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TOMOYO Linux Cross Reference
Linux/Makefile

Version: ~ [ linux-6.11.5 ] ~ [ linux-6.10.14 ] ~ [ linux-6.9.12 ] ~ [ linux-6.8.12 ] ~ [ linux-6.7.12 ] ~ [ linux-6.6.58 ] ~ [ linux-6.5.13 ] ~ [ linux-6.4.16 ] ~ [ linux-6.3.13 ] ~ [ linux-6.2.16 ] ~ [ linux-6.1.114 ] ~ [ linux-6.0.19 ] ~ [ linux-5.19.17 ] ~ [ linux-5.18.19 ] ~ [ linux-5.17.15 ] ~ [ linux-5.16.20 ] ~ [ linux-5.15.169 ] ~ [ linux-5.14.21 ] ~ [ linux-5.13.19 ] ~ [ linux-5.12.19 ] ~ [ linux-5.11.22 ] ~ [ linux-5.10.228 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.284 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.322 ] ~ [ 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-1.8.9 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

Diff markup

Differences between /Makefile (Architecture m68k) and /Makefile (Architecture i386)


  1 # SPDX-License-Identifier: GPL-2.0                  1 # SPDX-License-Identifier: GPL-2.0
  2 VERSION = 6                                         2 VERSION = 6
  3 PATCHLEVEL = 11                                     3 PATCHLEVEL = 11
  4 SUBLEVEL = 5                                        4 SUBLEVEL = 5
  5 EXTRAVERSION =                                      5 EXTRAVERSION =
  6 NAME = Baby Opossum Posse                           6 NAME = Baby Opossum Posse
  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)),)         14 ifeq ($(filter output-sync,$(.FEATURES)),)
 15 $(error GNU Make >= 4.0 is required. Your Make     15 $(error GNU Make >= 4.0 is required. Your Make version is $(MAKE_VERSION))
 16 endif                                              16 endif
 17                                                    17 
 18 $(if $(filter __%, $(MAKECMDGOALS)), \             18 $(if $(filter __%, $(MAKECMDGOALS)), \
 19         $(error targets prefixed with '__' are     19         $(error targets prefixed with '__' are only for internal use))
 20                                                    20 
 21 # That's our default target when none is given     21 # That's our default target when none is given on the command line
 22 PHONY := __all                                     22 PHONY := __all
 23 __all:                                             23 __all:
 24                                                    24 
 25 # We are using a recursive build, so we need t     25 # We are using a recursive build, so we need to do a little thinking
 26 # to get the ordering right.                       26 # to get the ordering right.
 27 #                                                  27 #
 28 # Most importantly: sub-Makefiles should only      28 # Most importantly: sub-Makefiles should only ever modify files in
 29 # their own directory. If in some directory we     29 # their own directory. If in some directory we have a dependency on
 30 # a file in another dir (which doesn't happen      30 # a file in another dir (which doesn't happen often, but it's often
 31 # unavoidable when linking the built-in.a targ     31 # unavoidable when linking the built-in.a targets which finally
 32 # turn into vmlinux), we will call a sub make      32 # turn into vmlinux), we will call a sub make in that other dir, and
 33 # after that we are sure that everything which     33 # after that we are sure that everything which is in that other dir
 34 # is now up to date.                               34 # is now up to date.
 35 #                                                  35 #
 36 # The only cases where we need to modify files     36 # The only cases where we need to modify files which have global
 37 # effects are thus separated out and done befo     37 # effects are thus separated out and done before the recursive
 38 # descending is started. They are now explicit     38 # descending is started. They are now explicitly listed as the
 39 # prepare rule.                                    39 # prepare rule.
 40                                                    40 
 41 this-makefile := $(lastword $(MAKEFILE_LIST))      41 this-makefile := $(lastword $(MAKEFILE_LIST))
 42 abs_srctree := $(realpath $(dir $(this-makefil     42 abs_srctree := $(realpath $(dir $(this-makefile)))
 43 abs_objtree := $(CURDIR)                           43 abs_objtree := $(CURDIR)
 44                                                    44 
 45 ifneq ($(sub_make_done),1)                         45 ifneq ($(sub_make_done),1)
 46                                                    46 
 47 # Do not use make's built-in rules and variabl     47 # Do not use make's built-in rules and variables
 48 # (this increases performance and avoids hard-     48 # (this increases performance and avoids hard-to-debug behaviour)
 49 MAKEFLAGS += -rR                                   49 MAKEFLAGS += -rR
 50                                                    50 
 51 # Avoid funny character set dependencies           51 # Avoid funny character set dependencies
 52 unexport LC_ALL                                    52 unexport LC_ALL
 53 LC_COLLATE=C                                       53 LC_COLLATE=C
 54 LC_NUMERIC=C                                       54 LC_NUMERIC=C
 55 export LC_COLLATE LC_NUMERIC                       55 export LC_COLLATE LC_NUMERIC
 56                                                    56 
 57 # Avoid interference with shell env settings       57 # Avoid interference with shell env settings
 58 unexport GREP_OPTIONS                              58 unexport GREP_OPTIONS
 59                                                    59 
 60 # Beautify output                                  60 # Beautify output
 61 # --------------------------------------------     61 # ---------------------------------------------------------------------------
 62 #                                                  62 #
 63 # Most of build commands in Kbuild start with      63 # Most of build commands in Kbuild start with "cmd_". You can optionally define
 64 # "quiet_cmd_*". If defined, the short log is      64 # "quiet_cmd_*". If defined, the short log is printed. Otherwise, no log from
 65 # that command is printed by default.              65 # that command is printed by default.
 66 #                                                  66 #
 67 # e.g.)                                            67 # e.g.)
 68 #    quiet_cmd_depmod = DEPMOD  $(MODLIB)          68 #    quiet_cmd_depmod = DEPMOD  $(MODLIB)
 69 #          cmd_depmod = $(srctree)/scripts/dep     69 #          cmd_depmod = $(srctree)/scripts/depmod.sh $(DEPMOD) $(KERNELRELEASE)
 70 #                                                  70 #
 71 # A simple variant is to prefix commands with      71 # A simple variant is to prefix commands with $(Q) - that's useful
 72 # for commands that shall be hidden in non-ver     72 # for commands that shall be hidden in non-verbose mode.
 73 #                                                  73 #
 74 #    $(Q)$(MAKE) $(build)=scripts/basic            74 #    $(Q)$(MAKE) $(build)=scripts/basic
 75 #                                                  75 #
 76 # If KBUILD_VERBOSE contains 1, the whole comm     76 # If KBUILD_VERBOSE contains 1, the whole command is echoed.
 77 # If KBUILD_VERBOSE contains 2, the reason for     77 # If KBUILD_VERBOSE contains 2, the reason for rebuilding is printed.
 78 #                                                  78 #
 79 # To put more focus on warnings, be less verbo     79 # To put more focus on warnings, be less verbose as default
 80 # Use 'make V=1' to see the full commands          80 # Use 'make V=1' to see the full commands
 81                                                    81 
 82 ifeq ("$(origin V)", "command line")               82 ifeq ("$(origin V)", "command line")
 83   KBUILD_VERBOSE = $(V)                            83   KBUILD_VERBOSE = $(V)
 84 endif                                              84 endif
 85                                                    85 
 86 quiet = quiet_                                     86 quiet = quiet_
 87 Q = @                                              87 Q = @
 88                                                    88 
 89 ifneq ($(findstring 1, $(KBUILD_VERBOSE)),)        89 ifneq ($(findstring 1, $(KBUILD_VERBOSE)),)
 90   quiet =                                          90   quiet =
 91   Q =                                              91   Q =
 92 endif                                              92 endif
 93                                                    93 
 94 # If the user is running make -s (silent mode)     94 # If the user is running make -s (silent mode), suppress echoing of
 95 # commands                                         95 # commands
 96 ifneq ($(findstring s,$(firstword -$(MAKEFLAGS     96 ifneq ($(findstring s,$(firstword -$(MAKEFLAGS))),)
 97 quiet=silent_                                      97 quiet=silent_
 98 override KBUILD_VERBOSE :=                         98 override KBUILD_VERBOSE :=
 99 endif                                              99 endif
100                                                   100 
101 export quiet Q KBUILD_VERBOSE                     101 export quiet Q KBUILD_VERBOSE
102                                                   102 
103 # Call a source code checker (by default, "spa    103 # Call a source code checker (by default, "sparse") as part of the
104 # C compilation.                                  104 # C compilation.
105 #                                                 105 #
106 # Use 'make C=1' to enable checking of only re    106 # Use 'make C=1' to enable checking of only re-compiled files.
107 # Use 'make C=2' to enable checking of *all* s    107 # Use 'make C=2' to enable checking of *all* source files, regardless
108 # of whether they are re-compiled or not.         108 # of whether they are re-compiled or not.
109 #                                                 109 #
110 # See the file "Documentation/dev-tools/sparse    110 # See the file "Documentation/dev-tools/sparse.rst" for more details,
111 # including where to get the "sparse" utility.    111 # including where to get the "sparse" utility.
112                                                   112 
113 ifeq ("$(origin C)", "command line")              113 ifeq ("$(origin C)", "command line")
114   KBUILD_CHECKSRC = $(C)                          114   KBUILD_CHECKSRC = $(C)
115 endif                                             115 endif
116 ifndef KBUILD_CHECKSRC                            116 ifndef KBUILD_CHECKSRC
117   KBUILD_CHECKSRC = 0                             117   KBUILD_CHECKSRC = 0
118 endif                                             118 endif
119                                                   119 
120 export KBUILD_CHECKSRC                            120 export KBUILD_CHECKSRC
121                                                   121 
122 # Enable "clippy" (a linter) as part of the Ru    122 # Enable "clippy" (a linter) as part of the Rust compilation.
123 #                                                 123 #
124 # Use 'make CLIPPY=1' to enable it.               124 # Use 'make CLIPPY=1' to enable it.
125 ifeq ("$(origin CLIPPY)", "command line")         125 ifeq ("$(origin CLIPPY)", "command line")
126   KBUILD_CLIPPY := $(CLIPPY)                      126   KBUILD_CLIPPY := $(CLIPPY)
127 endif                                             127 endif
128                                                   128 
129 export KBUILD_CLIPPY                              129 export KBUILD_CLIPPY
130                                                   130 
131 # Use make M=dir or set the environment variab    131 # Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the
132 # directory of external module to build. Setti    132 # directory of external module to build. Setting M= takes precedence.
133 ifeq ("$(origin M)", "command line")              133 ifeq ("$(origin M)", "command line")
134   KBUILD_EXTMOD := $(M)                           134   KBUILD_EXTMOD := $(M)
135 endif                                             135 endif
136                                                   136 
137 $(if $(word 2, $(KBUILD_EXTMOD)), \               137 $(if $(word 2, $(KBUILD_EXTMOD)), \
138         $(error building multiple external mod    138         $(error building multiple external modules is not supported))
139                                                   139 
140 $(foreach x, % :, $(if $(findstring $x, $(KBUI    140 $(foreach x, % :, $(if $(findstring $x, $(KBUILD_EXTMOD)), \
141         $(error module directory path cannot c    141         $(error module directory path cannot contain '$x')))
142                                                   142 
143 # Remove trailing slashes                         143 # Remove trailing slashes
144 ifneq ($(filter %/, $(KBUILD_EXTMOD)),)           144 ifneq ($(filter %/, $(KBUILD_EXTMOD)),)
145 KBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTM    145 KBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTMOD).)
146 endif                                             146 endif
147                                                   147 
148 export KBUILD_EXTMOD                              148 export KBUILD_EXTMOD
149                                                   149 
150 # backward compatibility                          150 # backward compatibility
151 KBUILD_EXTRA_WARN ?= $(KBUILD_ENABLE_EXTRA_GCC    151 KBUILD_EXTRA_WARN ?= $(KBUILD_ENABLE_EXTRA_GCC_CHECKS)
152                                                   152 
153 ifeq ("$(origin W)", "command line")              153 ifeq ("$(origin W)", "command line")
154   KBUILD_EXTRA_WARN := $(W)                       154   KBUILD_EXTRA_WARN := $(W)
155 endif                                             155 endif
156                                                   156 
157 export KBUILD_EXTRA_WARN                          157 export KBUILD_EXTRA_WARN
158                                                   158 
159 # Kbuild will save output files in the current    159 # Kbuild will save output files in the current working directory.
160 # This does not need to match to the root of t    160 # This does not need to match to the root of the kernel source tree.
161 #                                                 161 #
162 # For example, you can do this:                   162 # For example, you can do this:
163 #                                                 163 #
164 #  cd /dir/to/store/output/files; make -f /dir    164 #  cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile
165 #                                                 165 #
166 # If you want to save output files in a differ    166 # If you want to save output files in a different location, there are
167 # two syntaxes to specify it.                     167 # two syntaxes to specify it.
168 #                                                 168 #
169 # 1) O=                                           169 # 1) O=
170 # Use "make O=dir/to/store/output/files/"         170 # Use "make O=dir/to/store/output/files/"
171 #                                                 171 #
172 # 2) Set KBUILD_OUTPUT                            172 # 2) Set KBUILD_OUTPUT
173 # Set the environment variable KBUILD_OUTPUT t    173 # Set the environment variable KBUILD_OUTPUT to point to the output directory.
174 # export KBUILD_OUTPUT=dir/to/store/output/fil    174 # export KBUILD_OUTPUT=dir/to/store/output/files/; make
175 #                                                 175 #
176 # The O= assignment takes precedence over the     176 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
177 # variable.                                       177 # variable.
178                                                   178 
179 # Do we want to change the working directory?     179 # Do we want to change the working directory?
180 ifeq ("$(origin O)", "command line")              180 ifeq ("$(origin O)", "command line")
181   KBUILD_OUTPUT := $(O)                           181   KBUILD_OUTPUT := $(O)
182 endif                                             182 endif
183                                                   183 
184 ifneq ($(KBUILD_OUTPUT),)                         184 ifneq ($(KBUILD_OUTPUT),)
185 # $(realpath ...) gets empty if the path does     185 # $(realpath ...) gets empty if the path does not exist. Run 'mkdir -p' first.
186 $(shell mkdir -p "$(KBUILD_OUTPUT)")              186 $(shell mkdir -p "$(KBUILD_OUTPUT)")
187 # $(realpath ...) resolves symlinks               187 # $(realpath ...) resolves symlinks
188 abs_objtree := $(realpath $(KBUILD_OUTPUT))       188 abs_objtree := $(realpath $(KBUILD_OUTPUT))
189 $(if $(abs_objtree),,$(error failed to create     189 $(if $(abs_objtree),,$(error failed to create output directory "$(KBUILD_OUTPUT)"))
190 endif # ifneq ($(KBUILD_OUTPUT),)                 190 endif # ifneq ($(KBUILD_OUTPUT),)
191                                                   191 
192 ifneq ($(words $(subst :, ,$(abs_srctree))), 1    192 ifneq ($(words $(subst :, ,$(abs_srctree))), 1)
193 $(error source directory cannot contain spaces    193 $(error source directory cannot contain spaces or colons)
194 endif                                             194 endif
195                                                   195 
196 export sub_make_done := 1                         196 export sub_make_done := 1
197                                                   197 
198 endif # sub_make_done                             198 endif # sub_make_done
199                                                   199 
200 ifeq ($(abs_objtree),$(CURDIR))                   200 ifeq ($(abs_objtree),$(CURDIR))
201 # Suppress "Entering directory ..." if we are     201 # Suppress "Entering directory ..." if we are at the final work directory.
202 no-print-directory := --no-print-directory        202 no-print-directory := --no-print-directory
203 else                                              203 else
204 # Recursion to show "Entering directory ..."      204 # Recursion to show "Entering directory ..."
205 need-sub-make := 1                                205 need-sub-make := 1
206 endif                                             206 endif
207                                                   207 
208 ifeq ($(filter --no-print-directory, $(MAKEFLA    208 ifeq ($(filter --no-print-directory, $(MAKEFLAGS)),)
209 # If --no-print-directory is unset, recurse on    209 # If --no-print-directory is unset, recurse once again to set it.
210 # You may end up recursing into __sub-make twi    210 # You may end up recursing into __sub-make twice. This is needed due to the
211 # behavior change in GNU Make 4.4.1.              211 # behavior change in GNU Make 4.4.1.
212 need-sub-make := 1                                212 need-sub-make := 1
213 endif                                             213 endif
214                                                   214 
215 ifeq ($(need-sub-make),1)                         215 ifeq ($(need-sub-make),1)
216                                                   216 
217 PHONY += $(MAKECMDGOALS) __sub-make               217 PHONY += $(MAKECMDGOALS) __sub-make
218                                                   218 
219 $(filter-out $(this-makefile), $(MAKECMDGOALS)    219 $(filter-out $(this-makefile), $(MAKECMDGOALS)) __all: __sub-make
220         @:                                        220         @:
221                                                   221 
222 # Invoke a second make in the output directory    222 # Invoke a second make in the output directory, passing relevant variables
223 __sub-make:                                       223 __sub-make:
224         $(Q)$(MAKE) $(no-print-directory) -C $    224         $(Q)$(MAKE) $(no-print-directory) -C $(abs_objtree) \
225         -f $(abs_srctree)/Makefile $(MAKECMDGO    225         -f $(abs_srctree)/Makefile $(MAKECMDGOALS)
226                                                   226 
227 else # need-sub-make                              227 else # need-sub-make
228                                                   228 
229 # We process the rest of the Makefile if this     229 # We process the rest of the Makefile if this is the final invocation of make
230                                                   230 
231 ifeq ($(abs_srctree),$(abs_objtree))              231 ifeq ($(abs_srctree),$(abs_objtree))
232         # building in the source tree             232         # building in the source tree
233         srctree := .                              233         srctree := .
234         building_out_of_srctree :=                234         building_out_of_srctree :=
235 else                                              235 else
236         ifeq ($(abs_srctree)/,$(dir $(abs_objt    236         ifeq ($(abs_srctree)/,$(dir $(abs_objtree)))
237                 # building in a subdirectory o    237                 # building in a subdirectory of the source tree
238                 srctree := ..                     238                 srctree := ..
239         else                                      239         else
240                 srctree := $(abs_srctree)         240                 srctree := $(abs_srctree)
241         endif                                     241         endif
242         building_out_of_srctree := 1              242         building_out_of_srctree := 1
243 endif                                             243 endif
244                                                   244 
245 ifneq ($(KBUILD_ABS_SRCTREE),)                    245 ifneq ($(KBUILD_ABS_SRCTREE),)
246 srctree := $(abs_srctree)                         246 srctree := $(abs_srctree)
247 endif                                             247 endif
248                                                   248 
249 objtree         := .                              249 objtree         := .
250                                                   250 
251 VPATH           :=                                251 VPATH           :=
252                                                   252 
253 ifeq ($(KBUILD_EXTMOD),)                          253 ifeq ($(KBUILD_EXTMOD),)
254 ifdef building_out_of_srctree                     254 ifdef building_out_of_srctree
255 VPATH           := $(srctree)                     255 VPATH           := $(srctree)
256 endif                                             256 endif
257 endif                                             257 endif
258                                                   258 
259 export building_out_of_srctree srctree objtree    259 export building_out_of_srctree srctree objtree VPATH
260                                                   260 
261 # To make sure we do not include .config for a    261 # To make sure we do not include .config for any of the *config targets
262 # catch them early, and hand them over to scri    262 # catch them early, and hand them over to scripts/kconfig/Makefile
263 # It is allowed to specify more targets when c    263 # It is allowed to specify more targets when calling make, including
264 # mixing *config targets and build targets.       264 # mixing *config targets and build targets.
265 # For example 'make oldconfig all'.               265 # For example 'make oldconfig all'.
266 # Detect when mixed targets is specified, and     266 # Detect when mixed targets is specified, and make a second invocation
267 # of make so .config is not included in this c    267 # of make so .config is not included in this case either (for *config).
268                                                   268 
269 version_h := include/generated/uapi/linux/vers    269 version_h := include/generated/uapi/linux/version.h
270                                                   270 
271 clean-targets := %clean mrproper cleandocs        271 clean-targets := %clean mrproper cleandocs
272 no-dot-config-targets := $(clean-targets) \       272 no-dot-config-targets := $(clean-targets) \
273                          cscope gtags TAGS tag    273                          cscope gtags TAGS tags help% %docs check% coccicheck \
274                          $(version_h) headers     274                          $(version_h) headers headers_% archheaders archscripts \
275                          %asm-generic kernelve    275                          %asm-generic kernelversion %src-pkg dt_binding_check \
276                          outputmakefile rustav    276                          outputmakefile rustavailable rustfmt rustfmtcheck
277 no-sync-config-targets := $(no-dot-config-targ    277 no-sync-config-targets := $(no-dot-config-targets) %install modules_sign kernelrelease \
278                           image_name              278                           image_name
279 single-targets := %.a %.i %.ko %.lds %.ll %.ls    279 single-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.rsi %.s %.symtypes %/
280                                                   280 
281 config-build    :=                                281 config-build    :=
282 mixed-build     :=                                282 mixed-build     :=
283 need-config     := 1                              283 need-config     := 1
284 may-sync-config := 1                              284 may-sync-config := 1
285 single-build    :=                                285 single-build    :=
286                                                   286 
287 ifneq ($(filter $(no-dot-config-targets), $(MA    287 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
288     ifeq ($(filter-out $(no-dot-config-targets    288     ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
289         need-config :=                            289         need-config :=
290     endif                                         290     endif
291 endif                                             291 endif
292                                                   292 
293 ifneq ($(filter $(no-sync-config-targets), $(M    293 ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),)
294     ifeq ($(filter-out $(no-sync-config-target    294     ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),)
295         may-sync-config :=                        295         may-sync-config :=
296     endif                                         296     endif
297 endif                                             297 endif
298                                                   298 
299 need-compiler := $(may-sync-config)               299 need-compiler := $(may-sync-config)
300                                                   300 
301 ifneq ($(KBUILD_EXTMOD),)                         301 ifneq ($(KBUILD_EXTMOD),)
302     may-sync-config :=                            302     may-sync-config :=
303 endif                                             303 endif
304                                                   304 
305 ifeq ($(KBUILD_EXTMOD),)                          305 ifeq ($(KBUILD_EXTMOD),)
306     ifneq ($(filter %config,$(MAKECMDGOALS)),)    306     ifneq ($(filter %config,$(MAKECMDGOALS)),)
307         config-build := 1                         307         config-build := 1
308         ifneq ($(words $(MAKECMDGOALS)),1)        308         ifneq ($(words $(MAKECMDGOALS)),1)
309             mixed-build := 1                      309             mixed-build := 1
310         endif                                     310         endif
311     endif                                         311     endif
312 endif                                             312 endif
313                                                   313 
314 # We cannot build single targets and the other    314 # We cannot build single targets and the others at the same time
315 ifneq ($(filter $(single-targets), $(MAKECMDGO    315 ifneq ($(filter $(single-targets), $(MAKECMDGOALS)),)
316     single-build := 1                             316     single-build := 1
317     ifneq ($(filter-out $(single-targets), $(M    317     ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),)
318         mixed-build := 1                          318         mixed-build := 1
319     endif                                         319     endif
320 endif                                             320 endif
321                                                   321 
322 # For "make -j clean all", "make -j mrproper d    322 # For "make -j clean all", "make -j mrproper defconfig all", etc.
323 ifneq ($(filter $(clean-targets),$(MAKECMDGOAL    323 ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),)
324     ifneq ($(filter-out $(clean-targets),$(MAK    324     ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),)
325         mixed-build := 1                          325         mixed-build := 1
326     endif                                         326     endif
327 endif                                             327 endif
328                                                   328 
329 # install and modules_install need also be pro    329 # install and modules_install need also be processed one by one
330 ifneq ($(filter install,$(MAKECMDGOALS)),)        330 ifneq ($(filter install,$(MAKECMDGOALS)),)
331     ifneq ($(filter modules_install,$(MAKECMDG    331     ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
332         mixed-build := 1                          332         mixed-build := 1
333     endif                                         333     endif
334 endif                                             334 endif
335                                                   335 
336 ifdef mixed-build                                 336 ifdef mixed-build
337 # ============================================    337 # ===========================================================================
338 # We're called with mixed targets (*config and    338 # We're called with mixed targets (*config and build targets).
339 # Handle them one by one.                         339 # Handle them one by one.
340                                                   340 
341 PHONY += $(MAKECMDGOALS) __build_one_by_one       341 PHONY += $(MAKECMDGOALS) __build_one_by_one
342                                                   342 
343 $(MAKECMDGOALS): __build_one_by_one               343 $(MAKECMDGOALS): __build_one_by_one
344         @:                                        344         @:
345                                                   345 
346 __build_one_by_one:                               346 __build_one_by_one:
347         $(Q)set -e; \                             347         $(Q)set -e; \
348         for i in $(MAKECMDGOALS); do \            348         for i in $(MAKECMDGOALS); do \
349                 $(MAKE) -f $(srctree)/Makefile    349                 $(MAKE) -f $(srctree)/Makefile $$i; \
350         done                                      350         done
351                                                   351 
352 else # !mixed-build                               352 else # !mixed-build
353                                                   353 
354 include $(srctree)/scripts/Kbuild.include         354 include $(srctree)/scripts/Kbuild.include
355                                                   355 
356 # Read KERNELRELEASE from include/config/kerne    356 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
357 KERNELRELEASE = $(call read-file, include/conf    357 KERNELRELEASE = $(call read-file, include/config/kernel.release)
358 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.    358 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
359 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEA    359 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
360                                                   360 
361 include $(srctree)/scripts/subarch.include        361 include $(srctree)/scripts/subarch.include
362                                                   362 
363 # Cross compiling and selecting different set     363 # Cross compiling and selecting different set of gcc/bin-utils
364 # --------------------------------------------    364 # ---------------------------------------------------------------------------
365 #                                                 365 #
366 # When performing cross compilation for other     366 # When performing cross compilation for other architectures ARCH shall be set
367 # to the target architecture. (See arch/* for     367 # to the target architecture. (See arch/* for the possibilities).
368 # ARCH can be set during invocation of make:      368 # ARCH can be set during invocation of make:
369 # make ARCH=arm64                                 369 # make ARCH=arm64
370 # Another way is to have ARCH set in the envir    370 # Another way is to have ARCH set in the environment.
371 # The default ARCH is the host where make is e    371 # The default ARCH is the host where make is executed.
372                                                   372 
373 # CROSS_COMPILE specify the prefix used for al    373 # CROSS_COMPILE specify the prefix used for all executables used
374 # during compilation. Only gcc and related bin    374 # during compilation. Only gcc and related bin-utils executables
375 # are prefixed with $(CROSS_COMPILE).             375 # are prefixed with $(CROSS_COMPILE).
376 # CROSS_COMPILE can be set on the command line    376 # CROSS_COMPILE can be set on the command line
377 # make CROSS_COMPILE=aarch64-linux-gnu-           377 # make CROSS_COMPILE=aarch64-linux-gnu-
378 # Alternatively CROSS_COMPILE can be set in th    378 # Alternatively CROSS_COMPILE can be set in the environment.
379 # Default value for CROSS_COMPILE is not to pr    379 # Default value for CROSS_COMPILE is not to prefix executables
380 # Note: Some architectures assign CROSS_COMPIL    380 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
381 ARCH            ?= $(SUBARCH)                     381 ARCH            ?= $(SUBARCH)
382                                                   382 
383 # Architecture as present in compile.h            383 # Architecture as present in compile.h
384 UTS_MACHINE     := $(ARCH)                        384 UTS_MACHINE     := $(ARCH)
385 SRCARCH         := $(ARCH)                        385 SRCARCH         := $(ARCH)
386                                                   386 
387 # Additional ARCH settings for x86                387 # Additional ARCH settings for x86
388 ifeq ($(ARCH),i386)                               388 ifeq ($(ARCH),i386)
389         SRCARCH := x86                            389         SRCARCH := x86
390 endif                                             390 endif
391 ifeq ($(ARCH),x86_64)                             391 ifeq ($(ARCH),x86_64)
392         SRCARCH := x86                            392         SRCARCH := x86
393 endif                                             393 endif
394                                                   394 
395 # Additional ARCH settings for sparc              395 # Additional ARCH settings for sparc
396 ifeq ($(ARCH),sparc32)                            396 ifeq ($(ARCH),sparc32)
397        SRCARCH := sparc                           397        SRCARCH := sparc
398 endif                                             398 endif
399 ifeq ($(ARCH),sparc64)                            399 ifeq ($(ARCH),sparc64)
400        SRCARCH := sparc                           400        SRCARCH := sparc
401 endif                                             401 endif
402                                                   402 
403 # Additional ARCH settings for parisc             403 # Additional ARCH settings for parisc
404 ifeq ($(ARCH),parisc64)                           404 ifeq ($(ARCH),parisc64)
405        SRCARCH := parisc                          405        SRCARCH := parisc
406 endif                                             406 endif
407                                                   407 
408 export cross_compiling :=                         408 export cross_compiling :=
409 ifneq ($(SRCARCH),$(SUBARCH))                     409 ifneq ($(SRCARCH),$(SUBARCH))
410 cross_compiling := 1                              410 cross_compiling := 1
411 endif                                             411 endif
412                                                   412 
413 KCONFIG_CONFIG  ?= .config                        413 KCONFIG_CONFIG  ?= .config
414 export KCONFIG_CONFIG                             414 export KCONFIG_CONFIG
415                                                   415 
416 # SHELL used by kbuild                            416 # SHELL used by kbuild
417 CONFIG_SHELL := sh                                417 CONFIG_SHELL := sh
418                                                   418 
419 HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS     419 HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null)
420 HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAG    420 HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null)
421 HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/d    421 HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null)
422                                                   422 
423 ifneq ($(LLVM),)                                  423 ifneq ($(LLVM),)
424 ifneq ($(filter %/,$(LLVM)),)                     424 ifneq ($(filter %/,$(LLVM)),)
425 LLVM_PREFIX := $(LLVM)                            425 LLVM_PREFIX := $(LLVM)
426 else ifneq ($(filter -%,$(LLVM)),)                426 else ifneq ($(filter -%,$(LLVM)),)
427 LLVM_SUFFIX := $(LLVM)                            427 LLVM_SUFFIX := $(LLVM)
428 endif                                             428 endif
429                                                   429 
430 HOSTCC  = $(LLVM_PREFIX)clang$(LLVM_SUFFIX)       430 HOSTCC  = $(LLVM_PREFIX)clang$(LLVM_SUFFIX)
431 HOSTCXX = $(LLVM_PREFIX)clang++$(LLVM_SUFFIX)     431 HOSTCXX = $(LLVM_PREFIX)clang++$(LLVM_SUFFIX)
432 else                                              432 else
433 HOSTCC  = gcc                                     433 HOSTCC  = gcc
434 HOSTCXX = g++                                     434 HOSTCXX = g++
435 endif                                             435 endif
436 HOSTRUSTC = rustc                                 436 HOSTRUSTC = rustc
437 HOSTPKG_CONFIG  = pkg-config                      437 HOSTPKG_CONFIG  = pkg-config
438                                                   438 
439 KBUILD_USERHOSTCFLAGS := -Wall -Wmissing-proto    439 KBUILD_USERHOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \
440                          -O2 -fomit-frame-poin    440                          -O2 -fomit-frame-pointer -std=gnu11
441 KBUILD_USERCFLAGS  := $(KBUILD_USERHOSTCFLAGS)    441 KBUILD_USERCFLAGS  := $(KBUILD_USERHOSTCFLAGS) $(USERCFLAGS)
442 KBUILD_USERLDFLAGS := $(USERLDFLAGS)              442 KBUILD_USERLDFLAGS := $(USERLDFLAGS)
443                                                   443 
444 # These flags apply to all Rust code in the tr    444 # These flags apply to all Rust code in the tree, including the kernel and
445 # host programs.                                  445 # host programs.
446 export rust_common_flags := --edition=2021 \      446 export rust_common_flags := --edition=2021 \
447                             -Zbinary_dep_depin    447                             -Zbinary_dep_depinfo=y \
448                             -Astable_features     448                             -Astable_features \
449                             -Dunsafe_op_in_uns    449                             -Dunsafe_op_in_unsafe_fn \
450                             -Dnon_ascii_idents    450                             -Dnon_ascii_idents \
451                             -Wrust_2018_idioms    451                             -Wrust_2018_idioms \
452                             -Wunreachable_pub     452                             -Wunreachable_pub \
453                             -Wmissing_docs \      453                             -Wmissing_docs \
454                             -Wrustdoc::missing    454                             -Wrustdoc::missing_crate_level_docs \
455                             -Wclippy::all \       455                             -Wclippy::all \
456                             -Wclippy::mut_mut     456                             -Wclippy::mut_mut \
457                             -Wclippy::needless    457                             -Wclippy::needless_bitwise_bool \
458                             -Wclippy::needless    458                             -Wclippy::needless_continue \
459                             -Wclippy::no_mangl    459                             -Wclippy::no_mangle_with_rust_abi \
460                             -Wclippy::dbg_macr    460                             -Wclippy::dbg_macro
461                                                   461 
462 KBUILD_HOSTCFLAGS   := $(KBUILD_USERHOSTCFLAGS    462 KBUILD_HOSTCFLAGS   := $(KBUILD_USERHOSTCFLAGS) $(HOST_LFS_CFLAGS) \
463                        $(HOSTCFLAGS) -I $(srct    463                        $(HOSTCFLAGS) -I $(srctree)/scripts/include
464 KBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CF    464 KBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) \
465                        -I $(srctree)/scripts/i    465                        -I $(srctree)/scripts/include
466 KBUILD_HOSTRUSTFLAGS := $(rust_common_flags) -    466 KBUILD_HOSTRUSTFLAGS := $(rust_common_flags) -O -Cstrip=debuginfo \
467                         -Zallow-features= $(HO    467                         -Zallow-features= $(HOSTRUSTFLAGS)
468 KBUILD_HOSTLDFLAGS  := $(HOST_LFS_LDFLAGS) $(H    468 KBUILD_HOSTLDFLAGS  := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS)
469 KBUILD_HOSTLDLIBS   := $(HOST_LFS_LIBS) $(HOST    469 KBUILD_HOSTLDLIBS   := $(HOST_LFS_LIBS) $(HOSTLDLIBS)
470                                                   470 
471 # Make variables (CC, etc...)                     471 # Make variables (CC, etc...)
472 CPP             = $(CC) -E                        472 CPP             = $(CC) -E
473 ifneq ($(LLVM),)                                  473 ifneq ($(LLVM),)
474 CC              = $(LLVM_PREFIX)clang$(LLVM_SU    474 CC              = $(LLVM_PREFIX)clang$(LLVM_SUFFIX)
475 LD              = $(LLVM_PREFIX)ld.lld$(LLVM_S    475 LD              = $(LLVM_PREFIX)ld.lld$(LLVM_SUFFIX)
476 AR              = $(LLVM_PREFIX)llvm-ar$(LLVM_    476 AR              = $(LLVM_PREFIX)llvm-ar$(LLVM_SUFFIX)
477 NM              = $(LLVM_PREFIX)llvm-nm$(LLVM_    477 NM              = $(LLVM_PREFIX)llvm-nm$(LLVM_SUFFIX)
478 OBJCOPY         = $(LLVM_PREFIX)llvm-objcopy$(    478 OBJCOPY         = $(LLVM_PREFIX)llvm-objcopy$(LLVM_SUFFIX)
479 OBJDUMP         = $(LLVM_PREFIX)llvm-objdump$(    479 OBJDUMP         = $(LLVM_PREFIX)llvm-objdump$(LLVM_SUFFIX)
480 READELF         = $(LLVM_PREFIX)llvm-readelf$(    480 READELF         = $(LLVM_PREFIX)llvm-readelf$(LLVM_SUFFIX)
481 STRIP           = $(LLVM_PREFIX)llvm-strip$(LL    481 STRIP           = $(LLVM_PREFIX)llvm-strip$(LLVM_SUFFIX)
482 else                                              482 else
483 CC              = $(CROSS_COMPILE)gcc             483 CC              = $(CROSS_COMPILE)gcc
484 LD              = $(CROSS_COMPILE)ld              484 LD              = $(CROSS_COMPILE)ld
485 AR              = $(CROSS_COMPILE)ar              485 AR              = $(CROSS_COMPILE)ar
486 NM              = $(CROSS_COMPILE)nm              486 NM              = $(CROSS_COMPILE)nm
487 OBJCOPY         = $(CROSS_COMPILE)objcopy         487 OBJCOPY         = $(CROSS_COMPILE)objcopy
488 OBJDUMP         = $(CROSS_COMPILE)objdump         488 OBJDUMP         = $(CROSS_COMPILE)objdump
489 READELF         = $(CROSS_COMPILE)readelf         489 READELF         = $(CROSS_COMPILE)readelf
490 STRIP           = $(CROSS_COMPILE)strip           490 STRIP           = $(CROSS_COMPILE)strip
491 endif                                             491 endif
492 RUSTC           = rustc                           492 RUSTC           = rustc
493 RUSTDOC         = rustdoc                         493 RUSTDOC         = rustdoc
494 RUSTFMT         = rustfmt                         494 RUSTFMT         = rustfmt
495 CLIPPY_DRIVER   = clippy-driver                   495 CLIPPY_DRIVER   = clippy-driver
496 BINDGEN         = bindgen                         496 BINDGEN         = bindgen
497 PAHOLE          = pahole                          497 PAHOLE          = pahole
498 RESOLVE_BTFIDS  = $(objtree)/tools/bpf/resolve    498 RESOLVE_BTFIDS  = $(objtree)/tools/bpf/resolve_btfids/resolve_btfids
499 LEX             = flex                            499 LEX             = flex
500 YACC            = bison                           500 YACC            = bison
501 AWK             = awk                             501 AWK             = awk
502 INSTALLKERNEL  := installkernel                   502 INSTALLKERNEL  := installkernel
503 PERL            = perl                            503 PERL            = perl
504 PYTHON3         = python3                         504 PYTHON3         = python3
505 CHECK           = sparse                          505 CHECK           = sparse
506 BASH            = bash                            506 BASH            = bash
507 KGZIP           = gzip                            507 KGZIP           = gzip
508 KBZIP2          = bzip2                           508 KBZIP2          = bzip2
509 KLZOP           = lzop                            509 KLZOP           = lzop
510 LZMA            = lzma                            510 LZMA            = lzma
511 LZ4             = lz4c                            511 LZ4             = lz4c
512 XZ              = xz                              512 XZ              = xz
513 ZSTD            = zstd                            513 ZSTD            = zstd
514                                                   514 
515 CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC    515 CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
516                   -Wbitwise -Wno-return-void -    516                   -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
517 NOSTDINC_FLAGS :=                                 517 NOSTDINC_FLAGS :=
518 CFLAGS_MODULE   =                                 518 CFLAGS_MODULE   =
519 RUSTFLAGS_MODULE =                                519 RUSTFLAGS_MODULE =
520 AFLAGS_MODULE   =                                 520 AFLAGS_MODULE   =
521 LDFLAGS_MODULE  =                                 521 LDFLAGS_MODULE  =
522 CFLAGS_KERNEL   =                                 522 CFLAGS_KERNEL   =
523 RUSTFLAGS_KERNEL =                                523 RUSTFLAGS_KERNEL =
524 AFLAGS_KERNEL   =                                 524 AFLAGS_KERNEL   =
525 LDFLAGS_vmlinux =                                 525 LDFLAGS_vmlinux =
526                                                   526 
527 # Use USERINCLUDE when you must reference the     527 # Use USERINCLUDE when you must reference the UAPI directories only.
528 USERINCLUDE    := \                               528 USERINCLUDE    := \
529                 -I$(srctree)/arch/$(SRCARCH)/i    529                 -I$(srctree)/arch/$(SRCARCH)/include/uapi \
530                 -I$(objtree)/arch/$(SRCARCH)/i    530                 -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \
531                 -I$(srctree)/include/uapi \       531                 -I$(srctree)/include/uapi \
532                 -I$(objtree)/include/generated    532                 -I$(objtree)/include/generated/uapi \
533                 -include $(srctree)/include/li    533                 -include $(srctree)/include/linux/compiler-version.h \
534                 -include $(srctree)/include/li    534                 -include $(srctree)/include/linux/kconfig.h
535                                                   535 
536 # Use LINUXINCLUDE when you must reference the    536 # Use LINUXINCLUDE when you must reference the include/ directory.
537 # Needed to be compatible with the O= option      537 # Needed to be compatible with the O= option
538 LINUXINCLUDE    := \                              538 LINUXINCLUDE    := \
539                 -I$(srctree)/arch/$(SRCARCH)/i    539                 -I$(srctree)/arch/$(SRCARCH)/include \
540                 -I$(objtree)/arch/$(SRCARCH)/i    540                 -I$(objtree)/arch/$(SRCARCH)/include/generated \
541                 $(if $(building_out_of_srctree    541                 $(if $(building_out_of_srctree),-I$(srctree)/include) \
542                 -I$(objtree)/include \            542                 -I$(objtree)/include \
543                 $(USERINCLUDE)                    543                 $(USERINCLUDE)
544                                                   544 
545 KBUILD_AFLAGS   := -D__ASSEMBLY__ -fno-PIE        545 KBUILD_AFLAGS   := -D__ASSEMBLY__ -fno-PIE
546                                                   546 
547 KBUILD_CFLAGS :=                                  547 KBUILD_CFLAGS :=
548 KBUILD_CFLAGS += -std=gnu11                       548 KBUILD_CFLAGS += -std=gnu11
549 KBUILD_CFLAGS += -fshort-wchar                    549 KBUILD_CFLAGS += -fshort-wchar
550 KBUILD_CFLAGS += -funsigned-char                  550 KBUILD_CFLAGS += -funsigned-char
551 KBUILD_CFLAGS += -fno-common                      551 KBUILD_CFLAGS += -fno-common
552 KBUILD_CFLAGS += -fno-PIE                         552 KBUILD_CFLAGS += -fno-PIE
553 KBUILD_CFLAGS += -fno-strict-aliasing             553 KBUILD_CFLAGS += -fno-strict-aliasing
554                                                   554 
555 KBUILD_CPPFLAGS := -D__KERNEL__                   555 KBUILD_CPPFLAGS := -D__KERNEL__
556 KBUILD_RUSTFLAGS := $(rust_common_flags) \        556 KBUILD_RUSTFLAGS := $(rust_common_flags) \
557                     -Cpanic=abort -Cembed-bitc    557                     -Cpanic=abort -Cembed-bitcode=n -Clto=n \
558                     -Cforce-unwind-tables=n -C    558                     -Cforce-unwind-tables=n -Ccodegen-units=1 \
559                     -Csymbol-mangling-version=    559                     -Csymbol-mangling-version=v0 \
560                     -Crelocation-model=static     560                     -Crelocation-model=static \
561                     -Zfunction-sections=n \       561                     -Zfunction-sections=n \
562                     -Wclippy::float_arithmetic    562                     -Wclippy::float_arithmetic
563                                                   563 
564 KBUILD_AFLAGS_KERNEL :=                           564 KBUILD_AFLAGS_KERNEL :=
565 KBUILD_CFLAGS_KERNEL :=                           565 KBUILD_CFLAGS_KERNEL :=
566 KBUILD_RUSTFLAGS_KERNEL :=                        566 KBUILD_RUSTFLAGS_KERNEL :=
567 KBUILD_AFLAGS_MODULE  := -DMODULE                 567 KBUILD_AFLAGS_MODULE  := -DMODULE
568 KBUILD_CFLAGS_MODULE  := -DMODULE                 568 KBUILD_CFLAGS_MODULE  := -DMODULE
569 KBUILD_RUSTFLAGS_MODULE := --cfg MODULE           569 KBUILD_RUSTFLAGS_MODULE := --cfg MODULE
570 KBUILD_LDFLAGS_MODULE :=                          570 KBUILD_LDFLAGS_MODULE :=
571 KBUILD_LDFLAGS :=                                 571 KBUILD_LDFLAGS :=
572 CLANG_FLAGS :=                                    572 CLANG_FLAGS :=
573                                                   573 
574 ifeq ($(KBUILD_CLIPPY),1)                         574 ifeq ($(KBUILD_CLIPPY),1)
575         RUSTC_OR_CLIPPY_QUIET := CLIPPY           575         RUSTC_OR_CLIPPY_QUIET := CLIPPY
576         RUSTC_OR_CLIPPY = $(CLIPPY_DRIVER)        576         RUSTC_OR_CLIPPY = $(CLIPPY_DRIVER)
577 else                                              577 else
578         RUSTC_OR_CLIPPY_QUIET := RUSTC            578         RUSTC_OR_CLIPPY_QUIET := RUSTC
579         RUSTC_OR_CLIPPY = $(RUSTC)                579         RUSTC_OR_CLIPPY = $(RUSTC)
580 endif                                             580 endif
581                                                   581 
582 ifdef RUST_LIB_SRC                                582 ifdef RUST_LIB_SRC
583         export RUST_LIB_SRC                       583         export RUST_LIB_SRC
584 endif                                             584 endif
585                                                   585 
586 # Allows the usage of unstable features in sta    586 # Allows the usage of unstable features in stable compilers.
587 export RUSTC_BOOTSTRAP := 1                       587 export RUSTC_BOOTSTRAP := 1
588                                                   588 
589 export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC K    589 export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC HOSTPKG_CONFIG
590 export RUSTC RUSTDOC RUSTFMT RUSTC_OR_CLIPPY_Q    590 export RUSTC RUSTDOC RUSTFMT RUSTC_OR_CLIPPY_QUIET RUSTC_OR_CLIPPY BINDGEN
591 export HOSTRUSTC KBUILD_HOSTRUSTFLAGS             591 export HOSTRUSTC KBUILD_HOSTRUSTFLAGS
592 export CPP AR NM STRIP OBJCOPY OBJDUMP READELF    592 export CPP AR NM STRIP OBJCOPY OBJDUMP READELF PAHOLE RESOLVE_BTFIDS LEX YACC AWK INSTALLKERNEL
593 export PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_    593 export PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX
594 export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD        594 export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD
595 export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS     595 export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE
596 export KBUILD_USERCFLAGS KBUILD_USERLDFLAGS       596 export KBUILD_USERCFLAGS KBUILD_USERLDFLAGS
597                                                   597 
598 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINC    598 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS
599 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODU    599 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
600 export KBUILD_RUSTFLAGS RUSTFLAGS_KERNEL RUSTF    600 export KBUILD_RUSTFLAGS RUSTFLAGS_KERNEL RUSTFLAGS_MODULE
601 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODU    601 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
602 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODU    602 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_RUSTFLAGS_MODULE KBUILD_LDFLAGS_MODULE
603 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERN    603 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL KBUILD_RUSTFLAGS_KERNEL
604                                                   604 
605 # Files to ignore in find ... statements          605 # Files to ignore in find ... statements
606                                                   606 
607 export RCS_FIND_IGNORE := \( -name SCCS -o -na    607 export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o    \
608                           -name CVS -o -name .    608                           -name CVS -o -name .pc -o -name .hg -o -name .git \) \
609                           -prune -o               609                           -prune -o
610                                                   610 
611 # ============================================    611 # ===========================================================================
612 # Rules shared between *config targets and bui    612 # Rules shared between *config targets and build targets
613                                                   613 
614 # Basic helpers built in scripts/basic/           614 # Basic helpers built in scripts/basic/
615 PHONY += scripts_basic                            615 PHONY += scripts_basic
616 scripts_basic:                                    616 scripts_basic:
617         $(Q)$(MAKE) $(build)=scripts/basic        617         $(Q)$(MAKE) $(build)=scripts/basic
618                                                   618 
619 PHONY += outputmakefile                           619 PHONY += outputmakefile
620 ifdef building_out_of_srctree                     620 ifdef building_out_of_srctree
621 # Before starting out-of-tree build, make sure    621 # Before starting out-of-tree build, make sure the source tree is clean.
622 # outputmakefile generates a Makefile in the o    622 # outputmakefile generates a Makefile in the output directory, if using a
623 # separate output directory. This allows conve    623 # separate output directory. This allows convenient use of make in the
624 # output directory.                               624 # output directory.
625 # At the same time when output Makefile genera    625 # At the same time when output Makefile generated, generate .gitignore to
626 # ignore whole output directory                   626 # ignore whole output directory
627                                                   627 
628 quiet_cmd_makefile = GEN     Makefile             628 quiet_cmd_makefile = GEN     Makefile
629       cmd_makefile = { \                          629       cmd_makefile = { \
630         echo "\# Automatically generated by $(    630         echo "\# Automatically generated by $(srctree)/Makefile: don't edit"; \
631         echo "include $(srctree)/Makefile"; \     631         echo "include $(srctree)/Makefile"; \
632         } > Makefile                              632         } > Makefile
633                                                   633 
634 outputmakefile:                                   634 outputmakefile:
635         @if [ -f $(srctree)/.config -o \          635         @if [ -f $(srctree)/.config -o \
636                  -d $(srctree)/include/config     636                  -d $(srctree)/include/config -o \
637                  -d $(srctree)/arch/$(SRCARCH)    637                  -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \
638                 echo >&2 "***"; \                 638                 echo >&2 "***"; \
639                 echo >&2 "*** The source tree     639                 echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \
640                 echo >&2 "*** in $(abs_srctree    640                 echo >&2 "*** in $(abs_srctree)";\
641                 echo >&2 "***"; \                 641                 echo >&2 "***"; \
642                 false; \                          642                 false; \
643         fi                                        643         fi
644         $(Q)ln -fsn $(srctree) source             644         $(Q)ln -fsn $(srctree) source
645         $(call cmd,makefile)                      645         $(call cmd,makefile)
646         $(Q)test -e .gitignore || \               646         $(Q)test -e .gitignore || \
647         { echo "# this is build directory, ign    647         { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore
648 endif                                             648 endif
649                                                   649 
650 # The expansion should be delayed until arch/$    650 # The expansion should be delayed until arch/$(SRCARCH)/Makefile is included.
651 # Some architectures define CROSS_COMPILE in a    651 # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile.
652 # CC_VERSION_TEXT is referenced from Kconfig (    652 # CC_VERSION_TEXT is referenced from Kconfig (so it needs export),
653 # and from include/config/auto.conf.cmd to det    653 # and from include/config/auto.conf.cmd to detect the compiler upgrade.
654 CC_VERSION_TEXT = $(subst $(pound),,$(shell LC    654 CC_VERSION_TEXT = $(subst $(pound),,$(shell LC_ALL=C $(CC) --version 2>/dev/null | head -n 1))
655                                                   655 
656 ifneq ($(findstring clang,$(CC_VERSION_TEXT)),    656 ifneq ($(findstring clang,$(CC_VERSION_TEXT)),)
657 include $(srctree)/scripts/Makefile.clang         657 include $(srctree)/scripts/Makefile.clang
658 endif                                             658 endif
659                                                   659 
660 # Include this also for config targets because    660 # Include this also for config targets because some architectures need
661 # cc-cross-prefix to determine CROSS_COMPILE.     661 # cc-cross-prefix to determine CROSS_COMPILE.
662 ifdef need-compiler                               662 ifdef need-compiler
663 include $(srctree)/scripts/Makefile.compiler      663 include $(srctree)/scripts/Makefile.compiler
664 endif                                             664 endif
665                                                   665 
666 ifdef config-build                                666 ifdef config-build
667 # ============================================    667 # ===========================================================================
668 # *config targets only - make sure prerequisit    668 # *config targets only - make sure prerequisites are updated, and descend
669 # in scripts/kconfig to make the *config targe    669 # in scripts/kconfig to make the *config target
670                                                   670 
671 # Read arch-specific Makefile to set KBUILD_DE    671 # Read arch-specific Makefile to set KBUILD_DEFCONFIG as needed.
672 # KBUILD_DEFCONFIG may point out an alternativ    672 # KBUILD_DEFCONFIG may point out an alternative default configuration
673 # used for 'make defconfig'                       673 # used for 'make defconfig'
674 include $(srctree)/arch/$(SRCARCH)/Makefile       674 include $(srctree)/arch/$(SRCARCH)/Makefile
675 export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERS    675 export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT
676                                                   676 
677 config: outputmakefile scripts_basic FORCE        677 config: outputmakefile scripts_basic FORCE
678         $(Q)$(MAKE) $(build)=scripts/kconfig $    678         $(Q)$(MAKE) $(build)=scripts/kconfig $@
679                                                   679 
680 %config: outputmakefile scripts_basic FORCE       680 %config: outputmakefile scripts_basic FORCE
681         $(Q)$(MAKE) $(build)=scripts/kconfig $    681         $(Q)$(MAKE) $(build)=scripts/kconfig $@
682                                                   682 
683 else #!config-build                               683 else #!config-build
684 # ============================================    684 # ===========================================================================
685 # Build targets only - this includes vmlinux,     685 # Build targets only - this includes vmlinux, arch-specific targets, clean
686 # targets and others. In general all targets e    686 # targets and others. In general all targets except *config targets.
687                                                   687 
688 # If building an external module we do not car    688 # If building an external module we do not care about the all: rule
689 # but instead __all depend on modules             689 # but instead __all depend on modules
690 PHONY += all                                      690 PHONY += all
691 ifeq ($(KBUILD_EXTMOD),)                          691 ifeq ($(KBUILD_EXTMOD),)
692 __all: all                                        692 __all: all
693 else                                              693 else
694 __all: modules                                    694 __all: modules
695 endif                                             695 endif
696                                                   696 
697 targets :=                                        697 targets :=
698                                                   698 
699 # Decide whether to build built-in, modular, o    699 # Decide whether to build built-in, modular, or both.
700 # Normally, just do built-in.                     700 # Normally, just do built-in.
701                                                   701 
702 KBUILD_MODULES :=                                 702 KBUILD_MODULES :=
703 KBUILD_BUILTIN := 1                               703 KBUILD_BUILTIN := 1
704                                                   704 
705 # If we have only "make modules", don't compil    705 # If we have only "make modules", don't compile built-in objects.
706 ifeq ($(MAKECMDGOALS),modules)                    706 ifeq ($(MAKECMDGOALS),modules)
707   KBUILD_BUILTIN :=                               707   KBUILD_BUILTIN :=
708 endif                                             708 endif
709                                                   709 
710 # If we have "make <whatever> modules", compil    710 # If we have "make <whatever> modules", compile modules
711 # in addition to whatever we do anyway.           711 # in addition to whatever we do anyway.
712 # Just "make" or "make all" shall build module    712 # Just "make" or "make all" shall build modules as well
713                                                   713 
714 ifneq ($(filter all modules nsdeps %compile_co    714 ifneq ($(filter all modules nsdeps %compile_commands.json clang-%,$(MAKECMDGOALS)),)
715   KBUILD_MODULES := 1                             715   KBUILD_MODULES := 1
716 endif                                             716 endif
717                                                   717 
718 ifeq ($(MAKECMDGOALS),)                           718 ifeq ($(MAKECMDGOALS),)
719   KBUILD_MODULES := 1                             719   KBUILD_MODULES := 1
720 endif                                             720 endif
721                                                   721 
722 export KBUILD_MODULES KBUILD_BUILTIN              722 export KBUILD_MODULES KBUILD_BUILTIN
723                                                   723 
724 ifdef need-config                                 724 ifdef need-config
725 include include/config/auto.conf                  725 include include/config/auto.conf
726 endif                                             726 endif
727                                                   727 
728 ifeq ($(KBUILD_EXTMOD),)                          728 ifeq ($(KBUILD_EXTMOD),)
729 # Objects we will link into vmlinux / subdirs     729 # Objects we will link into vmlinux / subdirs we need to visit
730 core-y          :=                                730 core-y          :=
731 drivers-y       :=                                731 drivers-y       :=
732 libs-y          := lib/                           732 libs-y          := lib/
733 endif # KBUILD_EXTMOD                             733 endif # KBUILD_EXTMOD
734                                                   734 
735 # The all: target is the default when no targe    735 # The all: target is the default when no target is given on the
736 # command line.                                   736 # command line.
737 # This allow a user to issue only 'make' to bu    737 # This allow a user to issue only 'make' to build a kernel including modules
738 # Defaults to vmlinux, but the arch makefile u    738 # Defaults to vmlinux, but the arch makefile usually adds further targets
739 all: vmlinux                                      739 all: vmlinux
740                                                   740 
741 CFLAGS_GCOV     := -fprofile-arcs -ftest-cover    741 CFLAGS_GCOV     := -fprofile-arcs -ftest-coverage
742 ifdef CONFIG_CC_IS_GCC                            742 ifdef CONFIG_CC_IS_GCC
743 CFLAGS_GCOV     += -fno-tree-loop-im              743 CFLAGS_GCOV     += -fno-tree-loop-im
744 endif                                             744 endif
745 export CFLAGS_GCOV                                745 export CFLAGS_GCOV
746                                                   746 
747 # The arch Makefiles can override CC_FLAGS_FTR    747 # The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later.
748 ifdef CONFIG_FUNCTION_TRACER                      748 ifdef CONFIG_FUNCTION_TRACER
749   CC_FLAGS_FTRACE := -pg                          749   CC_FLAGS_FTRACE := -pg
750 endif                                             750 endif
751                                                   751 
752 include $(srctree)/arch/$(SRCARCH)/Makefile       752 include $(srctree)/arch/$(SRCARCH)/Makefile
753                                                   753 
754 ifdef need-config                                 754 ifdef need-config
755 ifdef may-sync-config                             755 ifdef may-sync-config
756 # Read in dependencies to all Kconfig* files,     756 # Read in dependencies to all Kconfig* files, make sure to run syncconfig if
757 # changes are detected. This should be include    757 # changes are detected. This should be included after arch/$(SRCARCH)/Makefile
758 # because some architectures define CROSS_COMP    758 # because some architectures define CROSS_COMPILE there.
759 include include/config/auto.conf.cmd              759 include include/config/auto.conf.cmd
760                                                   760 
761 $(KCONFIG_CONFIG):                                761 $(KCONFIG_CONFIG):
762         @echo >&2 '***'                           762         @echo >&2 '***'
763         @echo >&2 '*** Configuration file "$@"    763         @echo >&2 '*** Configuration file "$@" not found!'
764         @echo >&2 '***'                           764         @echo >&2 '***'
765         @echo >&2 '*** Please run some configu    765         @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or'
766         @echo >&2 '*** "make menuconfig" or "m    766         @echo >&2 '*** "make menuconfig" or "make xconfig").'
767         @echo >&2 '***'                           767         @echo >&2 '***'
768         @/bin/false                               768         @/bin/false
769                                                   769 
770 # The actual configuration files used during t    770 # The actual configuration files used during the build are stored in
771 # include/generated/ and include/config/. Upda    771 # include/generated/ and include/config/. Update them if .config is newer than
772 # include/config/auto.conf (which mirrors .con    772 # include/config/auto.conf (which mirrors .config).
773 #                                                 773 #
774 # This exploits the 'multi-target pattern rule    774 # This exploits the 'multi-target pattern rule' trick.
775 # The syncconfig should be executed only once     775 # The syncconfig should be executed only once to make all the targets.
776 # (Note: use the grouped target '&:' when we b    776 # (Note: use the grouped target '&:' when we bump to GNU Make 4.3)
777 #                                                 777 #
778 # Do not use $(call cmd,...) here. That would     778 # Do not use $(call cmd,...) here. That would suppress prompts from syncconfig,
779 # so you cannot notice that Kconfig is waiting    779 # so you cannot notice that Kconfig is waiting for the user input.
780 %/config/auto.conf %/config/auto.conf.cmd %/ge    780 %/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h %/generated/rustc_cfg: $(KCONFIG_CONFIG)
781         $(Q)$(kecho) "  SYNC    $@"               781         $(Q)$(kecho) "  SYNC    $@"
782         $(Q)$(MAKE) -f $(srctree)/Makefile syn    782         $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig
783 else # !may-sync-config                           783 else # !may-sync-config
784 # External modules and some install targets ne    784 # External modules and some install targets need include/generated/autoconf.h
785 # and include/config/auto.conf but do not care    785 # and include/config/auto.conf but do not care if they are up-to-date.
786 # Use auto.conf to trigger the test               786 # Use auto.conf to trigger the test
787 PHONY += include/config/auto.conf                 787 PHONY += include/config/auto.conf
788                                                   788 
789 include/config/auto.conf:                         789 include/config/auto.conf:
790         @test -e include/generated/autoconf.h     790         @test -e include/generated/autoconf.h -a -e $@ || (             \
791         echo >&2;                                 791         echo >&2;                                                       \
792         echo >&2 "  ERROR: Kernel configuratio    792         echo >&2 "  ERROR: Kernel configuration is invalid.";           \
793         echo >&2 "         include/generated/a    793         echo >&2 "         include/generated/autoconf.h or $@ are missing.";\
794         echo >&2 "         Run 'make oldconfig    794         echo >&2 "         Run 'make oldconfig && make prepare' on kernel src to fix it.";      \
795         echo >&2 ;                                795         echo >&2 ;                                                      \
796         /bin/false)                               796         /bin/false)
797                                                   797 
798 endif # may-sync-config                           798 endif # may-sync-config
799 endif # need-config                               799 endif # need-config
800                                                   800 
801 KBUILD_CFLAGS   += -fno-delete-null-pointer-ch    801 KBUILD_CFLAGS   += -fno-delete-null-pointer-checks
802                                                   802 
803 ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE          803 ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
804 KBUILD_CFLAGS += -O2                              804 KBUILD_CFLAGS += -O2
805 KBUILD_RUSTFLAGS += -Copt-level=2                 805 KBUILD_RUSTFLAGS += -Copt-level=2
806 else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE            806 else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
807 KBUILD_CFLAGS += -Os                              807 KBUILD_CFLAGS += -Os
808 KBUILD_RUSTFLAGS += -Copt-level=s                 808 KBUILD_RUSTFLAGS += -Copt-level=s
809 endif                                             809 endif
810                                                   810 
811 # Always set `debug-assertions` and `overflow-    811 # Always set `debug-assertions` and `overflow-checks` because their default
812 # depends on `opt-level` and `debug-assertions    812 # depends on `opt-level` and `debug-assertions`, respectively.
813 KBUILD_RUSTFLAGS += -Cdebug-assertions=$(if $(    813 KBUILD_RUSTFLAGS += -Cdebug-assertions=$(if $(CONFIG_RUST_DEBUG_ASSERTIONS),y,n)
814 KBUILD_RUSTFLAGS += -Coverflow-checks=$(if $(C    814 KBUILD_RUSTFLAGS += -Coverflow-checks=$(if $(CONFIG_RUST_OVERFLOW_CHECKS),y,n)
815                                                   815 
816 # Tell gcc to never replace conditional load w    816 # Tell gcc to never replace conditional load with a non-conditional one
817 ifdef CONFIG_CC_IS_GCC                            817 ifdef CONFIG_CC_IS_GCC
818 # gcc-10 renamed --param=allow-store-data-race    818 # gcc-10 renamed --param=allow-store-data-races=0 to
819 # -fno-allow-store-data-races.                    819 # -fno-allow-store-data-races.
820 KBUILD_CFLAGS   += $(call cc-option,--param=al    820 KBUILD_CFLAGS   += $(call cc-option,--param=allow-store-data-races=0)
821 KBUILD_CFLAGS   += $(call cc-option,-fno-allow    821 KBUILD_CFLAGS   += $(call cc-option,-fno-allow-store-data-races)
822 endif                                             822 endif
823                                                   823 
824 ifdef CONFIG_READABLE_ASM                         824 ifdef CONFIG_READABLE_ASM
825 # Disable optimizations that make assembler li    825 # Disable optimizations that make assembler listings hard to read.
826 # reorder blocks reorders the control in the f    826 # reorder blocks reorders the control in the function
827 # ipa clone creates specialized cloned functio    827 # ipa clone creates specialized cloned functions
828 # partial inlining inlines only parts of funct    828 # partial inlining inlines only parts of functions
829 KBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa-    829 KBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa-cp-clone -fno-partial-inlining
830 endif                                             830 endif
831                                                   831 
832 stackp-flags-y                                    832 stackp-flags-y                                    := -fno-stack-protector
833 stackp-flags-$(CONFIG_STACKPROTECTOR)             833 stackp-flags-$(CONFIG_STACKPROTECTOR)             := -fstack-protector
834 stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG)      834 stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG)      := -fstack-protector-strong
835                                                   835 
836 KBUILD_CFLAGS += $(stackp-flags-y)                836 KBUILD_CFLAGS += $(stackp-flags-y)
837                                                   837 
838 KBUILD_RUSTFLAGS-$(CONFIG_WERROR) += -Dwarning    838 KBUILD_RUSTFLAGS-$(CONFIG_WERROR) += -Dwarnings
839 KBUILD_RUSTFLAGS += $(KBUILD_RUSTFLAGS-y)         839 KBUILD_RUSTFLAGS += $(KBUILD_RUSTFLAGS-y)
840                                                   840 
841 ifdef CONFIG_FRAME_POINTER                        841 ifdef CONFIG_FRAME_POINTER
842 KBUILD_CFLAGS   += -fno-omit-frame-pointer -fn    842 KBUILD_CFLAGS   += -fno-omit-frame-pointer -fno-optimize-sibling-calls
843 KBUILD_RUSTFLAGS += -Cforce-frame-pointers=y      843 KBUILD_RUSTFLAGS += -Cforce-frame-pointers=y
844 else                                              844 else
845 # Some targets (ARM with Thumb2, for example),    845 # Some targets (ARM with Thumb2, for example), can't be built with frame
846 # pointers.  For those, we don't have FUNCTION    846 # pointers.  For those, we don't have FUNCTION_TRACER automatically
847 # select FRAME_POINTER.  However, FUNCTION_TRA    847 # select FRAME_POINTER.  However, FUNCTION_TRACER adds -pg, and this is
848 # incompatible with -fomit-frame-pointer with     848 # incompatible with -fomit-frame-pointer with current GCC, so we don't use
849 # -fomit-frame-pointer with FUNCTION_TRACER.      849 # -fomit-frame-pointer with FUNCTION_TRACER.
850 # In the Rust target specification, "frame-poi    850 # In the Rust target specification, "frame-pointer" is set explicitly
851 # to "may-omit".                                  851 # to "may-omit".
852 ifndef CONFIG_FUNCTION_TRACER                     852 ifndef CONFIG_FUNCTION_TRACER
853 KBUILD_CFLAGS   += -fomit-frame-pointer           853 KBUILD_CFLAGS   += -fomit-frame-pointer
854 endif                                             854 endif
855 endif                                             855 endif
856                                                   856 
857 # Initialize all stack variables with a 0xAA p    857 # Initialize all stack variables with a 0xAA pattern.
858 ifdef CONFIG_INIT_STACK_ALL_PATTERN               858 ifdef CONFIG_INIT_STACK_ALL_PATTERN
859 KBUILD_CFLAGS   += -ftrivial-auto-var-init=pat    859 KBUILD_CFLAGS   += -ftrivial-auto-var-init=pattern
860 endif                                             860 endif
861                                                   861 
862 # Initialize all stack variables with a zero v    862 # Initialize all stack variables with a zero value.
863 ifdef CONFIG_INIT_STACK_ALL_ZERO                  863 ifdef CONFIG_INIT_STACK_ALL_ZERO
864 KBUILD_CFLAGS   += -ftrivial-auto-var-init=zer    864 KBUILD_CFLAGS   += -ftrivial-auto-var-init=zero
865 ifdef CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_ENABLER    865 ifdef CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_ENABLER
866 # https://github.com/llvm/llvm-project/issues/    866 # https://github.com/llvm/llvm-project/issues/44842
867 CC_AUTO_VAR_INIT_ZERO_ENABLER := -enable-trivi    867 CC_AUTO_VAR_INIT_ZERO_ENABLER := -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang
868 export CC_AUTO_VAR_INIT_ZERO_ENABLER              868 export CC_AUTO_VAR_INIT_ZERO_ENABLER
869 KBUILD_CFLAGS   += $(CC_AUTO_VAR_INIT_ZERO_ENA    869 KBUILD_CFLAGS   += $(CC_AUTO_VAR_INIT_ZERO_ENABLER)
870 endif                                             870 endif
871 endif                                             871 endif
872                                                   872 
873 # While VLAs have been removed, GCC produces u    873 # While VLAs have been removed, GCC produces unreachable stack probes
874 # for the randomize_kstack_offset feature. Dis    874 # for the randomize_kstack_offset feature. Disable it for all compilers.
875 KBUILD_CFLAGS   += $(call cc-option, -fno-stac    875 KBUILD_CFLAGS   += $(call cc-option, -fno-stack-clash-protection)
876                                                   876 
877 # Clear used registers at func exit (to reduce    877 # Clear used registers at func exit (to reduce data lifetime and ROP gadgets).
878 ifdef CONFIG_ZERO_CALL_USED_REGS                  878 ifdef CONFIG_ZERO_CALL_USED_REGS
879 KBUILD_CFLAGS   += -fzero-call-used-regs=used-    879 KBUILD_CFLAGS   += -fzero-call-used-regs=used-gpr
880 endif                                             880 endif
881                                                   881 
882 ifdef CONFIG_FUNCTION_TRACER                      882 ifdef CONFIG_FUNCTION_TRACER
883 ifdef CONFIG_FTRACE_MCOUNT_USE_CC                 883 ifdef CONFIG_FTRACE_MCOUNT_USE_CC
884   CC_FLAGS_FTRACE       += -mrecord-mcount        884   CC_FLAGS_FTRACE       += -mrecord-mcount
885   ifdef CONFIG_HAVE_NOP_MCOUNT                    885   ifdef CONFIG_HAVE_NOP_MCOUNT
886     ifeq ($(call cc-option-yn, -mnop-mcount),y    886     ifeq ($(call cc-option-yn, -mnop-mcount),y)
887       CC_FLAGS_FTRACE   += -mnop-mcount           887       CC_FLAGS_FTRACE   += -mnop-mcount
888       CC_FLAGS_USING    += -DCC_USING_NOP_MCOU    888       CC_FLAGS_USING    += -DCC_USING_NOP_MCOUNT
889     endif                                         889     endif
890   endif                                           890   endif
891 endif                                             891 endif
892 ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL            892 ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL
893   ifdef CONFIG_HAVE_OBJTOOL_NOP_MCOUNT            893   ifdef CONFIG_HAVE_OBJTOOL_NOP_MCOUNT
894     CC_FLAGS_USING      += -DCC_USING_NOP_MCOU    894     CC_FLAGS_USING      += -DCC_USING_NOP_MCOUNT
895   endif                                           895   endif
896 endif                                             896 endif
897 ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT       897 ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT
898   ifdef CONFIG_HAVE_C_RECORDMCOUNT                898   ifdef CONFIG_HAVE_C_RECORDMCOUNT
899     BUILD_C_RECORDMCOUNT := y                     899     BUILD_C_RECORDMCOUNT := y
900     export BUILD_C_RECORDMCOUNT                   900     export BUILD_C_RECORDMCOUNT
901   endif                                           901   endif
902 endif                                             902 endif
903 ifdef CONFIG_HAVE_FENTRY                          903 ifdef CONFIG_HAVE_FENTRY
904   # s390-linux-gnu-gcc did not support -mfentr    904   # s390-linux-gnu-gcc did not support -mfentry until gcc-9.
905   ifeq ($(call cc-option-yn, -mfentry),y)         905   ifeq ($(call cc-option-yn, -mfentry),y)
906     CC_FLAGS_FTRACE     += -mfentry               906     CC_FLAGS_FTRACE     += -mfentry
907     CC_FLAGS_USING      += -DCC_USING_FENTRY      907     CC_FLAGS_USING      += -DCC_USING_FENTRY
908   endif                                           908   endif
909 endif                                             909 endif
910 export CC_FLAGS_FTRACE                            910 export CC_FLAGS_FTRACE
911 KBUILD_CFLAGS   += $(CC_FLAGS_FTRACE) $(CC_FLA    911 KBUILD_CFLAGS   += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING)
912 KBUILD_AFLAGS   += $(CC_FLAGS_USING)              912 KBUILD_AFLAGS   += $(CC_FLAGS_USING)
913 endif                                             913 endif
914                                                   914 
915 # We trigger additional mismatches with less i    915 # We trigger additional mismatches with less inlining
916 ifdef CONFIG_DEBUG_SECTION_MISMATCH               916 ifdef CONFIG_DEBUG_SECTION_MISMATCH
917 KBUILD_CFLAGS += -fno-inline-functions-called-    917 KBUILD_CFLAGS += -fno-inline-functions-called-once
918 endif                                             918 endif
919                                                   919 
920 # `rustc`'s `-Zfunction-sections` applies to d    920 # `rustc`'s `-Zfunction-sections` applies to data too (as of 1.59.0).
921 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION        921 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
922 KBUILD_CFLAGS_KERNEL += -ffunction-sections -f    922 KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections
923 KBUILD_RUSTFLAGS_KERNEL += -Zfunction-sections    923 KBUILD_RUSTFLAGS_KERNEL += -Zfunction-sections=y
924 LDFLAGS_vmlinux += --gc-sections                  924 LDFLAGS_vmlinux += --gc-sections
925 endif                                             925 endif
926                                                   926 
927 ifdef CONFIG_SHADOW_CALL_STACK                    927 ifdef CONFIG_SHADOW_CALL_STACK
928 ifndef CONFIG_DYNAMIC_SCS                         928 ifndef CONFIG_DYNAMIC_SCS
929 CC_FLAGS_SCS    := -fsanitize=shadow-call-stac    929 CC_FLAGS_SCS    := -fsanitize=shadow-call-stack
930 KBUILD_CFLAGS   += $(CC_FLAGS_SCS)                930 KBUILD_CFLAGS   += $(CC_FLAGS_SCS)
931 endif                                             931 endif
932 export CC_FLAGS_SCS                               932 export CC_FLAGS_SCS
933 endif                                             933 endif
934                                                   934 
935 ifdef CONFIG_LTO_CLANG                            935 ifdef CONFIG_LTO_CLANG
936 ifdef CONFIG_LTO_CLANG_THIN                       936 ifdef CONFIG_LTO_CLANG_THIN
937 CC_FLAGS_LTO    := -flto=thin -fsplit-lto-unit    937 CC_FLAGS_LTO    := -flto=thin -fsplit-lto-unit
938 else                                              938 else
939 CC_FLAGS_LTO    := -flto                          939 CC_FLAGS_LTO    := -flto
940 endif                                             940 endif
941 CC_FLAGS_LTO    += -fvisibility=hidden            941 CC_FLAGS_LTO    += -fvisibility=hidden
942                                                   942 
943 # Limit inlining across translation units to r    943 # Limit inlining across translation units to reduce binary size
944 KBUILD_LDFLAGS += -mllvm -import-instr-limit=5    944 KBUILD_LDFLAGS += -mllvm -import-instr-limit=5
945 endif                                             945 endif
946                                                   946 
947 ifdef CONFIG_LTO                                  947 ifdef CONFIG_LTO
948 KBUILD_CFLAGS   += -fno-lto $(CC_FLAGS_LTO)       948 KBUILD_CFLAGS   += -fno-lto $(CC_FLAGS_LTO)
949 KBUILD_AFLAGS   += -fno-lto                       949 KBUILD_AFLAGS   += -fno-lto
950 export CC_FLAGS_LTO                               950 export CC_FLAGS_LTO
951 endif                                             951 endif
952                                                   952 
953 ifdef CONFIG_CFI_CLANG                            953 ifdef CONFIG_CFI_CLANG
954 CC_FLAGS_CFI    := -fsanitize=kcfi                954 CC_FLAGS_CFI    := -fsanitize=kcfi
955 KBUILD_CFLAGS   += $(CC_FLAGS_CFI)                955 KBUILD_CFLAGS   += $(CC_FLAGS_CFI)
956 export CC_FLAGS_CFI                               956 export CC_FLAGS_CFI
957 endif                                             957 endif
958                                                   958 
959 # Architectures can define flags to add/remove    959 # Architectures can define flags to add/remove for floating-point support
960 CC_FLAGS_FPU    += -D_LINUX_FPU_COMPILATION_UN    960 CC_FLAGS_FPU    += -D_LINUX_FPU_COMPILATION_UNIT
961 export CC_FLAGS_FPU                               961 export CC_FLAGS_FPU
962 export CC_FLAGS_NO_FPU                            962 export CC_FLAGS_NO_FPU
963                                                   963 
964 ifneq ($(CONFIG_FUNCTION_ALIGNMENT),0)            964 ifneq ($(CONFIG_FUNCTION_ALIGNMENT),0)
965 # Set the minimal function alignment. Use the     965 # Set the minimal function alignment. Use the newer GCC option
966 # -fmin-function-alignment if it is available,    966 # -fmin-function-alignment if it is available, or fall back to -falign-funtions.
967 # See also CONFIG_CC_HAS_SANE_FUNCTION_ALIGNME    967 # See also CONFIG_CC_HAS_SANE_FUNCTION_ALIGNMENT.
968 ifdef CONFIG_CC_HAS_MIN_FUNCTION_ALIGNMENT        968 ifdef CONFIG_CC_HAS_MIN_FUNCTION_ALIGNMENT
969 KBUILD_CFLAGS += -fmin-function-alignment=$(CO    969 KBUILD_CFLAGS += -fmin-function-alignment=$(CONFIG_FUNCTION_ALIGNMENT)
970 else                                              970 else
971 KBUILD_CFLAGS += -falign-functions=$(CONFIG_FU    971 KBUILD_CFLAGS += -falign-functions=$(CONFIG_FUNCTION_ALIGNMENT)
972 endif                                             972 endif
973 endif                                             973 endif
974                                                   974 
975 # arch Makefile may override CC so keep this a    975 # arch Makefile may override CC so keep this after arch Makefile is included
976 NOSTDINC_FLAGS += -nostdinc                       976 NOSTDINC_FLAGS += -nostdinc
977                                                   977 
978 # To gain proper coverage for CONFIG_UBSAN_BOU    978 # To gain proper coverage for CONFIG_UBSAN_BOUNDS and CONFIG_FORTIFY_SOURCE,
979 # the kernel uses only C99 flexible arrays for    979 # the kernel uses only C99 flexible arrays for dynamically sized trailing
980 # arrays. Enforce this for everything that may    980 # arrays. Enforce this for everything that may examine structure sizes and
981 # perform bounds checking.                        981 # perform bounds checking.
982 KBUILD_CFLAGS += $(call cc-option, -fstrict-fl    982 KBUILD_CFLAGS += $(call cc-option, -fstrict-flex-arrays=3)
983                                                   983 
984 #Currently, disable -Wstringop-overflow for GC    984 #Currently, disable -Wstringop-overflow for GCC 11, globally.
985 KBUILD_CFLAGS-$(CONFIG_CC_NO_STRINGOP_OVERFLOW    985 KBUILD_CFLAGS-$(CONFIG_CC_NO_STRINGOP_OVERFLOW) += $(call cc-option, -Wno-stringop-overflow)
986 KBUILD_CFLAGS-$(CONFIG_CC_STRINGOP_OVERFLOW) +    986 KBUILD_CFLAGS-$(CONFIG_CC_STRINGOP_OVERFLOW) += $(call cc-option, -Wstringop-overflow)
987                                                   987 
988 # disable invalid "can't wrap" optimizations f    988 # disable invalid "can't wrap" optimizations for signed / pointers
989 KBUILD_CFLAGS   += -fno-strict-overflow           989 KBUILD_CFLAGS   += -fno-strict-overflow
990                                                   990 
991 # Make sure -fstack-check isn't enabled (like     991 # Make sure -fstack-check isn't enabled (like gentoo apparently did)
992 KBUILD_CFLAGS  += -fno-stack-check                992 KBUILD_CFLAGS  += -fno-stack-check
993                                                   993 
994 # conserve stack if available                     994 # conserve stack if available
995 ifdef CONFIG_CC_IS_GCC                            995 ifdef CONFIG_CC_IS_GCC
996 KBUILD_CFLAGS   += -fconserve-stack               996 KBUILD_CFLAGS   += -fconserve-stack
997 endif                                             997 endif
998                                                   998 
999 # change __FILE__ to the relative path from th    999 # change __FILE__ to the relative path from the srctree
1000 KBUILD_CPPFLAGS += $(call cc-option,-fmacro-p    1000 KBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
1001                                                  1001 
1002 # include additional Makefiles when needed       1002 # include additional Makefiles when needed
1003 include-y                       := scripts/Ma    1003 include-y                       := scripts/Makefile.extrawarn
1004 include-$(CONFIG_DEBUG_INFO)    += scripts/Ma    1004 include-$(CONFIG_DEBUG_INFO)    += scripts/Makefile.debug
1005 include-$(CONFIG_DEBUG_INFO_BTF)+= scripts/Ma    1005 include-$(CONFIG_DEBUG_INFO_BTF)+= scripts/Makefile.btf
1006 include-$(CONFIG_KASAN)         += scripts/Ma    1006 include-$(CONFIG_KASAN)         += scripts/Makefile.kasan
1007 include-$(CONFIG_KCSAN)         += scripts/Ma    1007 include-$(CONFIG_KCSAN)         += scripts/Makefile.kcsan
1008 include-$(CONFIG_KMSAN)         += scripts/Ma    1008 include-$(CONFIG_KMSAN)         += scripts/Makefile.kmsan
1009 include-$(CONFIG_UBSAN)         += scripts/Ma    1009 include-$(CONFIG_UBSAN)         += scripts/Makefile.ubsan
1010 include-$(CONFIG_KCOV)          += scripts/Ma    1010 include-$(CONFIG_KCOV)          += scripts/Makefile.kcov
1011 include-$(CONFIG_RANDSTRUCT)    += scripts/Ma    1011 include-$(CONFIG_RANDSTRUCT)    += scripts/Makefile.randstruct
1012 include-$(CONFIG_GCC_PLUGINS)   += scripts/Ma    1012 include-$(CONFIG_GCC_PLUGINS)   += scripts/Makefile.gcc-plugins
1013                                                  1013 
1014 include $(addprefix $(srctree)/, $(include-y)    1014 include $(addprefix $(srctree)/, $(include-y))
1015                                                  1015 
1016 # scripts/Makefile.gcc-plugins is intentional    1016 # scripts/Makefile.gcc-plugins is intentionally included last.
1017 # Do not add $(call cc-option,...) below this    1017 # Do not add $(call cc-option,...) below this line. When you build the kernel
1018 # from the clean source tree, the GCC plugins    1018 # from the clean source tree, the GCC plugins do not exist at this point.
1019                                                  1019 
1020 # Add user supplied CPPFLAGS, AFLAGS, CFLAGS     1020 # Add user supplied CPPFLAGS, AFLAGS, CFLAGS and RUSTFLAGS as the last assignments
1021 KBUILD_CPPFLAGS += $(KCPPFLAGS)                  1021 KBUILD_CPPFLAGS += $(KCPPFLAGS)
1022 KBUILD_AFLAGS   += $(KAFLAGS)                    1022 KBUILD_AFLAGS   += $(KAFLAGS)
1023 KBUILD_CFLAGS   += $(KCFLAGS)                    1023 KBUILD_CFLAGS   += $(KCFLAGS)
1024 KBUILD_RUSTFLAGS += $(KRUSTFLAGS)                1024 KBUILD_RUSTFLAGS += $(KRUSTFLAGS)
1025                                                  1025 
1026 KBUILD_LDFLAGS_MODULE += --build-id=sha1         1026 KBUILD_LDFLAGS_MODULE += --build-id=sha1
1027 LDFLAGS_vmlinux += --build-id=sha1               1027 LDFLAGS_vmlinux += --build-id=sha1
1028                                                  1028 
1029 KBUILD_LDFLAGS  += -z noexecstack                1029 KBUILD_LDFLAGS  += -z noexecstack
1030 ifeq ($(CONFIG_LD_IS_BFD),y)                     1030 ifeq ($(CONFIG_LD_IS_BFD),y)
1031 KBUILD_LDFLAGS  += $(call ld-option,--no-warn    1031 KBUILD_LDFLAGS  += $(call ld-option,--no-warn-rwx-segments)
1032 endif                                            1032 endif
1033                                                  1033 
1034 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)                1034 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
1035 LDFLAGS_vmlinux += -X                            1035 LDFLAGS_vmlinux += -X
1036 endif                                            1036 endif
1037                                                  1037 
1038 ifeq ($(CONFIG_RELR),y)                          1038 ifeq ($(CONFIG_RELR),y)
1039 # ld.lld before 15 did not support -z pack-re    1039 # ld.lld before 15 did not support -z pack-relative-relocs.
1040 LDFLAGS_vmlinux += $(call ld-option,--pack-dy    1040 LDFLAGS_vmlinux += $(call ld-option,--pack-dyn-relocs=relr,-z pack-relative-relocs)
1041 endif                                            1041 endif
1042                                                  1042 
1043 # We never want expected sections to be place    1043 # We never want expected sections to be placed heuristically by the
1044 # linker. All sections should be explicitly n    1044 # linker. All sections should be explicitly named in the linker script.
1045 ifdef CONFIG_LD_ORPHAN_WARN                      1045 ifdef CONFIG_LD_ORPHAN_WARN
1046 LDFLAGS_vmlinux += --orphan-handling=$(CONFIG    1046 LDFLAGS_vmlinux += --orphan-handling=$(CONFIG_LD_ORPHAN_WARN_LEVEL)
1047 endif                                            1047 endif
1048                                                  1048 
1049 # Align the bit size of userspace programs wi    1049 # Align the bit size of userspace programs with the kernel
1050 KBUILD_USERCFLAGS  += $(filter -m32 -m64 --ta    1050 KBUILD_USERCFLAGS  += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS))
1051 KBUILD_USERLDFLAGS += $(filter -m32 -m64 --ta    1051 KBUILD_USERLDFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS))
1052                                                  1052 
1053 # make the checker run with the right archite    1053 # make the checker run with the right architecture
1054 CHECKFLAGS += --arch=$(ARCH)                     1054 CHECKFLAGS += --arch=$(ARCH)
1055                                                  1055 
1056 # insure the checker run with the right endia    1056 # insure the checker run with the right endianness
1057 CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-    1057 CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian)
1058                                                  1058 
1059 # the checker needs the correct machine size     1059 # the checker needs the correct machine size
1060 CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32)    1060 CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32)
1061                                                  1061 
1062 # Default kernel image to build when no speci    1062 # Default kernel image to build when no specific target is given.
1063 # KBUILD_IMAGE may be overruled on the comman    1063 # KBUILD_IMAGE may be overruled on the command line or
1064 # set in the environment                         1064 # set in the environment
1065 # Also any assignments in arch/$(ARCH)/Makefi    1065 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
1066 # this default value                             1066 # this default value
1067 export KBUILD_IMAGE ?= vmlinux                   1067 export KBUILD_IMAGE ?= vmlinux
1068                                                  1068 
1069 #                                                1069 #
1070 # INSTALL_PATH specifies where to place the u    1070 # INSTALL_PATH specifies where to place the updated kernel and system map
1071 # images. Default is /boot, but you can set i    1071 # images. Default is /boot, but you can set it to other values
1072 export  INSTALL_PATH ?= /boot                    1072 export  INSTALL_PATH ?= /boot
1073                                                  1073 
1074 #                                                1074 #
1075 # INSTALL_DTBS_PATH specifies a prefix for re    1075 # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
1076 # Like INSTALL_MOD_PATH, it isn't defined in     1076 # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
1077 # an argument if needed. Otherwise it default    1077 # an argument if needed. Otherwise it defaults to the kernel install path
1078 #                                                1078 #
1079 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/d    1079 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
1080                                                  1080 
1081 #                                                1081 #
1082 # INSTALL_MOD_PATH specifies a prefix to MODL    1082 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
1083 # relocations required by build roots.  This     1083 # relocations required by build roots.  This is not defined in the
1084 # makefile but the argument can be passed to     1084 # makefile but the argument can be passed to make if needed.
1085 #                                                1085 #
1086                                                  1086 
1087 MODLIB  = $(INSTALL_MOD_PATH)/lib/modules/$(K    1087 MODLIB  = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
1088 export MODLIB                                    1088 export MODLIB
1089                                                  1089 
1090 PHONY += prepare0                                1090 PHONY += prepare0
1091                                                  1091 
1092 export extmod_prefix = $(if $(KBUILD_EXTMOD),    1092 export extmod_prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/)
1093 export MODORDER := $(extmod_prefix)modules.or    1093 export MODORDER := $(extmod_prefix)modules.order
1094 export MODULES_NSDEPS := $(extmod_prefix)modu    1094 export MODULES_NSDEPS := $(extmod_prefix)modules.nsdeps
1095                                                  1095 
1096 ifeq ($(KBUILD_EXTMOD),)                         1096 ifeq ($(KBUILD_EXTMOD),)
1097                                                  1097 
1098 build-dir       := .                             1098 build-dir       := .
1099 clean-dirs      := $(sort . Documentation \      1099 clean-dirs      := $(sort . Documentation \
1100                      $(patsubst %/,%,$(filter    1100                      $(patsubst %/,%,$(filter %/, $(core-) \
1101                         $(drivers-) $(libs-))    1101                         $(drivers-) $(libs-))))
1102                                                  1102 
1103 export ARCH_CORE        := $(core-y)             1103 export ARCH_CORE        := $(core-y)
1104 export ARCH_LIB         := $(filter %/, $(lib    1104 export ARCH_LIB         := $(filter %/, $(libs-y))
1105 export ARCH_DRIVERS     := $(drivers-y) $(dri    1105 export ARCH_DRIVERS     := $(drivers-y) $(drivers-m)
1106 # Externally visible symbols (used by link-vm    1106 # Externally visible symbols (used by link-vmlinux.sh)
1107                                                  1107 
1108 KBUILD_VMLINUX_OBJS := ./built-in.a              1108 KBUILD_VMLINUX_OBJS := ./built-in.a
1109 ifdef CONFIG_MODULES                             1109 ifdef CONFIG_MODULES
1110 KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a    1110 KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y)))
1111 KBUILD_VMLINUX_LIBS := $(filter-out %/, $(lib    1111 KBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y))
1112 else                                             1112 else
1113 KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a,    1113 KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, $(libs-y))
1114 endif                                            1114 endif
1115                                                  1115 
1116 export KBUILD_VMLINUX_LIBS                       1116 export KBUILD_VMLINUX_LIBS
1117 export KBUILD_LDS          := arch/$(SRCARCH)    1117 export KBUILD_LDS          := arch/$(SRCARCH)/kernel/vmlinux.lds
1118                                                  1118 
1119 ifdef CONFIG_TRIM_UNUSED_KSYMS                   1119 ifdef CONFIG_TRIM_UNUSED_KSYMS
1120 # For the kernel to actually contain only the    1120 # For the kernel to actually contain only the needed exported symbols,
1121 # we have to build modules as well to determi    1121 # we have to build modules as well to determine what those symbols are.
1122 KBUILD_MODULES := 1                              1122 KBUILD_MODULES := 1
1123 endif                                            1123 endif
1124                                                  1124 
1125 # '$(AR) mPi' needs 'T' to workaround the bug    1125 # '$(AR) mPi' needs 'T' to workaround the bug of llvm-ar <= 14
1126 quiet_cmd_ar_vmlinux.a = AR      $@              1126 quiet_cmd_ar_vmlinux.a = AR      $@
1127       cmd_ar_vmlinux.a = \                       1127       cmd_ar_vmlinux.a = \
1128         rm -f $@; \                              1128         rm -f $@; \
1129         $(AR) cDPrST $@ $(KBUILD_VMLINUX_OBJS    1129         $(AR) cDPrST $@ $(KBUILD_VMLINUX_OBJS); \
1130         $(AR) mPiT $$($(AR) t $@ | sed -n 1p)    1130         $(AR) mPiT $$($(AR) t $@ | sed -n 1p) $@ $$($(AR) t $@ | grep -F -f $(srctree)/scripts/head-object-list.txt)
1131                                                  1131 
1132 targets += vmlinux.a                             1132 targets += vmlinux.a
1133 vmlinux.a: $(KBUILD_VMLINUX_OBJS) scripts/hea    1133 vmlinux.a: $(KBUILD_VMLINUX_OBJS) scripts/head-object-list.txt FORCE
1134         $(call if_changed,ar_vmlinux.a)          1134         $(call if_changed,ar_vmlinux.a)
1135                                                  1135 
1136 PHONY += vmlinux_o                               1136 PHONY += vmlinux_o
1137 vmlinux_o: vmlinux.a $(KBUILD_VMLINUX_LIBS)      1137 vmlinux_o: vmlinux.a $(KBUILD_VMLINUX_LIBS)
1138         $(Q)$(MAKE) -f $(srctree)/scripts/Mak    1138         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vmlinux_o
1139                                                  1139 
1140 vmlinux.o modules.builtin.modinfo modules.bui    1140 vmlinux.o modules.builtin.modinfo modules.builtin: vmlinux_o
1141         @:                                       1141         @:
1142                                                  1142 
1143 PHONY += vmlinux                                 1143 PHONY += vmlinux
1144 # LDFLAGS_vmlinux in the top Makefile defines    1144 # LDFLAGS_vmlinux in the top Makefile defines linker flags for the top vmlinux,
1145 # not for decompressors. LDFLAGS_vmlinux in a    1145 # not for decompressors. LDFLAGS_vmlinux in arch/*/boot/compressed/Makefile is
1146 # unrelated; the decompressors just happen to    1146 # unrelated; the decompressors just happen to have the same base name,
1147 # arch/*/boot/compressed/vmlinux.                1147 # arch/*/boot/compressed/vmlinux.
1148 # Export LDFLAGS_vmlinux only to scripts/Make    1148 # Export LDFLAGS_vmlinux only to scripts/Makefile.vmlinux.
1149 #                                                1149 #
1150 # _LDFLAGS_vmlinux is a workaround for the 'p    1150 # _LDFLAGS_vmlinux is a workaround for the 'private export' bug:
1151 #   https://savannah.gnu.org/bugs/?61463         1151 #   https://savannah.gnu.org/bugs/?61463
1152 # For Make > 4.4, the following simple code w    1152 # For Make > 4.4, the following simple code will work:
1153 #  vmlinux: private export LDFLAGS_vmlinux :=    1153 #  vmlinux: private export LDFLAGS_vmlinux := $(LDFLAGS_vmlinux)
1154 vmlinux: private _LDFLAGS_vmlinux := $(LDFLAG    1154 vmlinux: private _LDFLAGS_vmlinux := $(LDFLAGS_vmlinux)
1155 vmlinux: export LDFLAGS_vmlinux = $(_LDFLAGS_    1155 vmlinux: export LDFLAGS_vmlinux = $(_LDFLAGS_vmlinux)
1156 vmlinux: vmlinux.o $(KBUILD_LDS) modpost         1156 vmlinux: vmlinux.o $(KBUILD_LDS) modpost
1157         $(Q)$(MAKE) -f $(srctree)/scripts/Mak    1157         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vmlinux
1158                                                  1158 
1159 # The actual objects are generated when desce    1159 # The actual objects are generated when descending,
1160 # make sure no implicit rule kicks in            1160 # make sure no implicit rule kicks in
1161 $(sort $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $    1161 $(sort $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)): . ;
1162                                                  1162 
1163 ifeq ($(origin KERNELRELEASE),file)              1163 ifeq ($(origin KERNELRELEASE),file)
1164 filechk_kernel.release = $(srctree)/scripts/s    1164 filechk_kernel.release = $(srctree)/scripts/setlocalversion $(srctree)
1165 else                                             1165 else
1166 filechk_kernel.release = echo $(KERNELRELEASE    1166 filechk_kernel.release = echo $(KERNELRELEASE)
1167 endif                                            1167 endif
1168                                                  1168 
1169 # Store (new) KERNELRELEASE string in include    1169 # Store (new) KERNELRELEASE string in include/config/kernel.release
1170 include/config/kernel.release: FORCE             1170 include/config/kernel.release: FORCE
1171         $(call filechk,kernel.release)           1171         $(call filechk,kernel.release)
1172                                                  1172 
1173 # Additional helpers built in scripts/           1173 # Additional helpers built in scripts/
1174 # Carefully list dependencies so we do not tr    1174 # Carefully list dependencies so we do not try to build scripts twice
1175 # in parallel                                    1175 # in parallel
1176 PHONY += scripts                                 1176 PHONY += scripts
1177 scripts: scripts_basic scripts_dtc               1177 scripts: scripts_basic scripts_dtc
1178         $(Q)$(MAKE) $(build)=$(@)                1178         $(Q)$(MAKE) $(build)=$(@)
1179                                                  1179 
1180 # Things we need to do before we recursively     1180 # Things we need to do before we recursively start building the kernel
1181 # or the modules are listed in "prepare".        1181 # or the modules are listed in "prepare".
1182 # A multi level approach is used. prepareN is    1182 # A multi level approach is used. prepareN is processed before prepareN-1.
1183 # archprepare is used in arch Makefiles and w    1183 # archprepare is used in arch Makefiles and when processed asm symlink,
1184 # version.h and scripts_basic is processed /     1184 # version.h and scripts_basic is processed / created.
1185                                                  1185 
1186 PHONY += prepare archprepare                     1186 PHONY += prepare archprepare
1187                                                  1187 
1188 archprepare: outputmakefile archheaders archs    1188 archprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \
1189         asm-generic $(version_h) include/gene    1189         asm-generic $(version_h) include/generated/utsrelease.h \
1190         include/generated/compile.h include/g    1190         include/generated/compile.h include/generated/autoconf.h remove-stale-files
1191                                                  1191 
1192 prepare0: archprepare                            1192 prepare0: archprepare
1193         $(Q)$(MAKE) $(build)=scripts/mod         1193         $(Q)$(MAKE) $(build)=scripts/mod
1194         $(Q)$(MAKE) $(build)=. prepare           1194         $(Q)$(MAKE) $(build)=. prepare
1195                                                  1195 
1196 # All the preparing..                            1196 # All the preparing..
1197 prepare: prepare0                                1197 prepare: prepare0
1198 ifdef CONFIG_RUST                                1198 ifdef CONFIG_RUST
1199         +$(Q)$(CONFIG_SHELL) $(srctree)/scrip    1199         +$(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh
1200         $(Q)$(MAKE) $(build)=rust                1200         $(Q)$(MAKE) $(build)=rust
1201 endif                                            1201 endif
1202                                                  1202 
1203 PHONY += remove-stale-files                      1203 PHONY += remove-stale-files
1204 remove-stale-files:                              1204 remove-stale-files:
1205         $(Q)$(srctree)/scripts/remove-stale-f    1205         $(Q)$(srctree)/scripts/remove-stale-files
1206                                                  1206 
1207 # Support for using generic headers in asm-ge    1207 # Support for using generic headers in asm-generic
1208 asm-generic := -f $(srctree)/scripts/Makefile    1208 asm-generic := -f $(srctree)/scripts/Makefile.asm-headers obj
1209                                                  1209 
1210 PHONY += asm-generic uapi-asm-generic            1210 PHONY += asm-generic uapi-asm-generic
1211 asm-generic: uapi-asm-generic                    1211 asm-generic: uapi-asm-generic
1212         $(Q)$(MAKE) $(asm-generic)=arch/$(SRC    1212         $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \
1213         generic=include/asm-generic              1213         generic=include/asm-generic
1214 uapi-asm-generic:                                1214 uapi-asm-generic:
1215         $(Q)$(MAKE) $(asm-generic)=arch/$(SRC    1215         $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \
1216         generic=include/uapi/asm-generic         1216         generic=include/uapi/asm-generic
1217                                                  1217 
1218 # Generate some files                            1218 # Generate some files
1219 # -------------------------------------------    1219 # ---------------------------------------------------------------------------
1220                                                  1220 
1221 # KERNELRELEASE can change from a few differe    1221 # KERNELRELEASE can change from a few different places, meaning version.h
1222 # needs to be updated, so this check is force    1222 # needs to be updated, so this check is forced on all builds
1223                                                  1223 
1224 uts_len := 64                                    1224 uts_len := 64
1225 define filechk_utsrelease.h                      1225 define filechk_utsrelease.h
1226         if [ `echo -n "$(KERNELRELEASE)" | wc    1226         if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1227           echo '"$(KERNELRELEASE)" exceeds $(    1227           echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
1228           exit 1;                                1228           exit 1;                                                         \
1229         fi;                                      1229         fi;                                                               \
1230         echo \#define UTS_RELEASE \"$(KERNELR    1230         echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"
1231 endef                                            1231 endef
1232                                                  1232 
1233 define filechk_version.h                         1233 define filechk_version.h
1234         if [ $(SUBLEVEL) -gt 255 ]; then         1234         if [ $(SUBLEVEL) -gt 255 ]; then                                 \
1235                 echo \#define LINUX_VERSION_C    1235                 echo \#define LINUX_VERSION_CODE $(shell                 \
1236                 expr $(VERSION) \* 65536 + $(    1236                 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + 255); \
1237         else                                     1237         else                                                             \
1238                 echo \#define LINUX_VERSION_C    1238                 echo \#define LINUX_VERSION_CODE $(shell                 \
1239                 expr $(VERSION) \* 65536 + $(    1239                 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
1240         fi;                                      1240         fi;                                                              \
1241         echo '#define KERNEL_VERSION(a,b,c) (    1241         echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) +  \
1242         ((c) > 255 ? 255 : (c)))';               1242         ((c) > 255 ? 255 : (c)))';                                       \
1243         echo \#define LINUX_VERSION_MAJOR $(V    1243         echo \#define LINUX_VERSION_MAJOR $(VERSION);                    \
1244         echo \#define LINUX_VERSION_PATCHLEVE    1244         echo \#define LINUX_VERSION_PATCHLEVEL $(PATCHLEVEL);            \
1245         echo \#define LINUX_VERSION_SUBLEVEL     1245         echo \#define LINUX_VERSION_SUBLEVEL $(SUBLEVEL)
1246 endef                                            1246 endef
1247                                                  1247 
1248 $(version_h): private PATCHLEVEL := $(or $(PA    1248 $(version_h): private PATCHLEVEL := $(or $(PATCHLEVEL), 0)
1249 $(version_h): private SUBLEVEL := $(or $(SUBL    1249 $(version_h): private SUBLEVEL := $(or $(SUBLEVEL), 0)
1250 $(version_h): FORCE                              1250 $(version_h): FORCE
1251         $(call filechk,version.h)                1251         $(call filechk,version.h)
1252                                                  1252 
1253 include/generated/utsrelease.h: include/confi    1253 include/generated/utsrelease.h: include/config/kernel.release FORCE
1254         $(call filechk,utsrelease.h)             1254         $(call filechk,utsrelease.h)
1255                                                  1255 
1256 filechk_compile.h = $(srctree)/scripts/mkcomp    1256 filechk_compile.h = $(srctree)/scripts/mkcompile_h \
1257         "$(UTS_MACHINE)" "$(CONFIG_CC_VERSION    1257         "$(UTS_MACHINE)" "$(CONFIG_CC_VERSION_TEXT)" "$(LD)"
1258                                                  1258 
1259 include/generated/compile.h: FORCE               1259 include/generated/compile.h: FORCE
1260         $(call filechk,compile.h)                1260         $(call filechk,compile.h)
1261                                                  1261 
1262 PHONY += headerdep                               1262 PHONY += headerdep
1263 headerdep:                                       1263 headerdep:
1264         $(Q)find $(srctree)/include/ -name '*    1264         $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
1265         $(srctree)/scripts/headerdep.pl -I$(s    1265         $(srctree)/scripts/headerdep.pl -I$(srctree)/include
1266                                                  1266 
1267 # -------------------------------------------    1267 # ---------------------------------------------------------------------------
1268 # Kernel headers                                 1268 # Kernel headers
1269                                                  1269 
1270 #Default location for installed headers          1270 #Default location for installed headers
1271 export INSTALL_HDR_PATH = $(objtree)/usr         1271 export INSTALL_HDR_PATH = $(objtree)/usr
1272                                                  1272 
1273 quiet_cmd_headers_install = INSTALL $(INSTALL    1273 quiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include
1274       cmd_headers_install = \                    1274       cmd_headers_install = \
1275         mkdir -p $(INSTALL_HDR_PATH); \          1275         mkdir -p $(INSTALL_HDR_PATH); \
1276         rsync -mrl --include='*/' --include='    1276         rsync -mrl --include='*/' --include='*\.h' --exclude='*' \
1277         usr/include $(INSTALL_HDR_PATH)          1277         usr/include $(INSTALL_HDR_PATH)
1278                                                  1278 
1279 PHONY += headers_install                         1279 PHONY += headers_install
1280 headers_install: headers                         1280 headers_install: headers
1281         $(call cmd,headers_install)              1281         $(call cmd,headers_install)
1282                                                  1282 
1283 PHONY += archheaders archscripts                 1283 PHONY += archheaders archscripts
1284                                                  1284 
1285 hdr-inst := -f $(srctree)/scripts/Makefile.he    1285 hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj
1286                                                  1286 
1287 PHONY += headers                                 1287 PHONY += headers
1288 headers: $(version_h) scripts_unifdef uapi-as    1288 headers: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts
1289         $(if $(filter um, $(SRCARCH)), $(erro    1289         $(if $(filter um, $(SRCARCH)), $(error Headers not exportable for UML))
1290         $(Q)$(MAKE) $(hdr-inst)=include/uapi     1290         $(Q)$(MAKE) $(hdr-inst)=include/uapi
1291         $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARC    1291         $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi
1292                                                  1292 
1293 ifdef CONFIG_HEADERS_INSTALL                     1293 ifdef CONFIG_HEADERS_INSTALL
1294 prepare: headers                                 1294 prepare: headers
1295 endif                                            1295 endif
1296                                                  1296 
1297 PHONY += scripts_unifdef                         1297 PHONY += scripts_unifdef
1298 scripts_unifdef: scripts_basic                   1298 scripts_unifdef: scripts_basic
1299         $(Q)$(MAKE) $(build)=scripts scripts/    1299         $(Q)$(MAKE) $(build)=scripts scripts/unifdef
1300                                                  1300 
1301 # -------------------------------------------    1301 # ---------------------------------------------------------------------------
1302 # Install                                        1302 # Install
1303                                                  1303 
1304 # Many distributions have the custom install     1304 # Many distributions have the custom install script, /sbin/installkernel.
1305 # If DKMS is installed, 'make install' will e    1305 # If DKMS is installed, 'make install' will eventually recurse back
1306 # to this Makefile to build and install exter    1306 # to this Makefile to build and install external modules.
1307 # Cancel sub_make_done so that options such a    1307 # Cancel sub_make_done so that options such as M=, V=, etc. are parsed.
1308                                                  1308 
1309 quiet_cmd_install = INSTALL $(INSTALL_PATH)      1309 quiet_cmd_install = INSTALL $(INSTALL_PATH)
1310       cmd_install = unset sub_make_done; $(sr    1310       cmd_install = unset sub_make_done; $(srctree)/scripts/install.sh
1311                                                  1311 
1312 # -------------------------------------------    1312 # ---------------------------------------------------------------------------
1313 # vDSO install                                   1313 # vDSO install
1314                                                  1314 
1315 PHONY += vdso_install                            1315 PHONY += vdso_install
1316 vdso_install: export INSTALL_FILES = $(vdso-i    1316 vdso_install: export INSTALL_FILES = $(vdso-install-y)
1317 vdso_install:                                    1317 vdso_install:
1318         $(Q)$(MAKE) -f $(srctree)/scripts/Mak    1318         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vdsoinst
1319                                                  1319 
1320 # -------------------------------------------    1320 # ---------------------------------------------------------------------------
1321 # Tools                                          1321 # Tools
1322                                                  1322 
1323 ifdef CONFIG_OBJTOOL                             1323 ifdef CONFIG_OBJTOOL
1324 prepare: tools/objtool                           1324 prepare: tools/objtool
1325 endif                                            1325 endif
1326                                                  1326 
1327 ifdef CONFIG_BPF                                 1327 ifdef CONFIG_BPF
1328 ifdef CONFIG_DEBUG_INFO_BTF                      1328 ifdef CONFIG_DEBUG_INFO_BTF
1329 prepare: tools/bpf/resolve_btfids                1329 prepare: tools/bpf/resolve_btfids
1330 endif                                            1330 endif
1331 endif                                            1331 endif
1332                                                  1332 
1333 # The tools build system is not a part of Kbu    1333 # The tools build system is not a part of Kbuild and tends to introduce
1334 # its own unique issues. If you need to integ    1334 # its own unique issues. If you need to integrate a new tool into Kbuild,
1335 # please consider locating that tool outside     1335 # please consider locating that tool outside the tools/ tree and using the
1336 # standard Kbuild "hostprogs" syntax instead     1336 # standard Kbuild "hostprogs" syntax instead of adding a new tools/* entry
1337 # here. See Documentation/kbuild/makefiles.rs    1337 # here. See Documentation/kbuild/makefiles.rst for details.
1338                                                  1338 
1339 PHONY += resolve_btfids_clean                    1339 PHONY += resolve_btfids_clean
1340                                                  1340 
1341 resolve_btfids_O = $(abspath $(objtree))/tool    1341 resolve_btfids_O = $(abspath $(objtree))/tools/bpf/resolve_btfids
1342                                                  1342 
1343 # tools/bpf/resolve_btfids directory might no    1343 # tools/bpf/resolve_btfids directory might not exist
1344 # in output directory, skip its clean in that    1344 # in output directory, skip its clean in that case
1345 resolve_btfids_clean:                            1345 resolve_btfids_clean:
1346 ifneq ($(wildcard $(resolve_btfids_O)),)         1346 ifneq ($(wildcard $(resolve_btfids_O)),)
1347         $(Q)$(MAKE) -sC $(srctree)/tools/bpf/    1347         $(Q)$(MAKE) -sC $(srctree)/tools/bpf/resolve_btfids O=$(resolve_btfids_O) clean
1348 endif                                            1348 endif
1349                                                  1349 
1350 # Clear a bunch of variables before executing    1350 # Clear a bunch of variables before executing the submake
1351 ifeq ($(quiet),silent_)                          1351 ifeq ($(quiet),silent_)
1352 tools_silent=s                                   1352 tools_silent=s
1353 endif                                            1353 endif
1354                                                  1354 
1355 tools/: FORCE                                    1355 tools/: FORCE
1356         $(Q)mkdir -p $(objtree)/tools            1356         $(Q)mkdir -p $(objtree)/tools
1357         $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(too    1357         $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/
1358                                                  1358 
1359 tools/%: FORCE                                   1359 tools/%: FORCE
1360         $(Q)mkdir -p $(objtree)/tools            1360         $(Q)mkdir -p $(objtree)/tools
1361         $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(too    1361         $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $*
1362                                                  1362 
1363 # -------------------------------------------    1363 # ---------------------------------------------------------------------------
1364 # Kernel selftest                                1364 # Kernel selftest
1365                                                  1365 
1366 PHONY += kselftest                               1366 PHONY += kselftest
1367 kselftest: headers                               1367 kselftest: headers
1368         $(Q)$(MAKE) -C $(srctree)/tools/testi    1368         $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests
1369                                                  1369 
1370 kselftest-%: headers FORCE                       1370 kselftest-%: headers FORCE
1371         $(Q)$(MAKE) -C $(srctree)/tools/testi    1371         $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $*
1372                                                  1372 
1373 PHONY += kselftest-merge                         1373 PHONY += kselftest-merge
1374 kselftest-merge:                                 1374 kselftest-merge:
1375         $(if $(wildcard $(objtree)/.config),,    1375         $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
1376         $(Q)find $(srctree)/tools/testing/sel    1376         $(Q)find $(srctree)/tools/testing/selftests -name config -o -name config.$(UTS_MACHINE) | \
1377                 xargs $(srctree)/scripts/kcon    1377                 xargs $(srctree)/scripts/kconfig/merge_config.sh -y -m $(objtree)/.config
1378         $(Q)$(MAKE) -f $(srctree)/Makefile ol    1378         $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
1379                                                  1379 
1380 # -------------------------------------------    1380 # ---------------------------------------------------------------------------
1381 # Devicetree files                               1381 # Devicetree files
1382                                                  1382 
1383 ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/    1383 ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),)
1384 dtstree := arch/$(SRCARCH)/boot/dts              1384 dtstree := arch/$(SRCARCH)/boot/dts
1385 endif                                            1385 endif
1386                                                  1386 
1387 ifneq ($(dtstree),)                              1387 ifneq ($(dtstree),)
1388                                                  1388 
1389 %.dtb: dtbs_prepare                              1389 %.dtb: dtbs_prepare
1390         $(Q)$(MAKE) $(build)=$(dtstree) $(dts    1390         $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
1391                                                  1391 
1392 %.dtbo: dtbs_prepare                             1392 %.dtbo: dtbs_prepare
1393         $(Q)$(MAKE) $(build)=$(dtstree) $(dts    1393         $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
1394                                                  1394 
1395 PHONY += dtbs dtbs_prepare dtbs_install dtbs_    1395 PHONY += dtbs dtbs_prepare dtbs_install dtbs_check
1396 dtbs: dtbs_prepare                               1396 dtbs: dtbs_prepare
1397         $(Q)$(MAKE) $(build)=$(dtstree) need-    1397         $(Q)$(MAKE) $(build)=$(dtstree) need-dtbslist=1
1398                                                  1398 
1399 # include/config/kernel.release is actually n    1399 # include/config/kernel.release is actually needed when installing DTBs because
1400 # INSTALL_DTBS_PATH contains $(KERNELRELEASE)    1400 # INSTALL_DTBS_PATH contains $(KERNELRELEASE). However, we do not want to make
1401 # dtbs_install depend on it as dtbs_install m    1401 # dtbs_install depend on it as dtbs_install may run as root.
1402 dtbs_prepare: include/config/kernel.release s    1402 dtbs_prepare: include/config/kernel.release scripts_dtc
1403                                                  1403 
1404 ifneq ($(filter dtbs_check, $(MAKECMDGOALS)),    1404 ifneq ($(filter dtbs_check, $(MAKECMDGOALS)),)
1405 export CHECK_DTBS=y                              1405 export CHECK_DTBS=y
1406 endif                                            1406 endif
1407                                                  1407 
1408 ifneq ($(CHECK_DTBS),)                           1408 ifneq ($(CHECK_DTBS),)
1409 dtbs_prepare: dt_binding_schemas                 1409 dtbs_prepare: dt_binding_schemas
1410 endif                                            1410 endif
1411                                                  1411 
1412 dtbs_check: dtbs                                 1412 dtbs_check: dtbs
1413                                                  1413 
1414 dtbs_install:                                    1414 dtbs_install:
1415         $(Q)$(MAKE) -f $(srctree)/scripts/Mak    1415         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.dtbinst obj=$(dtstree)
1416                                                  1416 
1417 ifdef CONFIG_OF_EARLY_FLATTREE                   1417 ifdef CONFIG_OF_EARLY_FLATTREE
1418 all: dtbs                                        1418 all: dtbs
1419 endif                                            1419 endif
1420                                                  1420 
1421 endif                                            1421 endif
1422                                                  1422 
1423 PHONY += scripts_dtc                             1423 PHONY += scripts_dtc
1424 scripts_dtc: scripts_basic                       1424 scripts_dtc: scripts_basic
1425         $(Q)$(MAKE) $(build)=scripts/dtc         1425         $(Q)$(MAKE) $(build)=scripts/dtc
1426                                                  1426 
1427 ifneq ($(filter dt_binding_check, $(MAKECMDGO    1427 ifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),)
1428 export CHECK_DTBS=y                              1428 export CHECK_DTBS=y
1429 endif                                            1429 endif
1430                                                  1430 
1431 PHONY += dt_binding_check dt_binding_schemas     1431 PHONY += dt_binding_check dt_binding_schemas
1432 dt_binding_check: dt_binding_schemas scripts_    1432 dt_binding_check: dt_binding_schemas scripts_dtc
1433         $(Q)$(MAKE) $(build)=Documentation/de    1433         $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings $@
1434                                                  1434 
1435 dt_binding_schemas:                              1435 dt_binding_schemas:
1436         $(Q)$(MAKE) $(build)=Documentation/de    1436         $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings
1437                                                  1437 
1438 PHONY += dt_compatible_check                     1438 PHONY += dt_compatible_check
1439 dt_compatible_check: dt_binding_schemas          1439 dt_compatible_check: dt_binding_schemas
1440         $(Q)$(MAKE) $(build)=Documentation/de    1440         $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings $@
1441                                                  1441 
1442 # -------------------------------------------    1442 # ---------------------------------------------------------------------------
1443 # Modules                                        1443 # Modules
1444                                                  1444 
1445 ifdef CONFIG_MODULES                             1445 ifdef CONFIG_MODULES
1446                                                  1446 
1447 # By default, build modules as well              1447 # By default, build modules as well
1448                                                  1448 
1449 all: modules                                     1449 all: modules
1450                                                  1450 
1451 # When we're building modules with modversion    1451 # When we're building modules with modversions, we need to consider
1452 # the built-in objects during the descend as     1452 # the built-in objects during the descend as well, in order to
1453 # make sure the checksums are up to date befo    1453 # make sure the checksums are up to date before we record them.
1454 ifdef CONFIG_MODVERSIONS                         1454 ifdef CONFIG_MODVERSIONS
1455   KBUILD_BUILTIN := 1                            1455   KBUILD_BUILTIN := 1
1456 endif                                            1456 endif
1457                                                  1457 
1458 # Build modules                                  1458 # Build modules
1459 #                                                1459 #
1460                                                  1460 
1461 # *.ko are usually independent of vmlinux, bu    1461 # *.ko are usually independent of vmlinux, but CONFIG_DEBUG_INFO_BTF_MODULES
1462 # is an exception.                               1462 # is an exception.
1463 ifdef CONFIG_DEBUG_INFO_BTF_MODULES              1463 ifdef CONFIG_DEBUG_INFO_BTF_MODULES
1464 KBUILD_BUILTIN := 1                              1464 KBUILD_BUILTIN := 1
1465 modules: vmlinux                                 1465 modules: vmlinux
1466 endif                                            1466 endif
1467                                                  1467 
1468 modules: modules_prepare                         1468 modules: modules_prepare
1469                                                  1469 
1470 # Target to prepare building external modules    1470 # Target to prepare building external modules
1471 modules_prepare: prepare                         1471 modules_prepare: prepare
1472         $(Q)$(MAKE) $(build)=scripts scripts/    1472         $(Q)$(MAKE) $(build)=scripts scripts/module.lds
1473                                                  1473 
1474 endif # CONFIG_MODULES                           1474 endif # CONFIG_MODULES
1475                                                  1475 
1476 ###                                              1476 ###
1477 # Cleaning is done on three levels.              1477 # Cleaning is done on three levels.
1478 # make clean     Delete most generated files     1478 # make clean     Delete most generated files
1479 #                Leave enough to build extern    1479 #                Leave enough to build external modules
1480 # make mrproper  Delete the current configura    1480 # make mrproper  Delete the current configuration, and all generated files
1481 # make distclean Remove editor backup files,     1481 # make distclean Remove editor backup files, patch leftover files and the like
1482                                                  1482 
1483 # Directories & files removed with 'make clea    1483 # Directories & files removed with 'make clean'
1484 CLEAN_FILES += vmlinux.symvers modules-only.s    1484 CLEAN_FILES += vmlinux.symvers modules-only.symvers \
1485                modules.builtin modules.builti    1485                modules.builtin modules.builtin.modinfo modules.nsdeps \
1486                compile_commands.json rust/tes    1486                compile_commands.json rust/test \
1487                rust-project.json .vmlinux.obj    1487                rust-project.json .vmlinux.objs .vmlinux.export.c
1488                                                  1488 
1489 # Directories & files removed with 'make mrpr    1489 # Directories & files removed with 'make mrproper'
1490 MRPROPER_FILES += include/config include/gene    1490 MRPROPER_FILES += include/config include/generated          \
1491                   arch/$(SRCARCH)/include/gen    1491                   arch/$(SRCARCH)/include/generated .objdiff \
1492                   debian snap tar-install PKG    1492                   debian snap tar-install PKGBUILD pacman \
1493                   .config .config.old .versio    1493                   .config .config.old .version \
1494                   Module.symvers \               1494                   Module.symvers \
1495                   certs/signing_key.pem \        1495                   certs/signing_key.pem \
1496                   certs/x509.genkey \            1496                   certs/x509.genkey \
1497                   vmlinux-gdb.py \               1497                   vmlinux-gdb.py \
1498                   rpmbuild \                     1498                   rpmbuild \
1499                   rust/libmacros.so              1499                   rust/libmacros.so
1500                                                  1500 
1501 # clean - Delete most, but leave enough to bu    1501 # clean - Delete most, but leave enough to build external modules
1502 #                                                1502 #
1503 clean: private rm-files := $(CLEAN_FILES)        1503 clean: private rm-files := $(CLEAN_FILES)
1504                                                  1504 
1505 PHONY += archclean vmlinuxclean                  1505 PHONY += archclean vmlinuxclean
1506                                                  1506 
1507 vmlinuxclean:                                    1507 vmlinuxclean:
1508         $(Q)$(CONFIG_SHELL) $(srctree)/script    1508         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1509         $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f    1509         $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
1510                                                  1510 
1511 clean: archclean vmlinuxclean resolve_btfids_    1511 clean: archclean vmlinuxclean resolve_btfids_clean
1512                                                  1512 
1513 # mrproper - Delete all generated files, incl    1513 # mrproper - Delete all generated files, including .config
1514 #                                                1514 #
1515 mrproper: private rm-files := $(MRPROPER_FILE    1515 mrproper: private rm-files := $(MRPROPER_FILES)
1516 mrproper-dirs      := $(addprefix _mrproper_,    1516 mrproper-dirs      := $(addprefix _mrproper_,scripts)
1517                                                  1517 
1518 PHONY += $(mrproper-dirs) mrproper               1518 PHONY += $(mrproper-dirs) mrproper
1519 $(mrproper-dirs):                                1519 $(mrproper-dirs):
1520         $(Q)$(MAKE) $(clean)=$(patsubst _mrpr    1520         $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1521                                                  1521 
1522 mrproper: clean $(mrproper-dirs)                 1522 mrproper: clean $(mrproper-dirs)
1523         $(call cmd,rmfiles)                      1523         $(call cmd,rmfiles)
1524         @find . $(RCS_FIND_IGNORE) \             1524         @find . $(RCS_FIND_IGNORE) \
1525                 \( -name '*.rmeta' \) \          1525                 \( -name '*.rmeta' \) \
1526                 -type f -print | xargs rm -f     1526                 -type f -print | xargs rm -f
1527                                                  1527 
1528 # distclean                                      1528 # distclean
1529 #                                                1529 #
1530 PHONY += distclean                               1530 PHONY += distclean
1531                                                  1531 
1532 distclean: mrproper                              1532 distclean: mrproper
1533         @find . $(RCS_FIND_IGNORE) \             1533         @find . $(RCS_FIND_IGNORE) \
1534                 \( -name '*.orig' -o -name '*    1534                 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1535                 -o -name '*.bak' -o -name '#*    1535                 -o -name '*.bak' -o -name '#*#' -o -name '*%' \
1536                 -o -name 'core' -o -name tags    1536                 -o -name 'core' -o -name tags -o -name TAGS -o -name 'cscope*' \
1537                 -o -name GPATH -o -name GRTAG    1537                 -o -name GPATH -o -name GRTAGS -o -name GSYMS -o -name GTAGS \) \
1538                 -type f -print | xargs rm -f     1538                 -type f -print | xargs rm -f
1539                                                  1539 
1540                                                  1540 
1541 # Packaging of the kernel to various formats     1541 # Packaging of the kernel to various formats
1542 # -------------------------------------------    1542 # ---------------------------------------------------------------------------
1543                                                  1543 
1544 %src-pkg: FORCE                                  1544 %src-pkg: FORCE
1545         $(Q)$(MAKE) -f $(srctree)/scripts/Mak    1545         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
1546 %pkg: include/config/kernel.release FORCE        1546 %pkg: include/config/kernel.release FORCE
1547         $(Q)$(MAKE) -f $(srctree)/scripts/Mak    1547         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
1548                                                  1548 
1549 # Brief documentation of the typical targets     1549 # Brief documentation of the typical targets used
1550 # -------------------------------------------    1550 # ---------------------------------------------------------------------------
1551                                                  1551 
1552 boards := $(wildcard $(srctree)/arch/$(SRCARC    1552 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1553 boards := $(sort $(notdir $(boards)))            1553 boards := $(sort $(notdir $(boards)))
1554 board-dirs := $(dir $(wildcard $(srctree)/arc    1554 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1555 board-dirs := $(sort $(notdir $(board-dirs:/=    1555 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1556                                                  1556 
1557 PHONY += help                                    1557 PHONY += help
1558 help:                                            1558 help:
1559         @echo  'Cleaning targets:'               1559         @echo  'Cleaning targets:'
1560         @echo  '  clean           - Remove mo    1560         @echo  '  clean           - Remove most generated files but keep the config and'
1561         @echo  '                    enough bu    1561         @echo  '                    enough build support to build external modules'
1562         @echo  '  mrproper        - Remove al    1562         @echo  '  mrproper        - Remove all generated files + config + various backup files'
1563         @echo  '  distclean       - mrproper     1563         @echo  '  distclean       - mrproper + remove editor backup and patch files'
1564         @echo  ''                                1564         @echo  ''
1565         @$(MAKE) -f $(srctree)/scripts/kconfi    1565         @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1566         @echo  ''                                1566         @echo  ''
1567         @echo  'Other generic targets:'          1567         @echo  'Other generic targets:'
1568         @echo  '  all             - Build all    1568         @echo  '  all             - Build all targets marked with [*]'
1569         @echo  '* vmlinux         - Build the    1569         @echo  '* vmlinux         - Build the bare kernel'
1570         @echo  '* modules         - Build all    1570         @echo  '* modules         - Build all modules'
1571         @echo  '  modules_install - Install a    1571         @echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1572         @echo  '  vdso_install    - Install u    1572         @echo  '  vdso_install    - Install unstripped vdso to INSTALL_MOD_PATH (default: /)'
1573         @echo  '  dir/            - Build all    1573         @echo  '  dir/            - Build all files in dir and below'
1574         @echo  '  dir/file.[ois]  - Build spe    1574         @echo  '  dir/file.[ois]  - Build specified target only'
1575         @echo  '  dir/file.ll     - Build the    1575         @echo  '  dir/file.ll     - Build the LLVM assembly file'
1576         @echo  '                    (requires    1576         @echo  '                    (requires compiler support for LLVM assembly generation)'
1577         @echo  '  dir/file.lst    - Build spe    1577         @echo  '  dir/file.lst    - Build specified mixed source/assembly target only'
1578         @echo  '                    (requires    1578         @echo  '                    (requires a recent binutils and recent build (System.map))'
1579         @echo  '  dir/file.ko     - Build mod    1579         @echo  '  dir/file.ko     - Build module including final link'
1580         @echo  '  modules_prepare - Set up fo    1580         @echo  '  modules_prepare - Set up for building external modules'
1581         @echo  '  tags/TAGS       - Generate     1581         @echo  '  tags/TAGS       - Generate tags file for editors'
1582         @echo  '  cscope          - Generate     1582         @echo  '  cscope          - Generate cscope index'
1583         @echo  '  gtags           - Generate     1583         @echo  '  gtags           - Generate GNU GLOBAL index'
1584         @echo  '  kernelrelease   - Output th    1584         @echo  '  kernelrelease   - Output the release version string (use with make -s)'
1585         @echo  '  kernelversion   - Output th    1585         @echo  '  kernelversion   - Output the version stored in Makefile (use with make -s)'
1586         @echo  '  image_name      - Output th    1586         @echo  '  image_name      - Output the image name (use with make -s)'
1587         @echo  '  headers_install - Install s    1587         @echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1588          echo  '                    (default:    1588          echo  '                    (default: $(INSTALL_HDR_PATH))'; \
1589          echo  ''                                1589          echo  ''
1590         @echo  'Static analysers:'               1590         @echo  'Static analysers:'
1591         @echo  '  checkstack      - Generate     1591         @echo  '  checkstack      - Generate a list of stack hogs and consider all functions'
1592         @echo  '                    with a st    1592         @echo  '                    with a stack size larger than MINSTACKSIZE (default: 100)'
1593         @echo  '  versioncheck    - Sanity ch    1593         @echo  '  versioncheck    - Sanity check on version.h usage'
1594         @echo  '  includecheck    - Check for    1594         @echo  '  includecheck    - Check for duplicate included header files'
1595         @echo  '  export_report   - List the     1595         @echo  '  export_report   - List the usages of all exported symbols'
1596         @echo  '  headerdep       - Detect in    1596         @echo  '  headerdep       - Detect inclusion cycles in headers'
1597         @echo  '  coccicheck      - Check wit    1597         @echo  '  coccicheck      - Check with Coccinelle'
1598         @echo  '  clang-analyzer  - Check wit    1598         @echo  '  clang-analyzer  - Check with clang static analyzer'
1599         @echo  '  clang-tidy      - Check wit    1599         @echo  '  clang-tidy      - Check with clang-tidy'
1600         @echo  ''                                1600         @echo  ''
1601         @echo  'Tools:'                          1601         @echo  'Tools:'
1602         @echo  '  nsdeps          - Generate     1602         @echo  '  nsdeps          - Generate missing symbol namespace dependencies'
1603         @echo  ''                                1603         @echo  ''
1604         @echo  'Kernel selftest:'                1604         @echo  'Kernel selftest:'
1605         @echo  '  kselftest         - Build a    1605         @echo  '  kselftest         - Build and run kernel selftest'
1606         @echo  '                      Build,     1606         @echo  '                      Build, install, and boot kernel before'
1607         @echo  '                      running    1607         @echo  '                      running kselftest on it'
1608         @echo  '                      Run as     1608         @echo  '                      Run as root for full coverage'
1609         @echo  '  kselftest-all     - Build k    1609         @echo  '  kselftest-all     - Build kernel selftest'
1610         @echo  '  kselftest-install - Build a    1610         @echo  '  kselftest-install - Build and install kernel selftest'
1611         @echo  '  kselftest-clean   - Remove     1611         @echo  '  kselftest-clean   - Remove all generated kselftest files'
1612         @echo  '  kselftest-merge   - Merge a    1612         @echo  '  kselftest-merge   - Merge all the config dependencies of'
1613         @echo  '                      kselfte    1613         @echo  '                      kselftest to existing .config.'
1614         @echo  ''                                1614         @echo  ''
1615         @echo  'Rust targets:'                   1615         @echo  'Rust targets:'
1616         @echo  '  rustavailable   - Checks wh    1616         @echo  '  rustavailable   - Checks whether the Rust toolchain is'
1617         @echo  '                    available    1617         @echo  '                    available and, if not, explains why.'
1618         @echo  '  rustfmt         - Reformat     1618         @echo  '  rustfmt         - Reformat all the Rust code in the kernel'
1619         @echo  '  rustfmtcheck    - Checks if    1619         @echo  '  rustfmtcheck    - Checks if all the Rust code in the kernel'
1620         @echo  '                    is format    1620         @echo  '                    is formatted, printing a diff otherwise.'
1621         @echo  '  rustdoc         - Generate     1621         @echo  '  rustdoc         - Generate Rust documentation'
1622         @echo  '                    (requires    1622         @echo  '                    (requires kernel .config)'
1623         @echo  '  rusttest        - Runs the     1623         @echo  '  rusttest        - Runs the Rust tests'
1624         @echo  '                    (requires    1624         @echo  '                    (requires kernel .config; downloads external repos)'
1625         @echo  '  rust-analyzer   - Generate     1625         @echo  '  rust-analyzer   - Generate rust-project.json rust-analyzer support file'
1626         @echo  '                    (requires    1626         @echo  '                    (requires kernel .config)'
1627         @echo  '  dir/file.[os]   - Build spe    1627         @echo  '  dir/file.[os]   - Build specified target only'
1628         @echo  '  dir/file.rsi    - Build mac    1628         @echo  '  dir/file.rsi    - Build macro expanded source, similar to C preprocessing.'
1629         @echo  '                    Run with     1629         @echo  '                    Run with RUSTFMT=n to skip reformatting if needed.'
1630         @echo  '                    The outpu    1630         @echo  '                    The output is not intended to be compilable.'
1631         @echo  '  dir/file.ll     - Build the    1631         @echo  '  dir/file.ll     - Build the LLVM assembly file'
1632         @echo  ''                                1632         @echo  ''
1633         @$(if $(dtstree), \                      1633         @$(if $(dtstree), \
1634                 echo 'Devicetree:'; \            1634                 echo 'Devicetree:'; \
1635                 echo '* dtbs               -     1635                 echo '* dtbs               - Build device tree blobs for enabled boards'; \
1636                 echo '  dtbs_install       -     1636                 echo '  dtbs_install       - Install dtbs to $(INSTALL_DTBS_PATH)'; \
1637                 echo '  dt_binding_check   -     1637                 echo '  dt_binding_check   - Validate device tree binding documents and examples'; \
1638                 echo '  dt_binding_schema  -     1638                 echo '  dt_binding_schema  - Build processed device tree binding schemas'; \
1639                 echo '  dtbs_check         -     1639                 echo '  dtbs_check         - Validate device tree source files';\
1640                 echo '')                         1640                 echo '')
1641                                                  1641 
1642         @echo 'Userspace tools targets:'         1642         @echo 'Userspace tools targets:'
1643         @echo '  use "make tools/help"'          1643         @echo '  use "make tools/help"'
1644         @echo '  or  "cd tools; make help"'      1644         @echo '  or  "cd tools; make help"'
1645         @echo  ''                                1645         @echo  ''
1646         @echo  'Kernel packaging:'               1646         @echo  'Kernel packaging:'
1647         @$(MAKE) -f $(srctree)/scripts/Makefi    1647         @$(MAKE) -f $(srctree)/scripts/Makefile.package help
1648         @echo  ''                                1648         @echo  ''
1649         @echo  'Documentation targets:'          1649         @echo  'Documentation targets:'
1650         @$(MAKE) -f $(srctree)/Documentation/    1650         @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
1651         @echo  ''                                1651         @echo  ''
1652         @echo  'Architecture-specific targets    1652         @echo  'Architecture-specific targets ($(SRCARCH)):'
1653         @$(or $(archhelp),\                      1653         @$(or $(archhelp),\
1654                 echo '  No architecture-speci    1654                 echo '  No architecture-specific help defined for $(SRCARCH)')
1655         @echo  ''                                1655         @echo  ''
1656         @$(if $(boards), \                       1656         @$(if $(boards), \
1657                 $(foreach b, $(boards), \        1657                 $(foreach b, $(boards), \
1658                 printf "  %-27s - Build for %    1658                 printf "  %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1659                 echo '')                         1659                 echo '')
1660         @$(if $(board-dirs), \                   1660         @$(if $(board-dirs), \
1661                 $(foreach b, $(board-dirs), \    1661                 $(foreach b, $(board-dirs), \
1662                 printf "  %-16s - Show %s-spe    1662                 printf "  %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1663                 printf "  %-16s - Show all of    1663                 printf "  %-16s - Show all of the above\\n" help-boards; \
1664                 echo '')                         1664                 echo '')
1665                                                  1665 
1666         @echo  '  make V=n   [targets] 1: ver    1666         @echo  '  make V=n   [targets] 1: verbose build'
1667         @echo  '                       2: giv    1667         @echo  '                       2: give reason for rebuild of target'
1668         @echo  '                       V=1 an    1668         @echo  '                       V=1 and V=2 can be combined with V=12'
1669         @echo  '  make O=dir [targets] Locate    1669         @echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1670         @echo  '  make C=1   [targets] Check     1670         @echo  '  make C=1   [targets] Check re-compiled c source with $$CHECK'
1671         @echo  '                       (spars    1671         @echo  '                       (sparse by default)'
1672         @echo  '  make C=2   [targets] Force     1672         @echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1673         @echo  '  make RECORDMCOUNT_WARN=1 [t    1673         @echo  '  make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1674         @echo  '  make W=n   [targets] Enable    1674         @echo  '  make W=n   [targets] Enable extra build checks, n=1,2,3,c,e where'
1675         @echo  '                1: warnings w    1675         @echo  '                1: warnings which may be relevant and do not occur too often'
1676         @echo  '                2: warnings w    1676         @echo  '                2: warnings which occur quite often but may still be relevant'
1677         @echo  '                3: more obscu    1677         @echo  '                3: more obscure warnings, can most likely be ignored'
1678         @echo  '                c: extra chec    1678         @echo  '                c: extra checks in the configuration stage (Kconfig)'
1679         @echo  '                e: warnings a    1679         @echo  '                e: warnings are being treated as errors'
1680         @echo  '                Multiple leve    1680         @echo  '                Multiple levels can be combined with W=12 or W=123'
1681         @$(if $(dtstree), \                      1681         @$(if $(dtstree), \
1682                 echo '  make CHECK_DTBS=1 [ta    1682                 echo '  make CHECK_DTBS=1 [targets] Check all generated dtb files against schema'; \
1683                 echo '         This can be ap    1683                 echo '         This can be applied both to "dtbs" and to individual "foo.dtb" targets' ; \
1684                 )                                1684                 )
1685         @echo  ''                                1685         @echo  ''
1686         @echo  'Execute "make" or "make all"     1686         @echo  'Execute "make" or "make all" to build all targets marked with [*] '
1687         @echo  'For further info see the ./RE    1687         @echo  'For further info see the ./README file'
1688                                                  1688 
1689                                                  1689 
1690 help-board-dirs := $(addprefix help-,$(board-    1690 help-board-dirs := $(addprefix help-,$(board-dirs))
1691                                                  1691 
1692 help-boards: $(help-board-dirs)                  1692 help-boards: $(help-board-dirs)
1693                                                  1693 
1694 boards-per-dir = $(sort $(notdir $(wildcard $    1694 boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
1695                                                  1695 
1696 $(help-board-dirs): help-%:                      1696 $(help-board-dirs): help-%:
1697         @echo  'Architecture-specific targets    1697         @echo  'Architecture-specific targets ($(SRCARCH) $*):'
1698         @$(if $(boards-per-dir), \               1698         @$(if $(boards-per-dir), \
1699                 $(foreach b, $(boards-per-dir    1699                 $(foreach b, $(boards-per-dir), \
1700                 printf "  %-24s - Build for %    1700                 printf "  %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1701                 echo '')                         1701                 echo '')
1702                                                  1702 
1703                                                  1703 
1704 # Documentation targets                          1704 # Documentation targets
1705 # -------------------------------------------    1705 # ---------------------------------------------------------------------------
1706 DOC_TARGETS := xmldocs latexdocs pdfdocs html    1706 DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
1707                linkcheckdocs dochelp refcheck    1707                linkcheckdocs dochelp refcheckdocs texinfodocs infodocs
1708 PHONY += $(DOC_TARGETS)                          1708 PHONY += $(DOC_TARGETS)
1709 $(DOC_TARGETS):                                  1709 $(DOC_TARGETS):
1710         $(Q)$(MAKE) $(build)=Documentation $@    1710         $(Q)$(MAKE) $(build)=Documentation $@
1711                                                  1711 
1712                                                  1712 
1713 # Rust targets                                   1713 # Rust targets
1714 # -------------------------------------------    1714 # ---------------------------------------------------------------------------
1715                                                  1715 
1716 # "Is Rust available?" target                    1716 # "Is Rust available?" target
1717 PHONY += rustavailable                           1717 PHONY += rustavailable
1718 rustavailable:                                   1718 rustavailable:
1719         +$(Q)$(CONFIG_SHELL) $(srctree)/scrip    1719         +$(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh && echo "Rust is available!"
1720                                                  1720 
1721 # Documentation target                           1721 # Documentation target
1722 #                                                1722 #
1723 # Using the singular to avoid running afoul o    1723 # Using the singular to avoid running afoul of `no-dot-config-targets`.
1724 PHONY += rustdoc                                 1724 PHONY += rustdoc
1725 rustdoc: prepare                                 1725 rustdoc: prepare
1726         $(Q)$(MAKE) $(build)=rust $@             1726         $(Q)$(MAKE) $(build)=rust $@
1727                                                  1727 
1728 # Testing target                                 1728 # Testing target
1729 PHONY += rusttest                                1729 PHONY += rusttest
1730 rusttest: prepare                                1730 rusttest: prepare
1731         $(Q)$(MAKE) $(build)=rust $@             1731         $(Q)$(MAKE) $(build)=rust $@
1732                                                  1732 
1733 # Formatting targets                             1733 # Formatting targets
1734 PHONY += rustfmt rustfmtcheck                    1734 PHONY += rustfmt rustfmtcheck
1735                                                  1735 
1736 # We skip `rust/alloc` since we want to minim    1736 # We skip `rust/alloc` since we want to minimize the diff w.r.t. upstream.
1737 #                                                1737 #
1738 # We match using absolute paths since `find`     1738 # We match using absolute paths since `find` does not resolve them
1739 # when matching, which is a problem when e.g.    1739 # when matching, which is a problem when e.g. `srctree` is `..`.
1740 # We `grep` afterwards in order to remove the    1740 # We `grep` afterwards in order to remove the directory entry itself.
1741 rustfmt:                                         1741 rustfmt:
1742         $(Q)find $(abs_srctree) -type f -name    1742         $(Q)find $(abs_srctree) -type f -name '*.rs' \
1743                 -o -path $(abs_srctree)/rust/    1743                 -o -path $(abs_srctree)/rust/alloc -prune \
1744                 -o -path $(abs_objtree)/rust/    1744                 -o -path $(abs_objtree)/rust/test -prune \
1745                 | grep -Fv $(abs_srctree)/rus    1745                 | grep -Fv $(abs_srctree)/rust/alloc \
1746                 | grep -Fv $(abs_objtree)/rus    1746                 | grep -Fv $(abs_objtree)/rust/test \
1747                 | grep -Fv generated \           1747                 | grep -Fv generated \
1748                 | xargs $(RUSTFMT) $(rustfmt_    1748                 | xargs $(RUSTFMT) $(rustfmt_flags)
1749                                                  1749 
1750 rustfmtcheck: rustfmt_flags = --check            1750 rustfmtcheck: rustfmt_flags = --check
1751 rustfmtcheck: rustfmt                            1751 rustfmtcheck: rustfmt
1752                                                  1752 
1753 # Misc                                           1753 # Misc
1754 # -------------------------------------------    1754 # ---------------------------------------------------------------------------
1755                                                  1755 
1756 PHONY += misc-check                              1756 PHONY += misc-check
1757 misc-check:                                      1757 misc-check:
1758         $(Q)$(srctree)/scripts/misc-check        1758         $(Q)$(srctree)/scripts/misc-check
1759                                                  1759 
1760 all: misc-check                                  1760 all: misc-check
1761                                                  1761 
1762 PHONY += scripts_gdb                             1762 PHONY += scripts_gdb
1763 scripts_gdb: prepare0                            1763 scripts_gdb: prepare0
1764         $(Q)$(MAKE) $(build)=scripts/gdb         1764         $(Q)$(MAKE) $(build)=scripts/gdb
1765         $(Q)ln -fsn $(abspath $(srctree)/scri    1765         $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py)
1766                                                  1766 
1767 ifdef CONFIG_GDB_SCRIPTS                         1767 ifdef CONFIG_GDB_SCRIPTS
1768 all: scripts_gdb                                 1768 all: scripts_gdb
1769 endif                                            1769 endif
1770                                                  1770 
1771 else # KBUILD_EXTMOD                             1771 else # KBUILD_EXTMOD
1772                                                  1772 
1773 filechk_kernel.release = echo $(KERNELRELEASE    1773 filechk_kernel.release = echo $(KERNELRELEASE)
1774                                                  1774 
1775 ###                                              1775 ###
1776 # External module support.                       1776 # External module support.
1777 # When building external modules the kernel u    1777 # When building external modules the kernel used as basis is considered
1778 # read-only, and no consistency checks are ma    1778 # read-only, and no consistency checks are made and the make
1779 # system is not used on the basis kernel. If     1779 # system is not used on the basis kernel. If updates are required
1780 # in the basis kernel ordinary make commands     1780 # in the basis kernel ordinary make commands (without M=...) must be used.
1781                                                  1781 
1782 # We are always building only modules.           1782 # We are always building only modules.
1783 KBUILD_BUILTIN :=                                1783 KBUILD_BUILTIN :=
1784 KBUILD_MODULES := 1                              1784 KBUILD_MODULES := 1
1785                                                  1785 
1786 build-dir := $(KBUILD_EXTMOD)                    1786 build-dir := $(KBUILD_EXTMOD)
1787                                                  1787 
1788 compile_commands.json: $(extmod_prefix)compil    1788 compile_commands.json: $(extmod_prefix)compile_commands.json
1789 PHONY += compile_commands.json                   1789 PHONY += compile_commands.json
1790                                                  1790 
1791 clean-dirs := $(KBUILD_EXTMOD)                   1791 clean-dirs := $(KBUILD_EXTMOD)
1792 clean: private rm-files := $(KBUILD_EXTMOD)/M    1792 clean: private rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps \
1793         $(KBUILD_EXTMOD)/compile_commands.jso    1793         $(KBUILD_EXTMOD)/compile_commands.json
1794                                                  1794 
1795 PHONY += prepare                                 1795 PHONY += prepare
1796 # now expand this into a simple variable to r    1796 # now expand this into a simple variable to reduce the cost of shell evaluations
1797 prepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT    1797 prepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT)
1798 prepare:                                         1798 prepare:
1799         @if [ "$(CC_VERSION_TEXT)" != "$(CONF    1799         @if [ "$(CC_VERSION_TEXT)" != "$(CONFIG_CC_VERSION_TEXT)" ]; then \
1800                 echo >&2 "warning: the compil    1800                 echo >&2 "warning: the compiler differs from the one used to build the kernel"; \
1801                 echo >&2 "  The kernel was bu    1801                 echo >&2 "  The kernel was built by: $(CONFIG_CC_VERSION_TEXT)"; \
1802                 echo >&2 "  You are using:       1802                 echo >&2 "  You are using:           $(CC_VERSION_TEXT)"; \
1803         fi                                       1803         fi
1804                                                  1804 
1805 PHONY += help                                    1805 PHONY += help
1806 help:                                            1806 help:
1807         @echo  '  Building external modules.'    1807         @echo  '  Building external modules.'
1808         @echo  '  Syntax: make -C path/to/ker    1808         @echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
1809         @echo  ''                                1809         @echo  ''
1810         @echo  '  modules         - default t    1810         @echo  '  modules         - default target, build the module(s)'
1811         @echo  '  modules_install - install t    1811         @echo  '  modules_install - install the module'
1812         @echo  '  clean           - remove ge    1812         @echo  '  clean           - remove generated files in module directory only'
1813         @echo  '  rust-analyzer   - generate     1813         @echo  '  rust-analyzer   - generate rust-project.json rust-analyzer support file'
1814         @echo  ''                                1814         @echo  ''
1815                                                  1815 
1816 ifndef CONFIG_MODULES                            1816 ifndef CONFIG_MODULES
1817 modules modules_install: __external_modules_e    1817 modules modules_install: __external_modules_error
1818 __external_modules_error:                        1818 __external_modules_error:
1819         @echo >&2 '***'                          1819         @echo >&2 '***'
1820         @echo >&2 '*** The present kernel dis    1820         @echo >&2 '*** The present kernel disabled CONFIG_MODULES.'
1821         @echo >&2 '*** You cannot build or in    1821         @echo >&2 '*** You cannot build or install external modules.'
1822         @echo >&2 '***'                          1822         @echo >&2 '***'
1823         @false                                   1823         @false
1824 endif                                            1824 endif
1825                                                  1825 
1826 endif # KBUILD_EXTMOD                            1826 endif # KBUILD_EXTMOD
1827                                                  1827 
1828 # -------------------------------------------    1828 # ---------------------------------------------------------------------------
1829 # Modules                                        1829 # Modules
1830                                                  1830 
1831 PHONY += modules modules_install modules_sign    1831 PHONY += modules modules_install modules_sign modules_prepare
1832                                                  1832 
1833 modules_install:                                 1833 modules_install:
1834         $(Q)$(MAKE) -f $(srctree)/scripts/Mak    1834         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst \
1835         sign-only=$(if $(filter modules_insta    1835         sign-only=$(if $(filter modules_install,$(MAKECMDGOALS)),,y)
1836                                                  1836 
1837 ifeq ($(CONFIG_MODULE_SIG),y)                    1837 ifeq ($(CONFIG_MODULE_SIG),y)
1838 # modules_sign is a subset of modules_install    1838 # modules_sign is a subset of modules_install.
1839 # 'make modules_install modules_sign' is equi    1839 # 'make modules_install modules_sign' is equivalent to 'make modules_install'.
1840 modules_sign: modules_install                    1840 modules_sign: modules_install
1841         @:                                       1841         @:
1842 else                                             1842 else
1843 modules_sign:                                    1843 modules_sign:
1844         @echo >&2 '***'                          1844         @echo >&2 '***'
1845         @echo >&2 '*** CONFIG_MODULE_SIG is d    1845         @echo >&2 '*** CONFIG_MODULE_SIG is disabled. You cannot sign modules.'
1846         @echo >&2 '***'                          1846         @echo >&2 '***'
1847         @false                                   1847         @false
1848 endif                                            1848 endif
1849                                                  1849 
1850 ifdef CONFIG_MODULES                             1850 ifdef CONFIG_MODULES
1851                                                  1851 
1852 $(MODORDER): $(build-dir)                        1852 $(MODORDER): $(build-dir)
1853         @:                                       1853         @:
1854                                                  1854 
1855 # KBUILD_MODPOST_NOFINAL can be set to skip t    1855 # KBUILD_MODPOST_NOFINAL can be set to skip the final link of modules.
1856 # This is solely useful to speed up test comp    1856 # This is solely useful to speed up test compiles.
1857 modules: modpost                                 1857 modules: modpost
1858 ifneq ($(KBUILD_MODPOST_NOFINAL),1)              1858 ifneq ($(KBUILD_MODPOST_NOFINAL),1)
1859         $(Q)$(MAKE) -f $(srctree)/scripts/Mak    1859         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modfinal
1860 endif                                            1860 endif
1861                                                  1861 
1862 PHONY += modules_check                           1862 PHONY += modules_check
1863 modules_check: $(MODORDER)                       1863 modules_check: $(MODORDER)
1864         $(Q)$(CONFIG_SHELL) $(srctree)/script    1864         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $<
1865                                                  1865 
1866 else # CONFIG_MODULES                            1866 else # CONFIG_MODULES
1867                                                  1867 
1868 modules:                                         1868 modules:
1869         @:                                       1869         @:
1870                                                  1870 
1871 KBUILD_MODULES :=                                1871 KBUILD_MODULES :=
1872                                                  1872 
1873 endif # CONFIG_MODULES                           1873 endif # CONFIG_MODULES
1874                                                  1874 
1875 PHONY += modpost                                 1875 PHONY += modpost
1876 modpost: $(if $(single-build),, $(if $(KBUILD    1876 modpost: $(if $(single-build),, $(if $(KBUILD_BUILTIN), vmlinux.o)) \
1877          $(if $(KBUILD_MODULES), modules_chec    1877          $(if $(KBUILD_MODULES), modules_check)
1878         $(Q)$(MAKE) -f $(srctree)/scripts/Mak    1878         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1879                                                  1879 
1880 # Single targets                                 1880 # Single targets
1881 # -------------------------------------------    1881 # ---------------------------------------------------------------------------
1882 # To build individual files in subdirectories    1882 # To build individual files in subdirectories, you can do like this:
1883 #                                                1883 #
1884 #   make foo/bar/baz.s                           1884 #   make foo/bar/baz.s
1885 #                                                1885 #
1886 # The supported suffixes for single-target ar    1886 # The supported suffixes for single-target are listed in 'single-targets'
1887 #                                                1887 #
1888 # To build only under specific subdirectories    1888 # To build only under specific subdirectories, you can do like this:
1889 #                                                1889 #
1890 #   make foo/bar/baz/                            1890 #   make foo/bar/baz/
1891                                                  1891 
1892 ifdef single-build                               1892 ifdef single-build
1893                                                  1893 
1894 # .ko is special because modpost is needed       1894 # .ko is special because modpost is needed
1895 single-ko := $(sort $(filter %.ko, $(MAKECMDG    1895 single-ko := $(sort $(filter %.ko, $(MAKECMDGOALS)))
1896 single-no-ko := $(filter-out $(single-ko), $(    1896 single-no-ko := $(filter-out $(single-ko), $(MAKECMDGOALS)) \
1897                 $(foreach x, o mod, $(patsubs    1897                 $(foreach x, o mod, $(patsubst %.ko, %.$x, $(single-ko)))
1898                                                  1898 
1899 $(single-ko): single_modules                     1899 $(single-ko): single_modules
1900         @:                                       1900         @:
1901 $(single-no-ko): $(build-dir)                    1901 $(single-no-ko): $(build-dir)
1902         @:                                       1902         @:
1903                                                  1903 
1904 # Remove MODORDER when done because it is not    1904 # Remove MODORDER when done because it is not the real one.
1905 PHONY += single_modules                          1905 PHONY += single_modules
1906 single_modules: $(single-no-ko) modules_prepa    1906 single_modules: $(single-no-ko) modules_prepare
1907         $(Q){ $(foreach m, $(single-ko), echo    1907         $(Q){ $(foreach m, $(single-ko), echo $(extmod_prefix)$(m:%.ko=%.o);) } > $(MODORDER)
1908         $(Q)$(MAKE) -f $(srctree)/scripts/Mak    1908         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1909 ifneq ($(KBUILD_MODPOST_NOFINAL),1)              1909 ifneq ($(KBUILD_MODPOST_NOFINAL),1)
1910         $(Q)$(MAKE) -f $(srctree)/scripts/Mak    1910         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modfinal
1911 endif                                            1911 endif
1912         $(Q)rm -f $(MODORDER)                    1912         $(Q)rm -f $(MODORDER)
1913                                                  1913 
1914 single-goals := $(addprefix $(build-dir)/, $(    1914 single-goals := $(addprefix $(build-dir)/, $(single-no-ko))
1915                                                  1915 
1916 KBUILD_MODULES := 1                              1916 KBUILD_MODULES := 1
1917                                                  1917 
1918 endif                                            1918 endif
1919                                                  1919 
1920 # Preset locale variables to speed up the bui    1920 # Preset locale variables to speed up the build process. Limit locale
1921 # tweaks to this spot to avoid wrong language    1921 # tweaks to this spot to avoid wrong language settings when running
1922 # make menuconfig etc.                           1922 # make menuconfig etc.
1923 # Error messages still appears in the origina    1923 # Error messages still appears in the original language
1924 PHONY += $(build-dir)                            1924 PHONY += $(build-dir)
1925 $(build-dir): prepare                            1925 $(build-dir): prepare
1926         $(Q)$(MAKE) $(build)=$@ need-builtin=    1926         $(Q)$(MAKE) $(build)=$@ need-builtin=1 need-modorder=1 $(single-goals)
1927                                                  1927 
1928 clean-dirs := $(addprefix _clean_, $(clean-di    1928 clean-dirs := $(addprefix _clean_, $(clean-dirs))
1929 PHONY += $(clean-dirs) clean                     1929 PHONY += $(clean-dirs) clean
1930 $(clean-dirs):                                   1930 $(clean-dirs):
1931         $(Q)$(MAKE) $(clean)=$(patsubst _clea    1931         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1932                                                  1932 
1933 clean: $(clean-dirs)                             1933 clean: $(clean-dirs)
1934         $(call cmd,rmfiles)                      1934         $(call cmd,rmfiles)
1935         @find $(or $(KBUILD_EXTMOD), .) $(RCS    1935         @find $(or $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1936                 \( -name '*.[aios]' -o -name     1936                 \( -name '*.[aios]' -o -name '*.rsi' -o -name '*.ko' -o -name '.*.cmd' \
1937                 -o -name '*.ko.*' \              1937                 -o -name '*.ko.*' \
1938                 -o -name '*.dtb' -o -name '*.    1938                 -o -name '*.dtb' -o -name '*.dtbo' \
1939                 -o -name '*.dtb.S' -o -name '    1939                 -o -name '*.dtb.S' -o -name '*.dtbo.S' \
1940                 -o -name '*.dt.yaml' -o -name    1940                 -o -name '*.dt.yaml' -o -name 'dtbs-list' \
1941                 -o -name '*.dwo' -o -name '*.    1941                 -o -name '*.dwo' -o -name '*.lst' \
1942                 -o -name '*.su' -o -name '*.m    1942                 -o -name '*.su' -o -name '*.mod' \
1943                 -o -name '.*.d' -o -name '.*.    1943                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1944                 -o -name '*.lex.c' -o -name '    1944                 -o -name '*.lex.c' -o -name '*.tab.[ch]' \
1945                 -o -name '*.asn1.[ch]' \         1945                 -o -name '*.asn1.[ch]' \
1946                 -o -name '*.symtypes' -o -nam    1946                 -o -name '*.symtypes' -o -name 'modules.order' \
1947                 -o -name '*.c.[012]*.*' \        1947                 -o -name '*.c.[012]*.*' \
1948                 -o -name '*.ll' \                1948                 -o -name '*.ll' \
1949                 -o -name '*.gcno' \              1949                 -o -name '*.gcno' \
1950                 -o -name '*.*.symversions' \)    1950                 -o -name '*.*.symversions' \) -type f -print \
1951                 -o -name '.tmp_*' -print \       1951                 -o -name '.tmp_*' -print \
1952                 | xargs rm -rf                   1952                 | xargs rm -rf
1953                                                  1953 
1954 # Generate tags for editors                      1954 # Generate tags for editors
1955 # -------------------------------------------    1955 # ---------------------------------------------------------------------------
1956 quiet_cmd_tags = GEN     $@                      1956 quiet_cmd_tags = GEN     $@
1957       cmd_tags = $(BASH) $(srctree)/scripts/t    1957       cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@
1958                                                  1958 
1959 tags TAGS cscope gtags: FORCE                    1959 tags TAGS cscope gtags: FORCE
1960         $(call cmd,tags)                         1960         $(call cmd,tags)
1961                                                  1961 
1962 # Generate rust-project.json (a file that des    1962 # Generate rust-project.json (a file that describes the structure of non-Cargo
1963 # Rust projects) for rust-analyzer (an implem    1963 # Rust projects) for rust-analyzer (an implementation of the Language Server
1964 # Protocol).                                     1964 # Protocol).
1965 PHONY += rust-analyzer                           1965 PHONY += rust-analyzer
1966 rust-analyzer:                                   1966 rust-analyzer:
1967         +$(Q)$(CONFIG_SHELL) $(srctree)/scrip    1967         +$(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh
1968         $(Q)$(MAKE) $(build)=rust $@             1968         $(Q)$(MAKE) $(build)=rust $@
1969                                                  1969 
1970 # Script to generate missing namespace depend    1970 # Script to generate missing namespace dependencies
1971 # -------------------------------------------    1971 # ---------------------------------------------------------------------------
1972                                                  1972 
1973 PHONY += nsdeps                                  1973 PHONY += nsdeps
1974 nsdeps: export KBUILD_NSDEPS=1                   1974 nsdeps: export KBUILD_NSDEPS=1
1975 nsdeps: modules                                  1975 nsdeps: modules
1976         $(Q)$(CONFIG_SHELL) $(srctree)/script    1976         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps
1977                                                  1977 
1978 # Clang Tooling                                  1978 # Clang Tooling
1979 # -------------------------------------------    1979 # ---------------------------------------------------------------------------
1980                                                  1980 
1981 quiet_cmd_gen_compile_commands = GEN     $@      1981 quiet_cmd_gen_compile_commands = GEN     $@
1982       cmd_gen_compile_commands = $(PYTHON3) $    1982       cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs))
1983                                                  1983 
1984 $(extmod_prefix)compile_commands.json: $(srct    1984 $(extmod_prefix)compile_commands.json: $(srctree)/scripts/clang-tools/gen_compile_commands.py \
1985         $(if $(KBUILD_EXTMOD),, vmlinux.a $(K    1985         $(if $(KBUILD_EXTMOD),, vmlinux.a $(KBUILD_VMLINUX_LIBS)) \
1986         $(if $(CONFIG_MODULES), $(MODORDER))     1986         $(if $(CONFIG_MODULES), $(MODORDER)) FORCE
1987         $(call if_changed,gen_compile_command    1987         $(call if_changed,gen_compile_commands)
1988                                                  1988 
1989 targets += $(extmod_prefix)compile_commands.j    1989 targets += $(extmod_prefix)compile_commands.json
1990                                                  1990 
1991 PHONY += clang-tidy clang-analyzer               1991 PHONY += clang-tidy clang-analyzer
1992                                                  1992 
1993 ifdef CONFIG_CC_IS_CLANG                         1993 ifdef CONFIG_CC_IS_CLANG
1994 quiet_cmd_clang_tools = CHECK   $<               1994 quiet_cmd_clang_tools = CHECK   $<
1995       cmd_clang_tools = $(PYTHON3) $(srctree)    1995       cmd_clang_tools = $(PYTHON3) $(srctree)/scripts/clang-tools/run-clang-tools.py $@ $<
1996                                                  1996 
1997 clang-tidy clang-analyzer: $(extmod_prefix)co    1997 clang-tidy clang-analyzer: $(extmod_prefix)compile_commands.json
1998         $(call cmd,clang_tools)                  1998         $(call cmd,clang_tools)
1999 else                                             1999 else
2000 clang-tidy clang-analyzer:                       2000 clang-tidy clang-analyzer:
2001         @echo "$@ requires CC=clang" >&2         2001         @echo "$@ requires CC=clang" >&2
2002         @false                                   2002         @false
2003 endif                                            2003 endif
2004                                                  2004 
2005 # Scripts to check various things for consist    2005 # Scripts to check various things for consistency
2006 # -------------------------------------------    2006 # ---------------------------------------------------------------------------
2007                                                  2007 
2008 PHONY += includecheck versioncheck coccicheck    2008 PHONY += includecheck versioncheck coccicheck export_report
2009                                                  2009 
2010 includecheck:                                    2010 includecheck:
2011         find $(srctree)/* $(RCS_FIND_IGNORE)     2011         find $(srctree)/* $(RCS_FIND_IGNORE) \
2012                 -name '*.[hcS]' -type f -prin    2012                 -name '*.[hcS]' -type f -print | sort \
2013                 | xargs $(PERL) -w $(srctree)    2013                 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
2014                                                  2014 
2015 versioncheck:                                    2015 versioncheck:
2016         find $(srctree)/* $(RCS_FIND_IGNORE)     2016         find $(srctree)/* $(RCS_FIND_IGNORE) \
2017                 -name '*.[hcS]' -type f -prin    2017                 -name '*.[hcS]' -type f -print | sort \
2018                 | xargs $(PERL) -w $(srctree)    2018                 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
2019                                                  2019 
2020 coccicheck:                                      2020 coccicheck:
2021         $(Q)$(BASH) $(srctree)/scripts/$@        2021         $(Q)$(BASH) $(srctree)/scripts/$@
2022                                                  2022 
2023 export_report:                                   2023 export_report:
2024         $(PERL) $(srctree)/scripts/export_rep    2024         $(PERL) $(srctree)/scripts/export_report.pl
2025                                                  2025 
2026 PHONY += checkstack kernelrelease kernelversi    2026 PHONY += checkstack kernelrelease kernelversion image_name
2027                                                  2027 
2028 # UML needs a little special treatment here.     2028 # UML needs a little special treatment here.  It wants to use the host
2029 # toolchain, so needs $(SUBARCH) passed to ch    2029 # toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
2030 # else wants $(ARCH), including people doing     2030 # else wants $(ARCH), including people doing cross-builds, which means
2031 # that $(SUBARCH) doesn't work here.             2031 # that $(SUBARCH) doesn't work here.
2032 ifeq ($(ARCH), um)                               2032 ifeq ($(ARCH), um)
2033 CHECKSTACK_ARCH := $(SUBARCH)                    2033 CHECKSTACK_ARCH := $(SUBARCH)
2034 else                                             2034 else
2035 CHECKSTACK_ARCH := $(ARCH)                       2035 CHECKSTACK_ARCH := $(ARCH)
2036 endif                                            2036 endif
2037 MINSTACKSIZE    ?= 100                           2037 MINSTACKSIZE    ?= 100
2038 checkstack:                                      2038 checkstack:
2039         $(OBJDUMP) -d vmlinux $$(find . -name    2039         $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
2040         $(PERL) $(srctree)/scripts/checkstack    2040         $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH) $(MINSTACKSIZE)
2041                                                  2041 
2042 kernelrelease:                                   2042 kernelrelease:
2043         @$(filechk_kernel.release)               2043         @$(filechk_kernel.release)
2044                                                  2044 
2045 kernelversion:                                   2045 kernelversion:
2046         @echo $(KERNELVERSION)                   2046         @echo $(KERNELVERSION)
2047                                                  2047 
2048 image_name:                                      2048 image_name:
2049         @echo $(KBUILD_IMAGE)                    2049         @echo $(KBUILD_IMAGE)
2050                                                  2050 
2051 PHONY += run-command                             2051 PHONY += run-command
2052 run-command:                                     2052 run-command:
2053         $(Q)$(KBUILD_RUN_COMMAND)                2053         $(Q)$(KBUILD_RUN_COMMAND)
2054                                                  2054 
2055 quiet_cmd_rmfiles = $(if $(wildcard $(rm-file    2055 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
2056       cmd_rmfiles = rm -rf $(rm-files)           2056       cmd_rmfiles = rm -rf $(rm-files)
2057                                                  2057 
2058 # read saved command lines for existing targe    2058 # read saved command lines for existing targets
2059 existing-targets := $(wildcard $(sort $(targe    2059 existing-targets := $(wildcard $(sort $(targets)))
2060                                                  2060 
2061 -include $(foreach f,$(existing-targets),$(di    2061 -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
2062                                                  2062 
2063 endif # config-build                             2063 endif # config-build
2064 endif # mixed-build                              2064 endif # mixed-build
2065 endif # need-sub-make                            2065 endif # need-sub-make
2066                                                  2066 
2067 PHONY += FORCE                                   2067 PHONY += FORCE
2068 FORCE:                                           2068 FORCE:
2069                                                  2069 
2070 # Declare the contents of the PHONY variable     2070 # Declare the contents of the PHONY variable as phony.  We keep that
2071 # information in a variable so we can use it     2071 # information in a variable so we can use it in if_changed and friends.
2072 .PHONY: $(PHONY)                                 2072 .PHONY: $(PHONY)
                                                      

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