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Linux/Documentation/Changes

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Diff markup

Differences between /Documentation/Changes (Version linux-6.12-rc7) and /Documentation/Changes (Version linux-6.10.14)


  1 .. _changes:                                        1 .. _changes:
  2                                                     2 
  3 Minimal requirements to compile the Kernel          3 Minimal requirements to compile the Kernel
  4 ++++++++++++++++++++++++++++++++++++++++++          4 ++++++++++++++++++++++++++++++++++++++++++
  5                                                     5 
  6 Intro                                               6 Intro
  7 =====                                               7 =====
  8                                                     8 
  9 This document is designed to provide a list of      9 This document is designed to provide a list of the minimum levels of
 10 software necessary to run the current kernel v     10 software necessary to run the current kernel version.
 11                                                    11 
 12 This document is originally based on my "Chang     12 This document is originally based on my "Changes" file for 2.0.x kernels
 13 and therefore owes credit to the same people a     13 and therefore owes credit to the same people as that file (Jared Mauch,
 14 Axel Boldt, Alessandro Sigala, and countless o     14 Axel Boldt, Alessandro Sigala, and countless other users all over the
 15 'net).                                             15 'net).
 16                                                    16 
 17 Current Minimal Requirements                       17 Current Minimal Requirements
 18 ****************************                       18 ****************************
 19                                                    19 
 20 Upgrade to at **least** these software revisio     20 Upgrade to at **least** these software revisions before thinking you've
 21 encountered a bug!  If you're unsure what vers     21 encountered a bug!  If you're unsure what version you're currently
 22 running, the suggested command should tell you     22 running, the suggested command should tell you.
 23                                                    23 
 24 Again, keep in mind that this list assumes you     24 Again, keep in mind that this list assumes you are already functionally
 25 running a Linux kernel.  Also, not all tools a     25 running a Linux kernel.  Also, not all tools are necessary on all
 26 systems; obviously, if you don't have any PC C     26 systems; obviously, if you don't have any PC Card hardware, for example,
 27 you probably needn't concern yourself with pcm     27 you probably needn't concern yourself with pcmciautils.
 28                                                    28 
 29 ====================== ===============  ======     29 ====================== ===============  ========================================
 30         Program        Minimal version       C     30         Program        Minimal version       Command to check the version
 31 ====================== ===============  ======     31 ====================== ===============  ========================================
 32 GNU C                  5.1              gcc --     32 GNU C                  5.1              gcc --version
 33 Clang/LLVM (optional)  13.0.1           clang      33 Clang/LLVM (optional)  13.0.1           clang --version
 34 Rust (optional)        1.78.0           rustc      34 Rust (optional)        1.78.0           rustc --version
 35 bindgen (optional)     0.65.1           bindge     35 bindgen (optional)     0.65.1           bindgen --version
 36 GNU make               4.0              make - !!  36 GNU make               3.82             make --version
 37 bash                   4.2              bash -     37 bash                   4.2              bash --version
 38 binutils               2.25             ld -v      38 binutils               2.25             ld -v
 39 flex                   2.5.35           flex -     39 flex                   2.5.35           flex --version
 40 bison                  2.0              bison      40 bison                  2.0              bison --version
 41 pahole                 1.16             pahole     41 pahole                 1.16             pahole --version
 42 util-linux             2.10o            mount      42 util-linux             2.10o            mount --version
 43 kmod                   13               depmod     43 kmod                   13               depmod -V
 44 e2fsprogs              1.41.4           e2fsck     44 e2fsprogs              1.41.4           e2fsck -V
 45 jfsutils               1.1.3            fsck.j     45 jfsutils               1.1.3            fsck.jfs -V
 46 reiserfsprogs          3.6.3            reiser     46 reiserfsprogs          3.6.3            reiserfsck -V
 47 xfsprogs               2.6.0            xfs_db     47 xfsprogs               2.6.0            xfs_db -V
 48 squashfs-tools         4.0              mksqua     48 squashfs-tools         4.0              mksquashfs -version
 49 btrfs-progs            0.18             btrfsc     49 btrfs-progs            0.18             btrfsck
 50 pcmciautils            004              pccard     50 pcmciautils            004              pccardctl -V
 51 quota-tools            3.09             quota      51 quota-tools            3.09             quota -V
 52 PPP                    2.4.0            pppd -     52 PPP                    2.4.0            pppd --version
 53 nfs-utils              1.0.5            showmo     53 nfs-utils              1.0.5            showmount --version
 54 procps                 3.2.0            ps --v     54 procps                 3.2.0            ps --version
 55 udev                   081              udevd      55 udev                   081              udevd --version
 56 grub                   0.93             grub -     56 grub                   0.93             grub --version || grub-install --version
 57 mcelog                 0.6              mcelog     57 mcelog                 0.6              mcelog --version
 58 iptables               1.4.2            iptabl     58 iptables               1.4.2            iptables -V
 59 openssl & libcrypto    1.0.0            openss     59 openssl & libcrypto    1.0.0            openssl version
 60 bc                     1.06.95          bc --v     60 bc                     1.06.95          bc --version
 61 Sphinx\ [#f1]_         2.4.4            sphinx     61 Sphinx\ [#f1]_         2.4.4            sphinx-build --version
 62 cpio                   any              cpio -     62 cpio                   any              cpio --version
 63 GNU tar                1.28             tar --     63 GNU tar                1.28             tar --version
 64 gtags (optional)       6.6.5            gtags      64 gtags (optional)       6.6.5            gtags --version
 65 mkimage (optional)     2017.01          mkimag     65 mkimage (optional)     2017.01          mkimage --version
 66 Python (optional)      3.5.x            python << 
 67 GNU AWK (optional)     5.1.0            gawk - << 
 68 ====================== ===============  ======     66 ====================== ===============  ========================================
 69                                                    67 
 70 .. [#f1] Sphinx is needed only to build the Ke     68 .. [#f1] Sphinx is needed only to build the Kernel documentation
 71                                                    69 
 72 Kernel compilation                                 70 Kernel compilation
 73 ******************                                 71 ******************
 74                                                    72 
 75 GCC                                                73 GCC
 76 ---                                                74 ---
 77                                                    75 
 78 The gcc version requirements may vary dependin     76 The gcc version requirements may vary depending on the type of CPU in your
 79 computer.                                          77 computer.
 80                                                    78 
 81 Clang/LLVM (optional)                              79 Clang/LLVM (optional)
 82 ---------------------                              80 ---------------------
 83                                                    81 
 84 The latest formal release of clang and LLVM ut     82 The latest formal release of clang and LLVM utils (according to
 85 `releases.llvm.org <https://releases.llvm.org>     83 `releases.llvm.org <https://releases.llvm.org>`_) are supported for building
 86 kernels. Older releases aren't guaranteed to w     84 kernels. Older releases aren't guaranteed to work, and we may drop workarounds
 87 from the kernel that were used to support olde     85 from the kernel that were used to support older versions. Please see additional
 88 docs on :ref:`Building Linux with Clang/LLVM <     86 docs on :ref:`Building Linux with Clang/LLVM <kbuild_llvm>`.
 89                                                    87 
 90 Rust (optional)                                    88 Rust (optional)
 91 ---------------                                    89 ---------------
 92                                                    90 
 93 A recent version of the Rust compiler is requi !!  91 A particular version of the Rust toolchain is required. Newer versions may or
                                                   >>  92 may not work because the kernel depends on some unstable Rust features, for
                                                   >>  93 the moment.
                                                   >>  94 
                                                   >>  95 Each Rust toolchain comes with several "components", some of which are required
                                                   >>  96 (like ``rustc``) and some that are optional. The ``rust-src`` component (which
                                                   >>  97 is optional) needs to be installed to build the kernel. Other components are
                                                   >>  98 useful for developing.
 94                                                    99 
 95 Please see Documentation/rust/quick-start.rst     100 Please see Documentation/rust/quick-start.rst for instructions on how to
 96 satisfy the build requirements of Rust support    101 satisfy the build requirements of Rust support. In particular, the ``Makefile``
 97 target ``rustavailable`` is useful to check wh    102 target ``rustavailable`` is useful to check why the Rust toolchain may not
 98 be detected.                                      103 be detected.
 99                                                   104 
100 bindgen (optional)                                105 bindgen (optional)
101 ------------------                                106 ------------------
102                                                   107 
103 ``bindgen`` is used to generate the Rust bindi    108 ``bindgen`` is used to generate the Rust bindings to the C side of the kernel.
104 It depends on ``libclang``.                       109 It depends on ``libclang``.
105                                                   110 
106 Make                                              111 Make
107 ----                                              112 ----
108                                                   113 
109 You will need GNU make 4.0 or later to build t !! 114 You will need GNU make 3.82 or later to build the kernel.
110                                                   115 
111 Bash                                              116 Bash
112 ----                                              117 ----
113                                                   118 
114 Some bash scripts are used for the kernel buil    119 Some bash scripts are used for the kernel build.
115 Bash 4.2 or newer is needed.                      120 Bash 4.2 or newer is needed.
116                                                   121 
117 Binutils                                          122 Binutils
118 --------                                          123 --------
119                                                   124 
120 Binutils 2.25 or newer is needed to build the     125 Binutils 2.25 or newer is needed to build the kernel.
121                                                   126 
122 pkg-config                                        127 pkg-config
123 ----------                                        128 ----------
124                                                   129 
125 The build system, as of 4.18, requires pkg-con    130 The build system, as of 4.18, requires pkg-config to check for installed
126 kconfig tools and to determine flags settings     131 kconfig tools and to determine flags settings for use in
127 'make {g,x}config'.  Previously pkg-config was    132 'make {g,x}config'.  Previously pkg-config was being used but not
128 verified or documented.                           133 verified or documented.
129                                                   134 
130 Flex                                              135 Flex
131 ----                                              136 ----
132                                                   137 
133 Since Linux 4.16, the build system generates l    138 Since Linux 4.16, the build system generates lexical analyzers
134 during build.  This requires flex 2.5.35 or la    139 during build.  This requires flex 2.5.35 or later.
135                                                   140 
136                                                   141 
137 Bison                                             142 Bison
138 -----                                             143 -----
139                                                   144 
140 Since Linux 4.16, the build system generates p    145 Since Linux 4.16, the build system generates parsers
141 during build.  This requires bison 2.0 or late    146 during build.  This requires bison 2.0 or later.
142                                                   147 
143 pahole                                            148 pahole
144 ------                                            149 ------
145                                                   150 
146 Since Linux 5.2, if CONFIG_DEBUG_INFO_BTF is s    151 Since Linux 5.2, if CONFIG_DEBUG_INFO_BTF is selected, the build system
147 generates BTF (BPF Type Format) from DWARF in     152 generates BTF (BPF Type Format) from DWARF in vmlinux, a bit later from kernel
148 modules as well.  This requires pahole v1.16 o    153 modules as well.  This requires pahole v1.16 or later.
149                                                   154 
150 It is found in the 'dwarves' or 'pahole' distr    155 It is found in the 'dwarves' or 'pahole' distro packages or from
151 https://fedorapeople.org/~acme/dwarves/.          156 https://fedorapeople.org/~acme/dwarves/.
152                                                   157 
153 Perl                                              158 Perl
154 ----                                              159 ----
155                                                   160 
156 You will need perl 5 and the following modules    161 You will need perl 5 and the following modules: ``Getopt::Long``,
157 ``Getopt::Std``, ``File::Basename``, and ``Fil    162 ``Getopt::Std``, ``File::Basename``, and ``File::Find`` to build the kernel.
158                                                   163 
159 BC                                                164 BC
160 --                                                165 --
161                                                   166 
162 You will need bc to build kernels 3.10 and hig    167 You will need bc to build kernels 3.10 and higher
163                                                   168 
164                                                   169 
165 OpenSSL                                           170 OpenSSL
166 -------                                           171 -------
167                                                   172 
168 Module signing and external certificate handli    173 Module signing and external certificate handling use the OpenSSL program and
169 crypto library to do key creation and signatur    174 crypto library to do key creation and signature generation.
170                                                   175 
171 You will need openssl to build kernels 3.7 and    176 You will need openssl to build kernels 3.7 and higher if module signing is
172 enabled.  You will also need openssl developme    177 enabled.  You will also need openssl development packages to build kernels 4.3
173 and higher.                                       178 and higher.
174                                                   179 
175 Tar                                               180 Tar
176 ---                                               181 ---
177                                                   182 
178 GNU tar is needed if you want to enable access    183 GNU tar is needed if you want to enable access to the kernel headers via sysfs
179 (CONFIG_IKHEADERS).                               184 (CONFIG_IKHEADERS).
180                                                   185 
181 gtags / GNU GLOBAL (optional)                     186 gtags / GNU GLOBAL (optional)
182 -----------------------------                     187 -----------------------------
183                                                   188 
184 The kernel build requires GNU GLOBAL version 6    189 The kernel build requires GNU GLOBAL version 6.6.5 or later to generate
185 tag files through ``make gtags``.  This is due    190 tag files through ``make gtags``.  This is due to its use of the gtags
186 ``-C (--directory)`` flag.                        191 ``-C (--directory)`` flag.
187                                                   192 
188 mkimage                                           193 mkimage
189 -------                                           194 -------
190                                                   195 
191 This tool is used when building a Flat Image T    196 This tool is used when building a Flat Image Tree (FIT), commonly used on ARM
192 platforms. The tool is available via the ``u-b    197 platforms. The tool is available via the ``u-boot-tools`` package or can be
193 built from the U-Boot source code. See the ins    198 built from the U-Boot source code. See the instructions at
194 https://docs.u-boot.org/en/latest/build/tools.    199 https://docs.u-boot.org/en/latest/build/tools.html#building-tools-for-linux
195                                                << 
196 GNU AWK                                        << 
197 -------                                        << 
198                                                << 
199 GNU AWK is needed if you want kernel builds to << 
200 builtin modules (CONFIG_BUILTIN_MODULE_RANGES) << 
201                                                   200 
202 System utilities                                  201 System utilities
203 ****************                                  202 ****************
204                                                   203 
205 Architectural changes                             204 Architectural changes
206 ---------------------                             205 ---------------------
207                                                   206 
208 DevFS has been obsoleted in favour of udev        207 DevFS has been obsoleted in favour of udev
209 (https://www.kernel.org/pub/linux/utils/kernel    208 (https://www.kernel.org/pub/linux/utils/kernel/hotplug/)
210                                                   209 
211 32-bit UID support is now in place.  Have fun!    210 32-bit UID support is now in place.  Have fun!
212                                                   211 
213 Linux documentation for functions is transitio    212 Linux documentation for functions is transitioning to inline
214 documentation via specially-formatted comments    213 documentation via specially-formatted comments near their
215 definitions in the source.  These comments can    214 definitions in the source.  These comments can be combined with ReST
216 files the Documentation/ directory to make enr    215 files the Documentation/ directory to make enriched documentation, which can
217 then be converted to PostScript, HTML, LaTex,     216 then be converted to PostScript, HTML, LaTex, ePUB and PDF files.
218 In order to convert from ReST format to a form    217 In order to convert from ReST format to a format of your choice, you'll need
219 Sphinx.                                           218 Sphinx.
220                                                   219 
221 Util-linux                                        220 Util-linux
222 ----------                                        221 ----------
223                                                   222 
224 New versions of util-linux provide ``fdisk`` s    223 New versions of util-linux provide ``fdisk`` support for larger disks,
225 support new options to mount, recognize more s    224 support new options to mount, recognize more supported partition
226 types, and similar goodies.                       225 types, and similar goodies.
227 You'll probably want to upgrade.                  226 You'll probably want to upgrade.
228                                                   227 
229 Ksymoops                                          228 Ksymoops
230 --------                                          229 --------
231                                                   230 
232 If the unthinkable happens and your kernel oop    231 If the unthinkable happens and your kernel oopses, you may need the
233 ksymoops tool to decode it, but in most cases     232 ksymoops tool to decode it, but in most cases you don't.
234 It is generally preferred to build the kernel     233 It is generally preferred to build the kernel with ``CONFIG_KALLSYMS`` so
235 that it produces readable dumps that can be us    234 that it produces readable dumps that can be used as-is (this also
236 produces better output than ksymoops).  If for    235 produces better output than ksymoops).  If for some reason your kernel
237 is not build with ``CONFIG_KALLSYMS`` and you     236 is not build with ``CONFIG_KALLSYMS`` and you have no way to rebuild and
238 reproduce the Oops with that option, then you     237 reproduce the Oops with that option, then you can still decode that Oops
239 with ksymoops.                                    238 with ksymoops.
240                                                   239 
241 Mkinitrd                                          240 Mkinitrd
242 --------                                          241 --------
243                                                   242 
244 These changes to the ``/lib/modules`` file tre    243 These changes to the ``/lib/modules`` file tree layout also require that
245 mkinitrd be upgraded.                             244 mkinitrd be upgraded.
246                                                   245 
247 E2fsprogs                                         246 E2fsprogs
248 ---------                                         247 ---------
249                                                   248 
250 The latest version of ``e2fsprogs`` fixes seve    249 The latest version of ``e2fsprogs`` fixes several bugs in fsck and
251 debugfs.  Obviously, it's a good idea to upgra    250 debugfs.  Obviously, it's a good idea to upgrade.
252                                                   251 
253 JFSutils                                          252 JFSutils
254 --------                                          253 --------
255                                                   254 
256 The ``jfsutils`` package contains the utilitie    255 The ``jfsutils`` package contains the utilities for the file system.
257 The following utilities are available:            256 The following utilities are available:
258                                                   257 
259 - ``fsck.jfs`` - initiate replay of the transa    258 - ``fsck.jfs`` - initiate replay of the transaction log, and check
260   and repair a JFS formatted partition.           259   and repair a JFS formatted partition.
261                                                   260 
262 - ``mkfs.jfs`` - create a JFS formatted partit    261 - ``mkfs.jfs`` - create a JFS formatted partition.
263                                                   262 
264 - other file system utilities are also availab    263 - other file system utilities are also available in this package.
265                                                   264 
266 Reiserfsprogs                                     265 Reiserfsprogs
267 -------------                                     266 -------------
268                                                   267 
269 The reiserfsprogs package should be used for r    268 The reiserfsprogs package should be used for reiserfs-3.6.x
270 (Linux kernels 2.4.x). It is a combined packag    269 (Linux kernels 2.4.x). It is a combined package and contains working
271 versions of ``mkreiserfs``, ``resize_reiserfs`    270 versions of ``mkreiserfs``, ``resize_reiserfs``, ``debugreiserfs`` and
272 ``reiserfsck``. These utils work on both i386     271 ``reiserfsck``. These utils work on both i386 and alpha platforms.
273                                                   272 
274 Xfsprogs                                          273 Xfsprogs
275 --------                                          274 --------
276                                                   275 
277 The latest version of ``xfsprogs`` contains ``    276 The latest version of ``xfsprogs`` contains ``mkfs.xfs``, ``xfs_db``, and the
278 ``xfs_repair`` utilities, among others, for th    277 ``xfs_repair`` utilities, among others, for the XFS filesystem.  It is
279 architecture independent and any version from     278 architecture independent and any version from 2.0.0 onward should
280 work correctly with this version of the XFS ke    279 work correctly with this version of the XFS kernel code (2.6.0 or
281 later is recommended, due to some significant     280 later is recommended, due to some significant improvements).
282                                                   281 
283 PCMCIAutils                                       282 PCMCIAutils
284 -----------                                       283 -----------
285                                                   284 
286 PCMCIAutils replaces ``pcmcia-cs``. It properl    285 PCMCIAutils replaces ``pcmcia-cs``. It properly sets up
287 PCMCIA sockets at system startup and loads the    286 PCMCIA sockets at system startup and loads the appropriate modules
288 for 16-bit PCMCIA devices if the kernel is mod    287 for 16-bit PCMCIA devices if the kernel is modularized and the hotplug
289 subsystem is used.                                288 subsystem is used.
290                                                   289 
291 Quota-tools                                       290 Quota-tools
292 -----------                                       291 -----------
293                                                   292 
294 Support for 32 bit uid's and gid's is required    293 Support for 32 bit uid's and gid's is required if you want to use
295 the newer version 2 quota format.  Quota-tools    294 the newer version 2 quota format.  Quota-tools version 3.07 and
296 newer has this support.  Use the recommended v    295 newer has this support.  Use the recommended version or newer
297 from the table above.                             296 from the table above.
298                                                   297 
299 Intel IA32 microcode                              298 Intel IA32 microcode
300 --------------------                              299 --------------------
301                                                   300 
302 A driver has been added to allow updating of I    301 A driver has been added to allow updating of Intel IA32 microcode,
303 accessible as a normal (misc) character device    302 accessible as a normal (misc) character device.  If you are not using
304 udev you may need to::                            303 udev you may need to::
305                                                   304 
306   mkdir /dev/cpu                                  305   mkdir /dev/cpu
307   mknod /dev/cpu/microcode c 10 184               306   mknod /dev/cpu/microcode c 10 184
308   chmod 0644 /dev/cpu/microcode                   307   chmod 0644 /dev/cpu/microcode
309                                                   308 
310 as root before you can use this.  You'll proba    309 as root before you can use this.  You'll probably also want to
311 get the user-space microcode_ctl utility to us    310 get the user-space microcode_ctl utility to use with this.
312                                                   311 
313 udev                                              312 udev
314 ----                                              313 ----
315                                                   314 
316 ``udev`` is a userspace application for popula    315 ``udev`` is a userspace application for populating ``/dev`` dynamically with
317 only entries for devices actually present. ``u    316 only entries for devices actually present. ``udev`` replaces the basic
318 functionality of devfs, while allowing persist    317 functionality of devfs, while allowing persistent device naming for
319 devices.                                          318 devices.
320                                                   319 
321 FUSE                                              320 FUSE
322 ----                                              321 ----
323                                                   322 
324 Needs libfuse 2.4.0 or later.  Absolute minimu    323 Needs libfuse 2.4.0 or later.  Absolute minimum is 2.3.0 but mount
325 options ``direct_io`` and ``kernel_cache`` won    324 options ``direct_io`` and ``kernel_cache`` won't work.
326                                                   325 
327 Networking                                        326 Networking
328 **********                                        327 **********
329                                                   328 
330 General changes                                   329 General changes
331 ---------------                                   330 ---------------
332                                                   331 
333 If you have advanced network configuration nee    332 If you have advanced network configuration needs, you should probably
334 consider using the network tools from ip-route    333 consider using the network tools from ip-route2.
335                                                   334 
336 Packet Filter / NAT                               335 Packet Filter / NAT
337 -------------------                               336 -------------------
338 The packet filtering and NAT code uses the sam    337 The packet filtering and NAT code uses the same tools like the previous 2.4.x
339 kernel series (iptables).  It still includes b    338 kernel series (iptables).  It still includes backwards-compatibility modules
340 for 2.2.x-style ipchains and 2.0.x-style ipfwa    339 for 2.2.x-style ipchains and 2.0.x-style ipfwadm.
341                                                   340 
342 PPP                                               341 PPP
343 ---                                               342 ---
344                                                   343 
345 The PPP driver has been restructured to suppor    344 The PPP driver has been restructured to support multilink and to
346 enable it to operate over diverse media layers    345 enable it to operate over diverse media layers.  If you use PPP,
347 upgrade pppd to at least 2.4.0.                   346 upgrade pppd to at least 2.4.0.
348                                                   347 
349 If you are not using udev, you must have the d    348 If you are not using udev, you must have the device file /dev/ppp
350 which can be made by::                            349 which can be made by::
351                                                   350 
352   mknod /dev/ppp c 108 0                          351   mknod /dev/ppp c 108 0
353                                                   352 
354 as root.                                          353 as root.
355                                                   354 
356 NFS-utils                                         355 NFS-utils
357 ---------                                         356 ---------
358                                                   357 
359 In ancient (2.4 and earlier) kernels, the nfs     358 In ancient (2.4 and earlier) kernels, the nfs server needed to know
360 about any client that expected to be able to a    359 about any client that expected to be able to access files via NFS.  This
361 information would be given to the kernel by ``    360 information would be given to the kernel by ``mountd`` when the client
362 mounted the filesystem, or by ``exportfs`` at     361 mounted the filesystem, or by ``exportfs`` at system startup.  exportfs
363 would take information about active clients fr    362 would take information about active clients from ``/var/lib/nfs/rmtab``.
364                                                   363 
365 This approach is quite fragile as it depends o    364 This approach is quite fragile as it depends on rmtab being correct
366 which is not always easy, particularly when tr    365 which is not always easy, particularly when trying to implement
367 fail-over.  Even when the system is working we    366 fail-over.  Even when the system is working well, ``rmtab`` suffers from
368 getting lots of old entries that never get rem    367 getting lots of old entries that never get removed.
369                                                   368 
370 With modern kernels we have the option of havi    369 With modern kernels we have the option of having the kernel tell mountd
371 when it gets a request from an unknown host, a    370 when it gets a request from an unknown host, and mountd can give
372 appropriate export information to the kernel.     371 appropriate export information to the kernel.  This removes the
373 dependency on ``rmtab`` and means that the ker    372 dependency on ``rmtab`` and means that the kernel only needs to know about
374 currently active clients.                         373 currently active clients.
375                                                   374 
376 To enable this new functionality, you need to:    375 To enable this new functionality, you need to::
377                                                   376 
378   mount -t nfsd nfsd /proc/fs/nfsd                377   mount -t nfsd nfsd /proc/fs/nfsd
379                                                   378 
380 before running exportfs or mountd.  It is reco    379 before running exportfs or mountd.  It is recommended that all NFS
381 services be protected from the internet-at-lar    380 services be protected from the internet-at-large by a firewall where
382 that is possible.                                 381 that is possible.
383                                                   382 
384 mcelog                                            383 mcelog
385 ------                                            384 ------
386                                                   385 
387 On x86 kernels the mcelog utility is needed to    386 On x86 kernels the mcelog utility is needed to process and log machine check
388 events when ``CONFIG_X86_MCE`` is enabled. Mac    387 events when ``CONFIG_X86_MCE`` is enabled. Machine check events are errors
389 reported by the CPU. Processing them is strong    388 reported by the CPU. Processing them is strongly encouraged.
390                                                   389 
391 Kernel documentation                              390 Kernel documentation
392 ********************                              391 ********************
393                                                   392 
394 Sphinx                                            393 Sphinx
395 ------                                            394 ------
396                                                   395 
397 Please see :ref:`sphinx_install` in :ref:`Docu    396 Please see :ref:`sphinx_install` in :ref:`Documentation/doc-guide/sphinx.rst <sphinxdoc>`
398 for details about Sphinx requirements.            397 for details about Sphinx requirements.
399                                                   398 
400 rustdoc                                           399 rustdoc
401 -------                                           400 -------
402                                                   401 
403 ``rustdoc`` is used to generate the documentat    402 ``rustdoc`` is used to generate the documentation for Rust code. Please see
404 Documentation/rust/general-information.rst for    403 Documentation/rust/general-information.rst for more information.
405                                                   404 
406 Getting updated software                          405 Getting updated software
407 ========================                          406 ========================
408                                                   407 
409 Kernel compilation                                408 Kernel compilation
410 ******************                                409 ******************
411                                                   410 
412 gcc                                               411 gcc
413 ---                                               412 ---
414                                                   413 
415 - <ftp://ftp.gnu.org/gnu/gcc/>                    414 - <ftp://ftp.gnu.org/gnu/gcc/>
416                                                   415 
417 Clang/LLVM                                        416 Clang/LLVM
418 ----------                                        417 ----------
419                                                   418 
420 - :ref:`Getting LLVM <getting_llvm>`.             419 - :ref:`Getting LLVM <getting_llvm>`.
421                                                   420 
422 Rust                                              421 Rust
423 ----                                              422 ----
424                                                   423 
425 - Documentation/rust/quick-start.rst.             424 - Documentation/rust/quick-start.rst.
426                                                   425 
427 bindgen                                           426 bindgen
428 -------                                           427 -------
429                                                   428 
430 - Documentation/rust/quick-start.rst.             429 - Documentation/rust/quick-start.rst.
431                                                   430 
432 Make                                              431 Make
433 ----                                              432 ----
434                                                   433 
435 - <ftp://ftp.gnu.org/gnu/make/>                   434 - <ftp://ftp.gnu.org/gnu/make/>
436                                                   435 
437 Bash                                              436 Bash
438 ----                                              437 ----
439                                                   438 
440 - <ftp://ftp.gnu.org/gnu/bash/>                   439 - <ftp://ftp.gnu.org/gnu/bash/>
441                                                   440 
442 Binutils                                          441 Binutils
443 --------                                          442 --------
444                                                   443 
445 - <https://www.kernel.org/pub/linux/devel/binu    444 - <https://www.kernel.org/pub/linux/devel/binutils/>
446                                                   445 
447 Flex                                              446 Flex
448 ----                                              447 ----
449                                                   448 
450 - <https://github.com/westes/flex/releases>       449 - <https://github.com/westes/flex/releases>
451                                                   450 
452 Bison                                             451 Bison
453 -----                                             452 -----
454                                                   453 
455 - <ftp://ftp.gnu.org/gnu/bison/>                  454 - <ftp://ftp.gnu.org/gnu/bison/>
456                                                   455 
457 OpenSSL                                           456 OpenSSL
458 -------                                           457 -------
459                                                   458 
460 - <https://www.openssl.org/>                      459 - <https://www.openssl.org/>
461                                                   460 
462 System utilities                                  461 System utilities
463 ****************                                  462 ****************
464                                                   463 
465 Util-linux                                        464 Util-linux
466 ----------                                        465 ----------
467                                                   466 
468 - <https://www.kernel.org/pub/linux/utils/util    467 - <https://www.kernel.org/pub/linux/utils/util-linux/>
469                                                   468 
470 Kmod                                              469 Kmod
471 ----                                              470 ----
472                                                   471 
473 - <https://www.kernel.org/pub/linux/utils/kern    472 - <https://www.kernel.org/pub/linux/utils/kernel/kmod/>
474 - <https://git.kernel.org/pub/scm/utils/kernel    473 - <https://git.kernel.org/pub/scm/utils/kernel/kmod/kmod.git>
475                                                   474 
476 Ksymoops                                          475 Ksymoops
477 --------                                          476 --------
478                                                   477 
479 - <https://www.kernel.org/pub/linux/utils/kern    478 - <https://www.kernel.org/pub/linux/utils/kernel/ksymoops/v2.4/>
480                                                   479 
481 Mkinitrd                                          480 Mkinitrd
482 --------                                          481 --------
483                                                   482 
484 - <https://code.launchpad.net/initrd-tools/mai    483 - <https://code.launchpad.net/initrd-tools/main>
485                                                   484 
486 E2fsprogs                                         485 E2fsprogs
487 ---------                                         486 ---------
488                                                   487 
489 - <https://www.kernel.org/pub/linux/kernel/peo    488 - <https://www.kernel.org/pub/linux/kernel/people/tytso/e2fsprogs/>
490 - <https://git.kernel.org/pub/scm/fs/ext2/e2fs    489 - <https://git.kernel.org/pub/scm/fs/ext2/e2fsprogs.git/>
491                                                   490 
492 JFSutils                                          491 JFSutils
493 --------                                          492 --------
494                                                   493 
495 - <https://jfs.sourceforge.net/>                  494 - <https://jfs.sourceforge.net/>
496                                                   495 
497 Reiserfsprogs                                     496 Reiserfsprogs
498 -------------                                     497 -------------
499                                                   498 
500 - <https://git.kernel.org/pub/scm/linux/kernel    499 - <https://git.kernel.org/pub/scm/linux/kernel/git/jeffm/reiserfsprogs.git/>
501                                                   500 
502 Xfsprogs                                          501 Xfsprogs
503 --------                                          502 --------
504                                                   503 
505 - <https://git.kernel.org/pub/scm/fs/xfs/xfspr    504 - <https://git.kernel.org/pub/scm/fs/xfs/xfsprogs-dev.git>
506 - <https://www.kernel.org/pub/linux/utils/fs/x    505 - <https://www.kernel.org/pub/linux/utils/fs/xfs/xfsprogs/>
507                                                   506 
508 Pcmciautils                                       507 Pcmciautils
509 -----------                                       508 -----------
510                                                   509 
511 - <https://www.kernel.org/pub/linux/utils/kern    510 - <https://www.kernel.org/pub/linux/utils/kernel/pcmcia/>
512                                                   511 
513 Quota-tools                                       512 Quota-tools
514 -----------                                       513 -----------
515                                                   514 
516 - <https://sourceforge.net/projects/linuxquota    515 - <https://sourceforge.net/projects/linuxquota/>
517                                                   516 
518                                                   517 
519 Intel P6 microcode                                518 Intel P6 microcode
520 ------------------                                519 ------------------
521                                                   520 
522 - <https://downloadcenter.intel.com/>             521 - <https://downloadcenter.intel.com/>
523                                                   522 
524 udev                                              523 udev
525 ----                                              524 ----
526                                                   525 
527 - <https://www.freedesktop.org/software/system    526 - <https://www.freedesktop.org/software/systemd/man/udev.html>
528                                                   527 
529 FUSE                                              528 FUSE
530 ----                                              529 ----
531                                                   530 
532 - <https://github.com/libfuse/libfuse/releases    531 - <https://github.com/libfuse/libfuse/releases>
533                                                   532 
534 mcelog                                            533 mcelog
535 ------                                            534 ------
536                                                   535 
537 - <https://www.mcelog.org/>                       536 - <https://www.mcelog.org/>
538                                                   537 
539 cpio                                              538 cpio
540 ----                                              539 ----
541                                                   540 
542 - <https://www.gnu.org/software/cpio/>            541 - <https://www.gnu.org/software/cpio/>
543                                                   542 
544 Networking                                        543 Networking
545 **********                                        544 **********
546                                                   545 
547 PPP                                               546 PPP
548 ---                                               547 ---
549                                                   548 
550 - <https://download.samba.org/pub/ppp/>           549 - <https://download.samba.org/pub/ppp/>
551 - <https://git.ozlabs.org/?p=ppp.git>             550 - <https://git.ozlabs.org/?p=ppp.git>
552 - <https://github.com/paulusmack/ppp/>            551 - <https://github.com/paulusmack/ppp/>
553                                                   552 
554 NFS-utils                                         553 NFS-utils
555 ---------                                         554 ---------
556                                                   555 
557 - <https://sourceforge.net/project/showfiles.p    556 - <https://sourceforge.net/project/showfiles.php?group_id=14>
558 - <https://nfs.sourceforge.net/>                  557 - <https://nfs.sourceforge.net/>
559                                                   558 
560 Iptables                                          559 Iptables
561 --------                                          560 --------
562                                                   561 
563 - <https://netfilter.org/projects/iptables/ind    562 - <https://netfilter.org/projects/iptables/index.html>
564                                                   563 
565 Ip-route2                                         564 Ip-route2
566 ---------                                         565 ---------
567                                                   566 
568 - <https://www.kernel.org/pub/linux/utils/net/    567 - <https://www.kernel.org/pub/linux/utils/net/iproute2/>
569                                                   568 
570 OProfile                                          569 OProfile
571 --------                                          570 --------
572                                                   571 
573 - <https://oprofile.sf.net/download/>             572 - <https://oprofile.sf.net/download/>
574                                                   573 
575 Kernel documentation                              574 Kernel documentation
576 ********************                              575 ********************
577                                                   576 
578 Sphinx                                            577 Sphinx
579 ------                                            578 ------
580                                                   579 
581 - <https://www.sphinx-doc.org/>                   580 - <https://www.sphinx-doc.org/>
                                                      

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