/include
1275                                                  1172 
1276 # -------------------------------------------    1173 # ---------------------------------------------------------------------------
1277 # Kernel headers                                 1174 # Kernel headers
1278                                                  1175 
1279 #Default location for installed headers          1176 #Default location for installed headers
1280 export INSTALL_HDR_PATH = $(objtree)/usr         1177 export INSTALL_HDR_PATH = $(objtree)/usr
1281                                                  1178 
1282 quiet_cmd_headers_install = INSTALL $(INSTALL    1179 quiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include
1283       cmd_headers_install = \                    1180       cmd_headers_install = \
1284         mkdir -p $(INSTALL_HDR_PATH); \          1181         mkdir -p $(INSTALL_HDR_PATH); \
1285         rsync -mrl --include='*/' --include='    1182         rsync -mrl --include='*/' --include='*\.h' --exclude='*' \
1286         usr/include $(INSTALL_HDR_PATH)          1183         usr/include $(INSTALL_HDR_PATH)
1287                                                  1184 
1288 PHONY += headers_install                         1185 PHONY += headers_install
1289 headers_install: headers                         1186 headers_install: headers
1290         $(call cmd,headers_install)              1187         $(call cmd,headers_install)
1291                                                  1188 
1292 PHONY += archheaders archscripts                 1189 PHONY += archheaders archscripts
1293                                                  1190 
1294 hdr-inst := -f $(srctree)/scripts/Makefile.he    1191 hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj
1295                                                  1192 
1296 PHONY += headers                                 1193 PHONY += headers
1297 headers: $(version_h) scripts_unifdef uapi-as    1194 headers: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts
1298         $(if $(filter um, $(SRCARCH)), $(erro !! 1195         $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \
                                                   >> 1196           $(error Headers not exportable for the $(SRCARCH) architecture))
1299         $(Q)$(MAKE) $(hdr-inst)=include/uapi     1197         $(Q)$(MAKE) $(hdr-inst)=include/uapi
1300         $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARC    1198         $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi
1301                                                  1199 
                                                   >> 1200 # Deprecated. It is no-op now.
                                                   >> 1201 PHONY += headers_check
                                                   >> 1202 headers_check:
                                                   >> 1203         @:
                                                   >> 1204 
1302 ifdef CONFIG_HEADERS_INSTALL                     1205 ifdef CONFIG_HEADERS_INSTALL
1303 prepare: headers                                 1206 prepare: headers
1304 endif                                            1207 endif
1305                                                  1208 
1306 PHONY += scripts_unifdef                         1209 PHONY += scripts_unifdef
1307 scripts_unifdef: scripts_basic                   1210 scripts_unifdef: scripts_basic
1308         $(Q)$(MAKE) $(build)=scripts scripts/    1211         $(Q)$(MAKE) $(build)=scripts scripts/unifdef
1309                                                  1212 
1310 # -------------------------------------------    1213 # ---------------------------------------------------------------------------
1311 # Install                                     << 
1312                                               << 
1313 # Many distributions have the custom install  << 
1314 # If DKMS is installed, 'make install' will e << 
1315 # to this Makefile to build and install exter << 
1316 # Cancel sub_make_done so that options such a << 
1317                                               << 
1318 quiet_cmd_install = INSTALL $(INSTALL_PATH)   << 
1319       cmd_install = unset sub_make_done; $(sr << 
1320                                               << 
1321 # ------------------------------------------- << 
1322 # vDSO install                                << 
1323                                               << 
1324 PHONY += vdso_install                         << 
1325 vdso_install: export INSTALL_FILES = $(vdso-i << 
1326 vdso_install:                                 << 
1327         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1328                                               << 
1329 # ------------------------------------------- << 
1330 # Tools                                       << 
1331                                               << 
1332 ifdef CONFIG_OBJTOOL                          << 
1333 prepare: tools/objtool                        << 
1334 endif                                         << 
1335                                               << 
1336 ifdef CONFIG_BPF                              << 
1337 ifdef CONFIG_DEBUG_INFO_BTF                   << 
1338 prepare: tools/bpf/resolve_btfids             << 
1339 endif                                         << 
1340 endif                                         << 
1341                                               << 
1342 # The tools build system is not a part of Kbu << 
1343 # its own unique issues. If you need to integ << 
1344 # please consider locating that tool outside  << 
1345 # standard Kbuild "hostprogs" syntax instead  << 
1346 # here. See Documentation/kbuild/makefiles.rs << 
1347                                               << 
1348 PHONY += resolve_btfids_clean                 << 
1349                                               << 
1350 resolve_btfids_O = $(abspath $(objtree))/tool << 
1351                                               << 
1352 # tools/bpf/resolve_btfids directory might no << 
1353 # in output directory, skip its clean in that << 
1354 resolve_btfids_clean:                         << 
1355 ifneq ($(wildcard $(resolve_btfids_O)),)      << 
1356         $(Q)$(MAKE) -sC $(srctree)/tools/bpf/ << 
1357 endif                                         << 
1358                                               << 
1359 # Clear a bunch of variables before executing << 
1360 ifeq ($(quiet),silent_)                       << 
1361 tools_silent=s                                << 
1362 endif                                         << 
1363                                               << 
1364 tools/: FORCE                                 << 
1365         $(Q)mkdir -p $(objtree)/tools         << 
1366         $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(too << 
1367                                               << 
1368 tools/%: FORCE                                << 
1369         $(Q)mkdir -p $(objtree)/tools         << 
1370         $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(too << 
1371                                               << 
1372 # ------------------------------------------- << 
1373 # Kernel selftest                                1214 # Kernel selftest
1374                                                  1215 
1375 PHONY += kselftest                               1216 PHONY += kselftest
1376 kselftest: headers                            !! 1217 kselftest:
1377         $(Q)$(MAKE) -C $(srctree)/tools/testi    1218         $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests
1378                                                  1219 
1379 kselftest-%: headers FORCE                    !! 1220 kselftest-%: FORCE
1380         $(Q)$(MAKE) -C $(srctree)/tools/testi    1221         $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $*
1381                                                  1222 
1382 PHONY += kselftest-merge                         1223 PHONY += kselftest-merge
1383 kselftest-merge:                                 1224 kselftest-merge:
1384         $(if $(wildcard $(objtree)/.config),,    1225         $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
1385         $(Q)find $(srctree)/tools/testing/sel !! 1226         $(Q)find $(srctree)/tools/testing/selftests -name config | \
1386                 xargs $(srctree)/scripts/kcon !! 1227                 xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config
1387         $(Q)$(MAKE) -f $(srctree)/Makefile ol    1228         $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
1388                                                  1229 
1389 # -------------------------------------------    1230 # ---------------------------------------------------------------------------
1390 # Devicetree files                               1231 # Devicetree files
1391                                                  1232 
1392 ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/    1233 ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),)
1393 dtstree := arch/$(SRCARCH)/boot/dts              1234 dtstree := arch/$(SRCARCH)/boot/dts
1394 endif                                            1235 endif
1395                                                  1236 
1396 ifneq ($(dtstree),)                              1237 ifneq ($(dtstree),)
1397                                                  1238 
1398 %.dtb: dtbs_prepare                           !! 1239 %.dtb: include/config/kernel.release scripts_dtc
1399         $(Q)$(MAKE) $(build)=$(dtstree) $(dts << 
1400                                               << 
1401 %.dtbo: dtbs_prepare                          << 
1402         $(Q)$(MAKE) $(build)=$(dtstree) $(dts    1240         $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
1403                                                  1241 
1404 PHONY += dtbs dtbs_prepare dtbs_install dtbs_ !! 1242 PHONY += dtbs dtbs_install dtbs_check
1405 dtbs: dtbs_prepare                            !! 1243 dtbs dtbs_check: include/config/kernel.release scripts_dtc
1406         $(Q)$(MAKE) $(build)=$(dtstree) need- !! 1244         $(Q)$(MAKE) $(build)=$(dtstree)
1407                                                  1245 
1408 # include/config/kernel.release is actually n !! 1246 dtbs_check: export CHECK_DTBS=1
1409 # INSTALL_DTBS_PATH contains $(KERNELRELEASE) !! 1247 dtbs_check: dt_binding_check
1410 # dtbs_install depend on it as dtbs_install m << 
1411 dtbs_prepare: include/config/kernel.release s << 
1412                                               << 
1413 ifneq ($(filter dtbs_check, $(MAKECMDGOALS)), << 
1414 export CHECK_DTBS=y                           << 
1415 endif                                         << 
1416                                               << 
1417 ifneq ($(CHECK_DTBS),)                        << 
1418 dtbs_prepare: dt_binding_schemas              << 
1419 endif                                         << 
1420                                               << 
1421 dtbs_check: dtbs                              << 
1422                                                  1248 
1423 dtbs_install:                                    1249 dtbs_install:
1424         $(Q)$(MAKE) -f $(srctree)/scripts/Mak !! 1250         $(Q)$(MAKE) $(dtbinst)=$(dtstree)
1425                                                  1251 
1426 ifdef CONFIG_OF_EARLY_FLATTREE                   1252 ifdef CONFIG_OF_EARLY_FLATTREE
1427 all: dtbs                                        1253 all: dtbs
1428 endif                                            1254 endif
1429                                                  1255 
1430 endif                                            1256 endif
1431                                                  1257 
1432 PHONY += scripts_dtc                             1258 PHONY += scripts_dtc
1433 scripts_dtc: scripts_basic                       1259 scripts_dtc: scripts_basic
1434         $(Q)$(MAKE) $(build)=scripts/dtc         1260         $(Q)$(MAKE) $(build)=scripts/dtc
1435                                                  1261 
1436 ifneq ($(filter dt_binding_check, $(MAKECMDGO !! 1262 PHONY += dt_binding_check
1437 export CHECK_DTBS=y                           !! 1263 dt_binding_check: scripts_dtc
1438 endif                                         << 
1439                                               << 
1440 PHONY += dt_binding_check dt_binding_schemas  << 
1441 dt_binding_check: dt_binding_schemas scripts_ << 
1442         $(Q)$(MAKE) $(build)=Documentation/de << 
1443                                               << 
1444 dt_binding_schemas:                           << 
1445         $(Q)$(MAKE) $(build)=Documentation/de    1264         $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings
1446                                                  1265 
1447 PHONY += dt_compatible_check                  << 
1448 dt_compatible_check: dt_binding_schemas       << 
1449         $(Q)$(MAKE) $(build)=Documentation/de << 
1450                                               << 
1451 # -------------------------------------------    1266 # ---------------------------------------------------------------------------
1452 # Modules                                        1267 # Modules
1453                                                  1268 
1454 ifdef CONFIG_MODULES                             1269 ifdef CONFIG_MODULES
1455                                                  1270 
1456 # By default, build modules as well              1271 # By default, build modules as well
1457                                                  1272 
1458 all: modules                                     1273 all: modules
1459                                                  1274 
1460 # When we're building modules with modversion << 
1461 # the built-in objects during the descend as  << 
1462 # make sure the checksums are up to date befo << 
1463 ifdef CONFIG_MODVERSIONS                      << 
1464   KBUILD_BUILTIN := 1                         << 
1465 endif                                         << 
1466                                               << 
1467 # Build modules                                  1275 # Build modules
1468 #                                                1276 #
                                                   >> 1277 # A module can be listed more than once in obj-m resulting in
                                                   >> 1278 # duplicate lines in modules.order files.  Those are removed
                                                   >> 1279 # using awk while concatenating to the final file.
1469                                                  1280 
1470 # *.ko are usually independent of vmlinux, bu !! 1281 PHONY += modules
1471 # is an exception.                            !! 1282 modules: $(if $(KBUILD_BUILTIN),vmlinux) modules.order modules.builtin
1472 ifdef CONFIG_DEBUG_INFO_BTF_MODULES           !! 1283         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1473 KBUILD_BUILTIN := 1                           !! 1284         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh
1474 modules: vmlinux                              !! 1285 
1475 endif                                         !! 1286 modules.order: descend
                                                   >> 1287         $(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(build-dirs)) > $@
1476                                                  1288 
1477 modules: modules_prepare                      !! 1289 modbuiltin-dirs := $(addprefix _modbuiltin_, $(build-dirs))
                                                   >> 1290 
                                                   >> 1291 modules.builtin: $(modbuiltin-dirs)
                                                   >> 1292         $(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(build-dirs)) > $@
                                                   >> 1293 
                                                   >> 1294 PHONY += $(modbuiltin-dirs)
                                                   >> 1295 # tristate.conf is not included from this Makefile. Add it as a prerequisite
                                                   >> 1296 # here to make it self-healing in case somebody accidentally removes it.
                                                   >> 1297 $(modbuiltin-dirs): include/config/tristate.conf
                                                   >> 1298         $(Q)$(MAKE) $(modbuiltin)=$(patsubst _modbuiltin_%,%,$@)
1478                                                  1299 
1479 # Target to prepare building external modules    1300 # Target to prepare building external modules
                                                   >> 1301 PHONY += modules_prepare
1480 modules_prepare: prepare                         1302 modules_prepare: prepare
1481         $(Q)$(MAKE) $(build)=scripts scripts/ !! 1303 
                                                   >> 1304 # Target to install modules
                                                   >> 1305 PHONY += modules_install
                                                   >> 1306 modules_install: _modinst_ _modinst_post
                                                   >> 1307 
                                                   >> 1308 PHONY += _modinst_
                                                   >> 1309 _modinst_:
                                                   >> 1310         @rm -rf $(MODLIB)/kernel
                                                   >> 1311         @rm -f $(MODLIB)/source
                                                   >> 1312         @mkdir -p $(MODLIB)/kernel
                                                   >> 1313         @ln -s $(abspath $(srctree)) $(MODLIB)/source
                                                   >> 1314         @if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
                                                   >> 1315                 rm -f $(MODLIB)/build ; \
                                                   >> 1316                 ln -s $(CURDIR) $(MODLIB)/build ; \
                                                   >> 1317         fi
                                                   >> 1318         @sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order
                                                   >> 1319         @sed 's:^:kernel/:' modules.builtin > $(MODLIB)/modules.builtin
                                                   >> 1320         @cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/
                                                   >> 1321         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
                                                   >> 1322 
                                                   >> 1323 # This depmod is only for convenience to give the initial
                                                   >> 1324 # boot a modules.dep even before / is mounted read-write.  However the
                                                   >> 1325 # boot script depmod is the master version.
                                                   >> 1326 PHONY += _modinst_post
                                                   >> 1327 _modinst_post: _modinst_
                                                   >> 1328         $(call cmd,depmod)
                                                   >> 1329 
                                                   >> 1330 ifeq ($(CONFIG_MODULE_SIG), y)
                                                   >> 1331 PHONY += modules_sign
                                                   >> 1332 modules_sign:
                                                   >> 1333         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
                                                   >> 1334 endif
                                                   >> 1335 
                                                   >> 1336 else # CONFIG_MODULES
                                                   >> 1337 
                                                   >> 1338 # Modules not configured
                                                   >> 1339 # ---------------------------------------------------------------------------
                                                   >> 1340 
                                                   >> 1341 PHONY += modules modules_install
                                                   >> 1342 modules modules_install:
                                                   >> 1343         @echo >&2
                                                   >> 1344         @echo >&2 "The present kernel configuration has modules disabled."
                                                   >> 1345         @echo >&2 "Type 'make config' and enable loadable module support."
                                                   >> 1346         @echo >&2 "Then build a kernel with module support enabled."
                                                   >> 1347         @echo >&2
                                                   >> 1348         @exit 1
1482                                                  1349 
1483 endif # CONFIG_MODULES                           1350 endif # CONFIG_MODULES
1484                                                  1351 
1485 ###                                              1352 ###
1486 # Cleaning is done on three levels.              1353 # Cleaning is done on three levels.
1487 # make clean     Delete most generated files     1354 # make clean     Delete most generated files
1488 #                Leave enough to build extern    1355 #                Leave enough to build external modules
1489 # make mrproper  Delete the current configura    1356 # make mrproper  Delete the current configuration, and all generated files
1490 # make distclean Remove editor backup files,     1357 # make distclean Remove editor backup files, patch leftover files and the like
1491                                                  1358 
1492 # Directories & files removed with 'make clea    1359 # Directories & files removed with 'make clean'
1493 CLEAN_FILES += vmlinux.symvers modules-only.s !! 1360 CLEAN_DIRS  += include/ksym
1494                modules.builtin modules.builti !! 1361 CLEAN_FILES += modules.builtin.modinfo modules.nsdeps
1495                modules.builtin.ranges vmlinux << 
1496                compile_commands.json rust/tes << 
1497                rust-project.json .vmlinux.obj << 
1498                                                  1362 
1499 # Directories & files removed with 'make mrpr    1363 # Directories & files removed with 'make mrproper'
1500 MRPROPER_FILES += include/config include/gene !! 1364 MRPROPER_DIRS  += include/config include/generated          \
1501                   arch/$(SRCARCH)/include/gen !! 1365                   arch/$(SRCARCH)/include/generated .tmp_objdiff \
1502                   debian snap tar-install PKG !! 1366                   debian/ snap/ tar-install/
1503                   .config .config.old .versio !! 1367 MRPROPER_FILES += .config .config.old .version \
1504                   Module.symvers \               1368                   Module.symvers \
1505                   certs/signing_key.pem \     !! 1369                   signing_key.pem signing_key.priv signing_key.x509     \
1506                   certs/x509.genkey \         !! 1370                   x509.genkey extra_certificates signing_key.x509.keyid \
1507                   vmlinux-gdb.py \            !! 1371                   signing_key.x509.signer vmlinux-gdb.py \
1508                   rpmbuild \                  !! 1372                   *.spec
1509                   rust/libmacros.so           !! 1373 
                                                   >> 1374 # Directories & files removed with 'make distclean'
                                                   >> 1375 DISTCLEAN_DIRS  +=
                                                   >> 1376 DISTCLEAN_FILES += tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS
1510                                                  1377 
1511 # clean - Delete most, but leave enough to bu    1378 # clean - Delete most, but leave enough to build external modules
1512 #                                                1379 #
1513 clean: private rm-files := $(CLEAN_FILES)     !! 1380 clean: rm-dirs  := $(CLEAN_DIRS)
                                                   >> 1381 clean: rm-files := $(CLEAN_FILES)
1514                                                  1382 
1515 PHONY += archclean vmlinuxclean                  1383 PHONY += archclean vmlinuxclean
1516                                                  1384 
1517 vmlinuxclean:                                    1385 vmlinuxclean:
1518         $(Q)$(CONFIG_SHELL) $(srctree)/script    1386         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1519         $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f    1387         $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
1520                                                  1388 
1521 clean: archclean vmlinuxclean resolve_btfids_ !! 1389 clean: archclean vmlinuxclean
1522                                                  1390 
1523 # mrproper - Delete all generated files, incl    1391 # mrproper - Delete all generated files, including .config
1524 #                                                1392 #
1525 mrproper: private rm-files := $(MRPROPER_FILE !! 1393 mrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
                                                   >> 1394 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1526 mrproper-dirs      := $(addprefix _mrproper_,    1395 mrproper-dirs      := $(addprefix _mrproper_,scripts)
1527                                                  1396 
1528 PHONY += $(mrproper-dirs) mrproper               1397 PHONY += $(mrproper-dirs) mrproper
1529 $(mrproper-dirs):                                1398 $(mrproper-dirs):
1530         $(Q)$(MAKE) $(clean)=$(patsubst _mrpr    1399         $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1531                                                  1400 
1532 mrproper: clean $(mrproper-dirs)                 1401 mrproper: clean $(mrproper-dirs)
                                                   >> 1402         $(call cmd,rmdirs)
1533         $(call cmd,rmfiles)                      1403         $(call cmd,rmfiles)
1534         @find . $(RCS_FIND_IGNORE) \          << 
1535                 \( -name '*.rmeta' \) \       << 
1536                 -type f -print | xargs rm -f  << 
1537                                                  1404 
1538 # distclean                                      1405 # distclean
1539 #                                                1406 #
                                                   >> 1407 distclean: rm-dirs  := $(wildcard $(DISTCLEAN_DIRS))
                                                   >> 1408 distclean: rm-files := $(wildcard $(DISTCLEAN_FILES))
                                                   >> 1409 
1540 PHONY += distclean                               1410 PHONY += distclean
1541                                                  1411 
1542 distclean: mrproper                              1412 distclean: mrproper
1543         @find . $(RCS_FIND_IGNORE) \          !! 1413         $(call cmd,rmdirs)
                                                   >> 1414         $(call cmd,rmfiles)
                                                   >> 1415         @find $(srctree) $(RCS_FIND_IGNORE) \
1544                 \( -name '*.orig' -o -name '*    1416                 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1545                 -o -name '*.bak' -o -name '#*    1417                 -o -name '*.bak' -o -name '#*#' -o -name '*%' \
1546                 -o -name 'core' -o -name tags !! 1418                 -o -name 'core' \) \
1547                 -o -name GPATH -o -name GRTAG << 
1548                 -type f -print | xargs rm -f     1419                 -type f -print | xargs rm -f
1549                                                  1420 
1550                                                  1421 
1551 # Packaging of the kernel to various formats     1422 # Packaging of the kernel to various formats
1552 # -------------------------------------------    1423 # ---------------------------------------------------------------------------
1553                                                  1424 
1554 %src-pkg: FORCE                                  1425 %src-pkg: FORCE
1555         $(Q)$(MAKE) -f $(srctree)/scripts/Mak    1426         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
1556 %pkg: include/config/kernel.release FORCE        1427 %pkg: include/config/kernel.release FORCE
1557         $(Q)$(MAKE) -f $(srctree)/scripts/Mak    1428         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
1558                                                  1429 
1559 # Brief documentation of the typical targets     1430 # Brief documentation of the typical targets used
1560 # -------------------------------------------    1431 # ---------------------------------------------------------------------------
1561                                                  1432 
1562 boards := $(wildcard $(srctree)/arch/$(SRCARC    1433 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1563 boards := $(sort $(notdir $(boards)))            1434 boards := $(sort $(notdir $(boards)))
1564 board-dirs := $(dir $(wildcard $(srctree)/arc    1435 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1565 board-dirs := $(sort $(notdir $(board-dirs:/=    1436 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1566                                                  1437 
1567 PHONY += help                                    1438 PHONY += help
1568 help:                                            1439 help:
1569         @echo  'Cleaning targets:'               1440         @echo  'Cleaning targets:'
1570         @echo  '  clean           - Remove mo    1441         @echo  '  clean           - Remove most generated files but keep the config and'
1571         @echo  '                    enough bu    1442         @echo  '                    enough build support to build external modules'
1572         @echo  '  mrproper        - Remove al    1443         @echo  '  mrproper        - Remove all generated files + config + various backup files'
1573         @echo  '  distclean       - mrproper     1444         @echo  '  distclean       - mrproper + remove editor backup and patch files'
1574         @echo  ''                                1445         @echo  ''
                                                   >> 1446         @echo  'Configuration targets:'
1575         @$(MAKE) -f $(srctree)/scripts/kconfi    1447         @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1576         @echo  ''                                1448         @echo  ''
1577         @echo  'Other generic targets:'          1449         @echo  'Other generic targets:'
1578         @echo  '  all             - Build all    1450         @echo  '  all             - Build all targets marked with [*]'
1579         @echo  '* vmlinux         - Build the    1451         @echo  '* vmlinux         - Build the bare kernel'
1580         @echo  '* modules         - Build all    1452         @echo  '* modules         - Build all modules'
1581         @echo  '  modules_install - Install a    1453         @echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1582         @echo  '  vdso_install    - Install u << 
1583         @echo  '  dir/            - Build all    1454         @echo  '  dir/            - Build all files in dir and below'
1584         @echo  '  dir/file.[ois]  - Build spe    1455         @echo  '  dir/file.[ois]  - Build specified target only'
1585         @echo  '  dir/file.ll     - Build the    1456         @echo  '  dir/file.ll     - Build the LLVM assembly file'
1586         @echo  '                    (requires    1457         @echo  '                    (requires compiler support for LLVM assembly generation)'
1587         @echo  '  dir/file.lst    - Build spe    1458         @echo  '  dir/file.lst    - Build specified mixed source/assembly target only'
1588         @echo  '                    (requires    1459         @echo  '                    (requires a recent binutils and recent build (System.map))'
1589         @echo  '  dir/file.ko     - Build mod    1460         @echo  '  dir/file.ko     - Build module including final link'
1590         @echo  '  modules_prepare - Set up fo    1461         @echo  '  modules_prepare - Set up for building external modules'
1591         @echo  '  tags/TAGS       - Generate     1462         @echo  '  tags/TAGS       - Generate tags file for editors'
1592         @echo  '  cscope          - Generate     1463         @echo  '  cscope          - Generate cscope index'
1593         @echo  '  gtags           - Generate     1464         @echo  '  gtags           - Generate GNU GLOBAL index'
1594         @echo  '  kernelrelease   - Output th    1465         @echo  '  kernelrelease   - Output the release version string (use with make -s)'
1595         @echo  '  kernelversion   - Output th    1466         @echo  '  kernelversion   - Output the version stored in Makefile (use with make -s)'
1596         @echo  '  image_name      - Output th    1467         @echo  '  image_name      - Output the image name (use with make -s)'
1597         @echo  '  headers_install - Install s    1468         @echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1598          echo  '                    (default:    1469          echo  '                    (default: $(INSTALL_HDR_PATH))'; \
1599          echo  ''                                1470          echo  ''
1600         @echo  'Static analysers:'               1471         @echo  'Static analysers:'
1601         @echo  '  checkstack      - Generate  !! 1472         @echo  '  checkstack      - Generate a list of stack hogs'
1602         @echo  '                    with a st !! 1473         @echo  '  namespacecheck  - Name space analysis on compiled kernel'
1603         @echo  '  versioncheck    - Sanity ch    1474         @echo  '  versioncheck    - Sanity check on version.h usage'
1604         @echo  '  includecheck    - Check for    1475         @echo  '  includecheck    - Check for duplicate included header files'
1605         @echo  '  export_report   - List the     1476         @echo  '  export_report   - List the usages of all exported symbols'
1606         @echo  '  headerdep       - Detect in    1477         @echo  '  headerdep       - Detect inclusion cycles in headers'
1607         @echo  '  coccicheck      - Check wit    1478         @echo  '  coccicheck      - Check with Coccinelle'
1608         @echo  '  clang-analyzer  - Check wit << 
1609         @echo  '  clang-tidy      - Check wit << 
1610         @echo  ''                                1479         @echo  ''
1611         @echo  'Tools:'                          1480         @echo  'Tools:'
1612         @echo  '  nsdeps          - Generate     1481         @echo  '  nsdeps          - Generate missing symbol namespace dependencies'
1613         @echo  ''                                1482         @echo  ''
1614         @echo  'Kernel selftest:'                1483         @echo  'Kernel selftest:'
1615         @echo  '  kselftest         - Build a !! 1484         @echo  '  kselftest       - Build and run kernel selftest (run as root)'
1616         @echo  '                      Build,  !! 1485         @echo  '                    Build, install, and boot kernel before'
1617         @echo  '                      running !! 1486         @echo  '                    running kselftest on it'
1618         @echo  '                      Run as  !! 1487         @echo  '  kselftest-clean - Remove all generated kselftest files'
1619         @echo  '  kselftest-all     - Build k !! 1488         @echo  '  kselftest-merge - Merge all the config dependencies of kselftest to existing'
1620         @echo  '  kselftest-install - Build a !! 1489         @echo  '                    .config.'
1621         @echo  '  kselftest-clean   - Remove  << 
1622         @echo  '  kselftest-merge   - Merge a << 
1623         @echo  '                      kselfte << 
1624         @echo  ''                             << 
1625         @echo  'Rust targets:'                << 
1626         @echo  '  rustavailable   - Checks wh << 
1627         @echo  '                    available << 
1628         @echo  '  rustfmt         - Reformat  << 
1629         @echo  '  rustfmtcheck    - Checks if << 
1630         @echo  '                    is format << 
1631         @echo  '  rustdoc         - Generate  << 
1632         @echo  '                    (requires << 
1633         @echo  '  rusttest        - Runs the  << 
1634         @echo  '                    (requires << 
1635         @echo  '  rust-analyzer   - Generate  << 
1636         @echo  '                    (requires << 
1637         @echo  '  dir/file.[os]   - Build spe << 
1638         @echo  '  dir/file.rsi    - Build mac << 
1639         @echo  '                    Run with  << 
1640         @echo  '                    The outpu << 
1641         @echo  '  dir/file.ll     - Build the << 
1642         @echo  ''                                1490         @echo  ''
1643         @$(if $(dtstree), \                      1491         @$(if $(dtstree), \
1644                 echo 'Devicetree:'; \            1492                 echo 'Devicetree:'; \
1645                 echo '* dtbs               -  !! 1493                 echo '* dtbs             - Build device tree blobs for enabled boards'; \
1646                 echo '  dtbs_install       -  !! 1494                 echo '  dtbs_install     - Install dtbs to $(INSTALL_DTBS_PATH)'; \
1647                 echo '  dt_binding_check   -  !! 1495                 echo '  dt_binding_check - Validate device tree binding documents'; \
1648                 echo '  dt_binding_schemas -  !! 1496                 echo '  dtbs_check       - Validate device tree source files';\
1649                 echo '  dtbs_check         -  << 
1650                 echo '')                         1497                 echo '')
1651                                                  1498 
1652         @echo 'Userspace tools targets:'         1499         @echo 'Userspace tools targets:'
1653         @echo '  use "make tools/help"'          1500         @echo '  use "make tools/help"'
1654         @echo '  or  "cd tools; make help"'      1501         @echo '  or  "cd tools; make help"'
1655         @echo  ''                                1502         @echo  ''
1656         @echo  'Kernel packaging:'               1503         @echo  'Kernel packaging:'
1657         @$(MAKE) -f $(srctree)/scripts/Makefi    1504         @$(MAKE) -f $(srctree)/scripts/Makefile.package help
1658         @echo  ''                                1505         @echo  ''
1659         @echo  'Documentation targets:'          1506         @echo  'Documentation targets:'
1660         @$(MAKE) -f $(srctree)/Documentation/    1507         @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
1661         @echo  ''                                1508         @echo  ''
1662         @echo  'Architecture-specific targets !! 1509         @echo  'Architecture specific targets ($(SRCARCH)):'
1663         @$(or $(archhelp),\                   !! 1510         @$(if $(archhelp),$(archhelp),\
1664                 echo '  No architecture-speci !! 1511                 echo '  No architecture specific help defined for $(SRCARCH)')
1665         @echo  ''                                1512         @echo  ''
1666         @$(if $(boards), \                       1513         @$(if $(boards), \
1667                 $(foreach b, $(boards), \        1514                 $(foreach b, $(boards), \
1668                 printf "  %-27s - Build for %    1515                 printf "  %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1669                 echo '')                         1516                 echo '')
1670         @$(if $(board-dirs), \                   1517         @$(if $(board-dirs), \
1671                 $(foreach b, $(board-dirs), \    1518                 $(foreach b, $(board-dirs), \
1672                 printf "  %-16s - Show %s-spe    1519                 printf "  %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1673                 printf "  %-16s - Show all of    1520                 printf "  %-16s - Show all of the above\\n" help-boards; \
1674                 echo '')                         1521                 echo '')
1675                                                  1522 
1676         @echo  '  make V=n   [targets] 1: ver !! 1523         @echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1677         @echo  '                       2: giv !! 1524         @echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
1678         @echo  '                       V=1 an << 
1679         @echo  '  make O=dir [targets] Locate    1525         @echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1680         @echo  '  make C=1   [targets] Check     1526         @echo  '  make C=1   [targets] Check re-compiled c source with $$CHECK'
1681         @echo  '                       (spars    1527         @echo  '                       (sparse by default)'
1682         @echo  '  make C=2   [targets] Force     1528         @echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1683         @echo  '  make RECORDMCOUNT_WARN=1 [t    1529         @echo  '  make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1684         @echo  '  make W=n   [targets] Enable !! 1530         @echo  '  make W=n   [targets] Enable extra build checks, n=1,2,3 where'
1685         @echo  '                1: warnings w    1531         @echo  '                1: warnings which may be relevant and do not occur too often'
1686         @echo  '                2: warnings w    1532         @echo  '                2: warnings which occur quite often but may still be relevant'
1687         @echo  '                3: more obscu    1533         @echo  '                3: more obscure warnings, can most likely be ignored'
1688         @echo  '                c: extra chec << 
1689         @echo  '                e: warnings a << 
1690         @echo  '                Multiple leve    1534         @echo  '                Multiple levels can be combined with W=12 or W=123'
1691         @$(if $(dtstree), \                   << 
1692                 echo '  make CHECK_DTBS=1 [ta << 
1693                 echo '         This can be ap << 
1694                 )                             << 
1695         @echo  ''                                1535         @echo  ''
1696         @echo  'Execute "make" or "make all"     1536         @echo  'Execute "make" or "make all" to build all targets marked with [*] '
1697         @echo  'For further info see the ./RE    1537         @echo  'For further info see the ./README file'
1698                                                  1538 
1699                                                  1539 
1700 help-board-dirs := $(addprefix help-,$(board-    1540 help-board-dirs := $(addprefix help-,$(board-dirs))
1701                                                  1541 
1702 help-boards: $(help-board-dirs)                  1542 help-boards: $(help-board-dirs)
1703                                                  1543 
1704 boards-per-dir = $(sort $(notdir $(wildcard $    1544 boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
1705                                                  1545 
1706 $(help-board-dirs): help-%:                      1546 $(help-board-dirs): help-%:
1707         @echo  'Architecture-specific targets !! 1547         @echo  'Architecture specific targets ($(SRCARCH) $*):'
1708         @$(if $(boards-per-dir), \               1548         @$(if $(boards-per-dir), \
1709                 $(foreach b, $(boards-per-dir    1549                 $(foreach b, $(boards-per-dir), \
1710                 printf "  %-24s - Build for %    1550                 printf "  %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1711                 echo '')                         1551                 echo '')
1712                                                  1552 
1713                                                  1553 
1714 # Documentation targets                          1554 # Documentation targets
1715 # -------------------------------------------    1555 # ---------------------------------------------------------------------------
1716 DOC_TARGETS := xmldocs latexdocs pdfdocs html    1556 DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
1717                linkcheckdocs dochelp refcheck !! 1557                linkcheckdocs dochelp refcheckdocs
1718 PHONY += $(DOC_TARGETS)                          1558 PHONY += $(DOC_TARGETS)
1719 $(DOC_TARGETS):                                  1559 $(DOC_TARGETS):
1720         $(Q)$(MAKE) $(build)=Documentation $@    1560         $(Q)$(MAKE) $(build)=Documentation $@
1721                                                  1561 
1722                                               << 
1723 # Rust targets                                << 
1724 # ------------------------------------------- << 
1725                                               << 
1726 # "Is Rust available?" target                 << 
1727 PHONY += rustavailable                        << 
1728 rustavailable:                                << 
1729         +$(Q)$(CONFIG_SHELL) $(srctree)/scrip << 
1730                                               << 
1731 # Documentation target                        << 
1732 #                                             << 
1733 # Using the singular to avoid running afoul o << 
1734 PHONY += rustdoc                              << 
1735 rustdoc: prepare                              << 
1736         $(Q)$(MAKE) $(build)=rust $@          << 
1737                                               << 
1738 # Testing target                              << 
1739 PHONY += rusttest                             << 
1740 rusttest: prepare                             << 
1741         $(Q)$(MAKE) $(build)=rust $@          << 
1742                                               << 
1743 # Formatting targets                          << 
1744 PHONY += rustfmt rustfmtcheck                 << 
1745                                               << 
1746 # We skip `rust/alloc` since we want to minim << 
1747 #                                             << 
1748 # We match using absolute paths since `find`  << 
1749 # when matching, which is a problem when e.g. << 
1750 # We `grep` afterwards in order to remove the << 
1751 rustfmt:                                      << 
1752         $(Q)find $(abs_srctree) -type f -name << 
1753                 -o -path $(abs_srctree)/rust/ << 
1754                 -o -path $(abs_objtree)/rust/ << 
1755                 | grep -Fv $(abs_srctree)/rus << 
1756                 | grep -Fv $(abs_objtree)/rus << 
1757                 | grep -Fv generated \        << 
1758                 | xargs $(RUSTFMT) $(rustfmt_ << 
1759                                               << 
1760 rustfmtcheck: rustfmt_flags = --check         << 
1761 rustfmtcheck: rustfmt                         << 
1762                                               << 
1763 # Misc                                           1562 # Misc
1764 # -------------------------------------------    1563 # ---------------------------------------------------------------------------
1765                                                  1564 
1766 PHONY += misc-check                           << 
1767 misc-check:                                   << 
1768         $(Q)$(srctree)/scripts/misc-check     << 
1769                                               << 
1770 all: misc-check                               << 
1771                                               << 
1772 PHONY += scripts_gdb                             1565 PHONY += scripts_gdb
1773 scripts_gdb: prepare0                            1566 scripts_gdb: prepare0
1774         $(Q)$(MAKE) $(build)=scripts/gdb         1567         $(Q)$(MAKE) $(build)=scripts/gdb
1775         $(Q)ln -fsn $(abspath $(srctree)/scri    1568         $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py)
1776                                                  1569 
1777 ifdef CONFIG_GDB_SCRIPTS                         1570 ifdef CONFIG_GDB_SCRIPTS
1778 all: scripts_gdb                                 1571 all: scripts_gdb
1779 endif                                            1572 endif
1780                                                  1573 
1781 else # KBUILD_EXTMOD                             1574 else # KBUILD_EXTMOD
1782                                                  1575 
1783 filechk_kernel.release = echo $(KERNELRELEASE << 
1784                                               << 
1785 ###                                              1576 ###
1786 # External module support.                       1577 # External module support.
1787 # When building external modules the kernel u    1578 # When building external modules the kernel used as basis is considered
1788 # read-only, and no consistency checks are ma    1579 # read-only, and no consistency checks are made and the make
1789 # system is not used on the basis kernel. If     1580 # system is not used on the basis kernel. If updates are required
1790 # in the basis kernel ordinary make commands  !! 1581 # in the basis kernel ordinary make commands (without M=...) must
                                                   >> 1582 # be used.
                                                   >> 1583 #
                                                   >> 1584 # The following are the only valid targets when building external
                                                   >> 1585 # modules.
                                                   >> 1586 # make M=dir clean     Delete all automatically generated files
                                                   >> 1587 # make M=dir modules   Make all modules in specified dir
                                                   >> 1588 # make M=dir           Same as 'make M=dir modules'
                                                   >> 1589 # make M=dir modules_install
                                                   >> 1590 #                      Install the modules built in the module directory
                                                   >> 1591 #                      Assumes install directory is already created
1791                                                  1592 
1792 # We are always building only modules.        !! 1593 # We are always building modules
1793 KBUILD_BUILTIN :=                             << 
1794 KBUILD_MODULES := 1                              1594 KBUILD_MODULES := 1
1795                                                  1595 
1796 build-dir := $(KBUILD_EXTMOD)                 !! 1596 PHONY += $(objtree)/Module.symvers
                                                   >> 1597 $(objtree)/Module.symvers:
                                                   >> 1598         @test -e $(objtree)/Module.symvers || ( \
                                                   >> 1599         echo; \
                                                   >> 1600         echo "  WARNING: Symbol version dump $(objtree)/Module.symvers"; \
                                                   >> 1601         echo "           is missing; modules will have no dependencies and modversions."; \
                                                   >> 1602         echo )
                                                   >> 1603 
                                                   >> 1604 build-dirs := $(KBUILD_EXTMOD)
                                                   >> 1605 PHONY += modules
                                                   >> 1606 modules: descend $(objtree)/Module.symvers
                                                   >> 1607         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
                                                   >> 1608 
                                                   >> 1609 PHONY += modules_install
                                                   >> 1610 modules_install: _emodinst_ _emodinst_post
1797                                                  1611 
1798 compile_commands.json: $(extmod_prefix)compil !! 1612 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1799 PHONY += compile_commands.json                !! 1613 PHONY += _emodinst_
                                                   >> 1614 _emodinst_:
                                                   >> 1615         $(Q)mkdir -p $(MODLIB)/$(install-dir)
                                                   >> 1616         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
                                                   >> 1617 
                                                   >> 1618 PHONY += _emodinst_post
                                                   >> 1619 _emodinst_post: _emodinst_
                                                   >> 1620         $(call cmd,depmod)
1800                                                  1621 
1801 clean-dirs := $(KBUILD_EXTMOD)                   1622 clean-dirs := $(KBUILD_EXTMOD)
1802 clean: private rm-files := $(KBUILD_EXTMOD)/M !! 1623 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps
1803         $(KBUILD_EXTMOD)/compile_commands.jso << 
1804                                                  1624 
1805 PHONY += prepare                              !! 1625 PHONY += /
1806 # now expand this into a simple variable to r !! 1626 /:
1807 prepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT !! 1627         @echo >&2 '"$(MAKE) /" is no longer supported. Please use "$(MAKE) ./" instead.'
1808 prepare:                                      << 
1809         @if [ "$(CC_VERSION_TEXT)" != "$(CONF << 
1810                 echo >&2 "warning: the compil << 
1811                 echo >&2 "  The kernel was bu << 
1812                 echo >&2 "  You are using:    << 
1813         fi                                    << 
1814                                                  1628 
1815 PHONY += help                                    1629 PHONY += help
1816 help:                                            1630 help:
1817         @echo  '  Building external modules.'    1631         @echo  '  Building external modules.'
1818         @echo  '  Syntax: make -C path/to/ker    1632         @echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
1819         @echo  ''                                1633         @echo  ''
1820         @echo  '  modules         - default t    1634         @echo  '  modules         - default target, build the module(s)'
1821         @echo  '  modules_install - install t    1635         @echo  '  modules_install - install the module'
1822         @echo  '  clean           - remove ge    1636         @echo  '  clean           - remove generated files in module directory only'
1823         @echo  '  rust-analyzer   - generate  << 
1824         @echo  ''                                1637         @echo  ''
1825                                                  1638 
1826 ifndef CONFIG_MODULES                         !! 1639 PHONY += prepare
1827 modules modules_install: __external_modules_e << 
1828 __external_modules_error:                     << 
1829         @echo >&2 '***'                       << 
1830         @echo >&2 '*** The present kernel dis << 
1831         @echo >&2 '*** You cannot build or in << 
1832         @echo >&2 '***'                       << 
1833         @false                                << 
1834 endif                                         << 
1835                                               << 
1836 endif # KBUILD_EXTMOD                            1640 endif # KBUILD_EXTMOD
1837                                                  1641 
1838 # ------------------------------------------- << 
1839 # Modules                                     << 
1840                                               << 
1841 PHONY += modules modules_install modules_sign << 
1842                                               << 
1843 modules_install:                              << 
1844         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1845         sign-only=$(if $(filter modules_insta << 
1846                                               << 
1847 ifeq ($(CONFIG_MODULE_SIG),y)                 << 
1848 # modules_sign is a subset of modules_install << 
1849 # 'make modules_install modules_sign' is equi << 
1850 modules_sign: modules_install                 << 
1851         @:                                    << 
1852 else                                          << 
1853 modules_sign:                                 << 
1854         @echo >&2 '***'                       << 
1855         @echo >&2 '*** CONFIG_MODULE_SIG is d << 
1856         @echo >&2 '***'                       << 
1857         @false                                << 
1858 endif                                         << 
1859                                               << 
1860 ifdef CONFIG_MODULES                          << 
1861                                               << 
1862 $(MODORDER): $(build-dir)                     << 
1863         @:                                    << 
1864                                               << 
1865 # KBUILD_MODPOST_NOFINAL can be set to skip t << 
1866 # This is solely useful to speed up test comp << 
1867 modules: modpost                              << 
1868 ifneq ($(KBUILD_MODPOST_NOFINAL),1)           << 
1869         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1870 endif                                         << 
1871                                               << 
1872 PHONY += modules_check                        << 
1873 modules_check: $(MODORDER)                    << 
1874         $(Q)$(CONFIG_SHELL) $(srctree)/script << 
1875                                               << 
1876 else # CONFIG_MODULES                         << 
1877                                               << 
1878 modules:                                      << 
1879         @:                                    << 
1880                                               << 
1881 KBUILD_MODULES :=                             << 
1882                                               << 
1883 endif # CONFIG_MODULES                        << 
1884                                               << 
1885 PHONY += modpost                              << 
1886 modpost: $(if $(single-build),, $(if $(KBUILD << 
1887          $(if $(KBUILD_MODULES), modules_chec << 
1888         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1889                                               << 
1890 # Single targets                                 1642 # Single targets
1891 # -------------------------------------------    1643 # ---------------------------------------------------------------------------
1892 # To build individual files in subdirectories    1644 # To build individual files in subdirectories, you can do like this:
1893 #                                                1645 #
1894 #   make foo/bar/baz.s                           1646 #   make foo/bar/baz.s
1895 #                                                1647 #
1896 # The supported suffixes for single-target ar    1648 # The supported suffixes for single-target are listed in 'single-targets'
1897 #                                                1649 #
1898 # To build only under specific subdirectories    1650 # To build only under specific subdirectories, you can do like this:
1899 #                                                1651 #
1900 #   make foo/bar/baz/                            1652 #   make foo/bar/baz/
1901                                                  1653 
1902 ifdef single-build                               1654 ifdef single-build
1903                                                  1655 
1904 # .ko is special because modpost is needed       1656 # .ko is special because modpost is needed
1905 single-ko := $(sort $(filter %.ko, $(MAKECMDG    1657 single-ko := $(sort $(filter %.ko, $(MAKECMDGOALS)))
1906 single-no-ko := $(filter-out $(single-ko), $( !! 1658 single-no-ko := $(sort $(patsubst %.ko,%.mod, $(MAKECMDGOALS)))
1907                 $(foreach x, o mod, $(patsubs << 
1908                                                  1659 
1909 $(single-ko): single_modules                  !! 1660 $(single-ko): single_modpost
1910         @:                                       1661         @:
1911 $(single-no-ko): $(build-dir)                 !! 1662 $(single-no-ko): descend
1912         @:                                       1663         @:
1913                                                  1664 
1914 # Remove MODORDER when done because it is not !! 1665 ifeq ($(KBUILD_EXTMOD),)
1915 PHONY += single_modules                       !! 1666 # For the single build of in-tree modules, use a temporary file to avoid
1916 single_modules: $(single-no-ko) modules_prepa !! 1667 # the situation of modules_install installing an invalid modules.order.
1917         $(Q){ $(foreach m, $(single-ko), echo !! 1668 MODORDER := .modules.tmp
1918         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1919 ifneq ($(KBUILD_MODPOST_NOFINAL),1)           << 
1920         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1921 endif                                            1669 endif
1922         $(Q)rm -f $(MODORDER)                 << 
1923                                                  1670 
1924 single-goals := $(addprefix $(build-dir)/, $( !! 1671 PHONY += single_modpost
                                                   >> 1672 single_modpost: $(single-no-ko)
                                                   >> 1673         $(Q){ $(foreach m, $(single-ko), echo $(extmod-prefix)$m;) } > $(MODORDER)
                                                   >> 1674         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1925                                                  1675 
1926 KBUILD_MODULES := 1                              1676 KBUILD_MODULES := 1
1927                                                  1677 
                                                   >> 1678 export KBUILD_SINGLE_TARGETS := $(addprefix $(extmod-prefix), $(single-no-ko))
                                                   >> 1679 
                                                   >> 1680 # trim unrelated directories
                                                   >> 1681 build-dirs := $(foreach d, $(build-dirs), \
                                                   >> 1682                         $(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d)))
                                                   >> 1683 
1928 endif                                            1684 endif
1929                                                  1685 
                                                   >> 1686 # Handle descending into subdirectories listed in $(build-dirs)
1930 # Preset locale variables to speed up the bui    1687 # Preset locale variables to speed up the build process. Limit locale
1931 # tweaks to this spot to avoid wrong language    1688 # tweaks to this spot to avoid wrong language settings when running
1932 # make menuconfig etc.                           1689 # make menuconfig etc.
1933 # Error messages still appears in the origina    1690 # Error messages still appears in the original language
1934 PHONY += $(build-dir)                         !! 1691 PHONY += descend $(build-dirs)
1935 $(build-dir): prepare                         !! 1692 descend: $(build-dirs)
1936         $(Q)$(MAKE) $(build)=$@ need-builtin= !! 1693 $(build-dirs): prepare
                                                   >> 1694         $(Q)$(MAKE) $(build)=$@ \
                                                   >> 1695         single-build=$(if $(filter-out $@/, $(filter $@/%, $(single-no-ko))),1) \
                                                   >> 1696         need-builtin=1 need-modorder=1
1937                                                  1697 
1938 clean-dirs := $(addprefix _clean_, $(clean-di    1698 clean-dirs := $(addprefix _clean_, $(clean-dirs))
1939 PHONY += $(clean-dirs) clean                     1699 PHONY += $(clean-dirs) clean
1940 $(clean-dirs):                                   1700 $(clean-dirs):
1941         $(Q)$(MAKE) $(clean)=$(patsubst _clea    1701         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1942                                                  1702 
1943 clean: $(clean-dirs)                             1703 clean: $(clean-dirs)
                                                   >> 1704         $(call cmd,rmdirs)
1944         $(call cmd,rmfiles)                      1705         $(call cmd,rmfiles)
1945         @find $(or $(KBUILD_EXTMOD), .) $(RCS !! 1706         @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1946                 \( -name '*.[aios]' -o -name  !! 1707                 \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \
1947                 -o -name '*.ko.*' \              1708                 -o -name '*.ko.*' \
1948                 -o -name '*.dtb' -o -name '*. !! 1709                 -o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \
1949                 -o -name '*.dtb.S' -o -name ' << 
1950                 -o -name '*.dt.yaml' -o -name << 
1951                 -o -name '*.dwo' -o -name '*.    1710                 -o -name '*.dwo' -o -name '*.lst' \
1952                 -o -name '*.su' -o -name '*.m    1711                 -o -name '*.su' -o -name '*.mod' \
1953                 -o -name '.*.d' -o -name '.*.    1712                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1954                 -o -name '*.lex.c' -o -name '    1713                 -o -name '*.lex.c' -o -name '*.tab.[ch]' \
1955                 -o -name '*.asn1.[ch]' \         1714                 -o -name '*.asn1.[ch]' \
1956                 -o -name '*.symtypes' -o -nam    1715                 -o -name '*.symtypes' -o -name 'modules.order' \
                                                   >> 1716                 -o -name modules.builtin -o -name '.tmp_*.o.*' \
1957                 -o -name '*.c.[012]*.*' \        1717                 -o -name '*.c.[012]*.*' \
1958                 -o -name '*.ll' \                1718                 -o -name '*.ll' \
1959                 -o -name '*.gcno' \           !! 1719                 -o -name '*.gcno' \) -type f -print | xargs rm -f
1960                 \) -type f -print \           << 
1961                 -o -name '.tmp_*' -print \    << 
1962                 | xargs rm -rf                << 
1963                                                  1720 
1964 # Generate tags for editors                      1721 # Generate tags for editors
1965 # -------------------------------------------    1722 # ---------------------------------------------------------------------------
1966 quiet_cmd_tags = GEN     $@                      1723 quiet_cmd_tags = GEN     $@
1967       cmd_tags = $(BASH) $(srctree)/scripts/t    1724       cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@
1968                                                  1725 
1969 tags TAGS cscope gtags: FORCE                    1726 tags TAGS cscope gtags: FORCE
1970         $(call cmd,tags)                         1727         $(call cmd,tags)
1971                                                  1728 
1972 # Generate rust-project.json (a file that des << 
1973 # Rust projects) for rust-analyzer (an implem << 
1974 # Protocol).                                  << 
1975 PHONY += rust-analyzer                        << 
1976 rust-analyzer:                                << 
1977         +$(Q)$(CONFIG_SHELL) $(srctree)/scrip << 
1978         $(Q)$(MAKE) $(build)=rust $@          << 
1979                                               << 
1980 # Script to generate missing namespace depend    1729 # Script to generate missing namespace dependencies
1981 # -------------------------------------------    1730 # ---------------------------------------------------------------------------
1982                                                  1731 
1983 PHONY += nsdeps                                  1732 PHONY += nsdeps
1984 nsdeps: export KBUILD_NSDEPS=1                   1733 nsdeps: export KBUILD_NSDEPS=1
1985 nsdeps: modules                                  1734 nsdeps: modules
1986         $(Q)$(CONFIG_SHELL) $(srctree)/script    1735         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps
1987                                                  1736 
1988 # Clang Tooling                               << 
1989 # ------------------------------------------- << 
1990                                               << 
1991 quiet_cmd_gen_compile_commands = GEN     $@   << 
1992       cmd_gen_compile_commands = $(PYTHON3) $ << 
1993                                               << 
1994 $(extmod_prefix)compile_commands.json: $(srct << 
1995         $(if $(KBUILD_EXTMOD),, vmlinux.a $(K << 
1996         $(if $(CONFIG_MODULES), $(MODORDER))  << 
1997         $(call if_changed,gen_compile_command << 
1998                                               << 
1999 targets += $(extmod_prefix)compile_commands.j << 
2000                                               << 
2001 PHONY += clang-tidy clang-analyzer            << 
2002                                               << 
2003 ifdef CONFIG_CC_IS_CLANG                      << 
2004 quiet_cmd_clang_tools = CHECK   $<            << 
2005       cmd_clang_tools = $(PYTHON3) $(srctree) << 
2006                                               << 
2007 clang-tidy clang-analyzer: $(extmod_prefix)co << 
2008         $(call cmd,clang_tools)               << 
2009 else                                          << 
2010 clang-tidy clang-analyzer:                    << 
2011         @echo "$@ requires CC=clang" >&2      << 
2012         @false                                << 
2013 endif                                         << 
2014                                               << 
2015 # Scripts to check various things for consist    1737 # Scripts to check various things for consistency
2016 # -------------------------------------------    1738 # ---------------------------------------------------------------------------
2017                                                  1739 
2018 PHONY += includecheck versioncheck coccicheck !! 1740 PHONY += includecheck versioncheck coccicheck namespacecheck export_report
2019                                                  1741 
2020 includecheck:                                    1742 includecheck:
2021         find $(srctree)/* $(RCS_FIND_IGNORE)     1743         find $(srctree)/* $(RCS_FIND_IGNORE) \
2022                 -name '*.[hcS]' -type f -prin    1744                 -name '*.[hcS]' -type f -print | sort \
2023                 | xargs $(PERL) -w $(srctree)    1745                 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
2024                                                  1746 
2025 versioncheck:                                    1747 versioncheck:
2026         find $(srctree)/* $(RCS_FIND_IGNORE)     1748         find $(srctree)/* $(RCS_FIND_IGNORE) \
2027                 -name '*.[hcS]' -type f -prin    1749                 -name '*.[hcS]' -type f -print | sort \
2028                 | xargs $(PERL) -w $(srctree)    1750                 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
2029                                                  1751 
2030 coccicheck:                                      1752 coccicheck:
2031         $(Q)$(BASH) $(srctree)/scripts/$@        1753         $(Q)$(BASH) $(srctree)/scripts/$@
2032                                                  1754 
                                                   >> 1755 namespacecheck:
                                                   >> 1756         $(PERL) $(srctree)/scripts/namespace.pl
                                                   >> 1757 
2033 export_report:                                   1758 export_report:
2034         $(PERL) $(srctree)/scripts/export_rep    1759         $(PERL) $(srctree)/scripts/export_report.pl
2035                                                  1760 
2036 PHONY += checkstack kernelrelease kernelversi    1761 PHONY += checkstack kernelrelease kernelversion image_name
2037                                                  1762 
2038 # UML needs a little special treatment here.     1763 # UML needs a little special treatment here.  It wants to use the host
2039 # toolchain, so needs $(SUBARCH) passed to ch    1764 # toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
2040 # else wants $(ARCH), including people doing     1765 # else wants $(ARCH), including people doing cross-builds, which means
2041 # that $(SUBARCH) doesn't work here.             1766 # that $(SUBARCH) doesn't work here.
2042 ifeq ($(ARCH), um)                               1767 ifeq ($(ARCH), um)
2043 CHECKSTACK_ARCH := $(SUBARCH)                    1768 CHECKSTACK_ARCH := $(SUBARCH)
2044 else                                             1769 else
2045 CHECKSTACK_ARCH := $(ARCH)                       1770 CHECKSTACK_ARCH := $(ARCH)
2046 endif                                            1771 endif
2047 MINSTACKSIZE    ?= 100                        << 
2048 checkstack:                                      1772 checkstack:
2049         $(OBJDUMP) -d vmlinux $$(find . -name    1773         $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
2050         $(PERL) $(srctree)/scripts/checkstack !! 1774         $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
2051                                                  1775 
2052 kernelrelease:                                   1776 kernelrelease:
2053         @$(filechk_kernel.release)            !! 1777         @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
2054                                                  1778 
2055 kernelversion:                                   1779 kernelversion:
2056         @echo $(KERNELVERSION)                   1780         @echo $(KERNELVERSION)
2057                                                  1781 
2058 image_name:                                      1782 image_name:
2059         @echo $(KBUILD_IMAGE)                    1783         @echo $(KBUILD_IMAGE)
2060                                                  1784 
2061 PHONY += run-command                          !! 1785 # Clear a bunch of variables before executing the submake
2062 run-command:                                  !! 1786 
2063         $(Q)$(KBUILD_RUN_COMMAND)             !! 1787 ifeq ($(quiet),silent_)
                                                   >> 1788 tools_silent=s
                                                   >> 1789 endif
                                                   >> 1790 
                                                   >> 1791 tools/: FORCE
                                                   >> 1792         $(Q)mkdir -p $(objtree)/tools
                                                   >> 1793         $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/
                                                   >> 1794 
                                                   >> 1795 tools/%: FORCE
                                                   >> 1796         $(Q)mkdir -p $(objtree)/tools
                                                   >> 1797         $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $*
                                                   >> 1798 
                                                   >> 1799 # FIXME Should go into a make.lib or something
                                                   >> 1800 # ===========================================================================
                                                   >> 1801 
                                                   >> 1802 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
                                                   >> 1803       cmd_rmdirs = rm -rf $(rm-dirs)
2064                                                  1804 
2065 quiet_cmd_rmfiles = $(if $(wildcard $(rm-file    1805 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
2066       cmd_rmfiles = rm -rf $(rm-files)        !! 1806       cmd_rmfiles = rm -f $(rm-files)
                                                   >> 1807 
                                                   >> 1808 # Run depmod only if we have System.map and depmod is executable
                                                   >> 1809 quiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
                                                   >> 1810       cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
                                                   >> 1811                    $(KERNELRELEASE)
2067                                                  1812 
2068 # read saved command lines for existing targe    1813 # read saved command lines for existing targets
2069 existing-targets := $(wildcard $(sort $(targe    1814 existing-targets := $(wildcard $(sort $(targets)))
2070                                                  1815 
2071 -include $(foreach f,$(existing-targets),$(di    1816 -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
2072                                                  1817 
2073 endif # config-build                          !! 1818 endif # config-targets
2074 endif # mixed-build                              1819 endif # mixed-build
2075 endif # need-sub-make                            1820 endif # need-sub-make
2076                                                  1821 
2077 PHONY += FORCE                                   1822 PHONY += FORCE
2078 FORCE:                                           1823 FORCE:
2079                                                  1824 
2080 # Declare the contents of the PHONY variable     1825 # Declare the contents of the PHONY variable as phony.  We keep that
2081 # information in a variable so we can use it     1826 # information in a variable so we can use it in if_changed and friends.
2082 .PHONY: $(PHONY)                                 1827 .PHONY: $(PHONY)
                                                      

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