Commit Graph

7131 Commits

Author SHA1 Message Date
Masahiro Yamada
26ef40de5c kbuild: move .vmlinux.objs rule to Makefile.modpost
.vmlinux.objs is used by modpost, so scripts/Makefile.modpost is
a better place to generate it.

It is used only when CONFIG_MODVERSIONS=y. It should be guarded
by "ifdef CONFIG_MODVERSIONS".

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
2022-09-29 04:42:00 +09:00
Masahiro Yamada
5750121ae7 kbuild: list sub-directories in ./Kbuild
Use the ordinary obj-y syntax to list subdirectories.

Note1:
Previously, the link order of lib-y depended on CONFIG_MODULES; lib-y
was linked before drivers-y when CONFIG_MODULES=y, otherwise after
drivers-y. This was a bug of commit 7273ad2b08 ("kbuild: link lib-y
objects to vmlinux forcibly when CONFIG_MODULES=y"), but it was not a
big deal after all. Now, all objects listed in lib-y are linked last,
irrespective of CONFIG_MODULES.

Note2:
Finally, the single target build in arch/*/lib/ works correctly. There was
a bug report about this. [1]

  $ make ARCH=arm arch/arm/lib/findbit.o
    CALL    scripts/checksyscalls.sh
    AS      arch/arm/lib/findbit.o

[1]: https://lore.kernel.org/linux-kbuild/YvUQOwL6lD4%2F5%2FU6@shell.armlinux.org.uk/

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
2022-09-29 04:41:31 +09:00
Nick Desaulniers
88b61e3bff Makefile.compiler: replace cc-ifversion with compiler-specific macros
cc-ifversion is GCC specific. Replace it with compiler specific
variants. Update the users of cc-ifversion to use these new macros.

Link: https://github.com/ClangBuiltLinux/linux/issues/350
Link: https://lore.kernel.org/llvm/CAGG=3QWSAUakO42kubrCap8fp-gm1ERJJAYXTnP1iHk_wrH=BQ@mail.gmail.com/
Suggested-by: Bill Wendling <morbo@google.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2022-09-29 04:40:16 +09:00
Janis Schoetterl-Glausch
2e07005f48 kbuild: rpm-pkg: fix breakage when V=1 is used
Doing make V=1 binrpm-pkg results in:

 Executing(%install): /bin/sh -e /var/tmp/rpm-tmp.EgV6qJ
 + umask 022
 + cd .
 + /bin/rm -rf /home/scgl/rpmbuild/BUILDROOT/kernel-6.0.0_rc5+-1.s390x
 + /bin/mkdir -p /home/scgl/rpmbuild/BUILDROOT
 + /bin/mkdir /home/scgl/rpmbuild/BUILDROOT/kernel-6.0.0_rc5+-1.s390x
 + mkdir -p /home/scgl/rpmbuild/BUILDROOT/kernel-6.0.0_rc5+-1.s390x/boot
 + make -f ./Makefile image_name
 + cp test -e include/generated/autoconf.h -a -e include/config/auto.conf || ( \ echo >&2; \ echo >&2 " ERROR: Kernel configuration is invalid."; \ echo >&2 " include/generated/autoconf.h or include/config/auto.conf are missing.";\ echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ echo >&2 ; \ /bin/false) arch/s390/boot/bzImage /home/scgl/rpmbuild/BUILDROOT/kernel-6.0.0_rc5+-1.s390x/boot/vmlinuz-6.0.0-rc5+
 cp: invalid option -- 'e'
 Try 'cp --help' for more information.
 error: Bad exit status from /var/tmp/rpm-tmp.EgV6qJ (%install)

Because the make call to get the image name is verbose and prints
additional information.

Fixes: 993bdde945 ("kbuild: add image_name to no-sync-config-targets")
Signed-off-by: Janis Schoetterl-Glausch <scgl@linux.ibm.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2022-09-29 04:40:16 +09:00
Zeng Heng
a8d5692659 scripts: remove unused argument 'type'
Remove unused function argument, and there is
no logic changes.

Signed-off-by: Zeng Heng <zengheng4@huawei.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2022-09-29 04:40:16 +09:00
Zeng Heng
efc8338e3a Kconfig: remove sym_set_choice_value
sym_set_choice_value could be removed and directly call
sym_set_tristate_value instead.

Signed-off-by: Zeng Heng <zengheng4@huawei.com>
Suggested-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2022-09-29 04:40:15 +09:00
Masahiro Yamada
9ec6ab6ee5 kbuild: use objtool-args-y to clean up objtool arguments
Based on Linus' patch. Refactor scripts/Makefile.vmlinux_o as well.

Link: https://lore.kernel.org/lkml/CAHk-=wgjTMQgiKzBZTmb=uWGDEQxDdyF1+qxBkODYciuNsmwnw@mail.gmail.com/
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
2022-09-29 04:40:15 +09:00
Masahiro Yamada
cc306abd19 kbuild: fix and refactor single target build
The single target build has a subtle bug for the combination for
an individual file and a subdirectory.

[1] 'make kernel/fork.i' builds only kernel/fork.i

  $ make kernel/fork.i
    CALL    scripts/checksyscalls.sh
    DESCEND objtool
    CPP     kernel/fork.i

[2] 'make kernel/' builds only under the kernel/ directory.

  $ make kernel/
    CALL    scripts/checksyscalls.sh
    DESCEND objtool
    CC      kernel/fork.o
    CC      kernel/exec_domain.o
       [snip]
    CC      kernel/rseq.o
    AR      kernel/built-in.a

But, if you try to do [1] and [2] in a single command, you will get
only [1] with a weird log:

  $ make kernel/fork.i kernel/
    CALL    scripts/checksyscalls.sh
    DESCEND objtool
    CPP     kernel/fork.i
  make[2]: Nothing to be done for 'kernel/'.

With 'make kernel/fork.i kernel/', you should get both [1] and [2].

Rewrite the single target build.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2022-09-29 04:40:15 +09:00
Owen Rafferty
033a52d033 kbuild: rewrite check-local-export in sh/awk
Remove the bash build dependency for those who otherwise do not
have it installed. This also provides a significant speedup:

$ make defconfig
$ make yes2modconfig

...

$ find  .  -name "*.o" | grep -v vmlinux | wc
     3169      3169     89615
$ export NM=nm
$ time sh -c 'find . -name "*.o" | grep -v vmlinux | xargs -n1
./scripts/check-local-export'

Without patch:
    0m15.90s real     0m12.17s user     0m05.28s system

With patch:
dash + nawk
    0m02.16s real     0m02.92s user     0m00.34s system

dash + busybox awk
    0m02.36s real     0m03.36s user     0m00.34s system

dash + gawk
    0m02.07s real     0m03.26s user     0m00.32s system

bash + gawk
    0m03.55s real     0m05.00s user     0m00.54s system

Signed-off-by: Owen Rafferty <owen@owenrafferty.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2022-09-29 04:40:15 +09:00
Masahiro Yamada
a6c26e38aa Revert "kbuild: Make scripts/compile.h when sh != bash"
This reverts commit [1] in the pre-git era.

I do not know what problem happened in the script when sh != bash
because there is no commit message.

Now that this script is much simpler than it used to be, let's revert
it, and let' see. (If this turns out to be problematic, fix the code
with proper commit description.)

[1]: https://git.kernel.org/pub/scm/linux/kernel/git/history/history.git/commit/?id=11acbbbb8a50f4de7dbe4bc1b5acc440dfe81810

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2022-09-29 04:40:15 +09:00
Masahiro Yamada
c7b594f53e scripts/mkcompile_h: move LC_ALL=C to '$LD -v'
Minimize the scope of LC_ALL=C like before commit 87c94bfb8a ("kbuild:
override build timestamp & version").

Give LC_ALL=C to '$LD -v' to get the consistent version output, as commit
bcbcf50f52 ("kbuild: fix ld-version.sh to not be affected by locale")
mentioned the LD version is affected by locale.

While I was here, I merged two sed invocations.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2022-09-29 04:40:15 +09:00
Masahiro Yamada
2df8220cc5 kbuild: build init/built-in.a just once
Kbuild builds init/built-in.a twice; first during the ordinary
directory descending, second from scripts/link-vmlinux.sh.

We do this because UTS_VERSION contains the build version and the
timestamp. We cannot update it during the normal directory traversal
since we do not yet know if we need to update vmlinux. UTS_VERSION is
temporarily calculated, but omitted from the update check. Otherwise,
vmlinux would be rebuilt every time.

When Kbuild results in running link-vmlinux.sh, it increments the
version number in the .version file and takes the timestamp at that
time to really fix UTS_VERSION.

However, updating the same file twice is a footgun. To avoid nasty
timestamp issues, all build artifacts that depend on init/built-in.a
are atomically generated in link-vmlinux.sh, where some of them do not
need rebuilding.

To fix this issue, this commit changes as follows:

[1] Split UTS_VERSION out to include/generated/utsversion.h from
    include/generated/compile.h

    include/generated/utsversion.h is generated just before the
    vmlinux link. It is generated under include/generated/ because
    some decompressors (s390, x86) use UTS_VERSION.

[2] Split init_uts_ns and linux_banner out to init/version-timestamp.c
    from init/version.c

    init_uts_ns and linux_banner contain UTS_VERSION. During the ordinary
    directory descending, they are compiled with __weak and used to
    determine if vmlinux needs relinking. Just before the vmlinux link,
    they are compiled without __weak to embed the real version and
    timestamp.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2022-09-29 04:40:15 +09:00
Masahiro Yamada
d724b578a1 kbuild: do not deduplicate modules.order
The AWK code was added to deduplicate modules.order in case $(obj-m)
contains the same module multiple times, but it is actually unneeded
since commit b2c8855491 ("kbuild: update modules.order only when
contained modules are updated").

The list is already deduplicated before being processed by AWK because
$^ is the deduplicated list of prerequisites.
(Please note the real-prereqs macro uses $^)

Yet, modules.order will contain duplication if two different Makefiles
build the same module:

  foo/Makefile:

      obj-m += bar/baz.o

  foo/bar/Makefile:

      obj-m += baz.o

However, the parallel builds cannot properly handle this case in the
first place. So, it is better to let it fail (as already done by
scripts/modules-check.sh).

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2022-09-29 04:40:14 +09:00
Masahiro Yamada
b10fdeea8c kbuild: check sha1sum just once for each atomic header
It is unneeded to check the sha1sum every time.

Create the timestamp files to manage it.

Add '.' to clean-dirs because 'make clean' must visit ./Kbuild to
clean up the timestamp files.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2022-09-29 04:40:14 +09:00
Masahiro Yamada
a3c4d4abaa kbuild: hard-code KBUILD_ALLDIRS in scripts/Makefile.package
My future plan is to list subdirectories in ./Kbuild. When it occurs,
$(vmlinux-alldirs) will not contain all subdirectories.

Let's hard-code the directory list until I get around to implementing
a more sophisticated way for generating a source tarball.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
2022-09-29 04:38:57 +09:00
Masahiro Yamada
a7f3257da8 kbuild: remove the target in signal traps when interrupted
When receiving some signal, GNU Make automatically deletes the target if
it has already been changed by the interrupted recipe.

If the target is possibly incomplete due to interruption, it must be
deleted so that it will be remade from scratch on the next run of make.
Otherwise, the target would remain corrupted permanently because its
timestamp had already been updated.

Thanks to this behavior of Make, you can stop the build any time by
pressing Ctrl-C, and just run 'make' to resume it.

Kbuild also relies on this feature, but it is equivalently important
for any build systems that make decisions based on timestamps (if you
want to support Ctrl-C reliably).

However, this does not always work as claimed; Make immediately dies
with Ctrl-C if its stderr goes into a pipe.

  [Test Makefile]

    foo:
            echo hello > $@
            sleep 3
            echo world >> $@

  [Test Result]

    $ make                         # hit Ctrl-C
    echo hello > foo
    sleep 3
    ^Cmake: *** Deleting file 'foo'
    make: *** [Makefile:3: foo] Interrupt

    $ make 2>&1 | cat              # hit Ctrl-C
    echo hello > foo
    sleep 3
    ^C$                            # 'foo' is often left-over

The reason is because SIGINT is sent to the entire process group.
In this example, SIGINT kills 'cat', and 'make' writes the message to
the closed pipe, then dies with SIGPIPE before cleaning the target.

A typical bad scenario (as reported by [1], [2]) is to save build log
by using the 'tee' command:

    $ make 2>&1 | tee log

This can be problematic for any build systems based on Make, so I hope
it will be fixed in GNU Make. The maintainer of GNU Make stated this is
a long-standing issue and difficult to fix [3]. It has not been fixed
yet as of writing.

So, we cannot rely on Make cleaning the target. We can do it by
ourselves, in signal traps.

As far as I understand, Make takes care of SIGHUP, SIGINT, SIGQUIT, and
SITERM for the target removal. I added the traps for them, and also for
SIGPIPE just in case cmd_* rule prints something to stdout or stderr
(but I did not observe an actual case where SIGPIPE was triggered).

[Note 1]

The trap handler might be worth explaining.

    rm -f $@; trap - $(sig); kill -s $(sig) $$

This lets the shell kill itself by the signal it caught, so the parent
process can tell the child has exited on the signal. Generally, this is
a proper manner for handling signals, in case the calling program (like
Bash) may monitor WIFSIGNALED() and WTERMSIG() for WCE although this may
not be a big deal here because GNU Make handles SIGHUP, SIGINT, SIGQUIT
in WUE and SIGTERM in IUE.

  IUE - Immediate Unconditional Exit
  WUE - Wait and Unconditional Exit
  WCE - Wait and Cooperative Exit

For details, see "Proper handling of SIGINT/SIGQUIT" [4].

[Note 2]

Reverting 392885ee82 ("kbuild: let fixdep directly write to .*.cmd
files") would directly address [1], but it only saves if_changed_dep.
As reported in [2], all commands that use redirection can potentially
leave an empty (i.e. broken) target.

[Note 3]

Another (even safer) approach might be to always write to a temporary
file, and rename it to $@ at the end of the recipe.

   <command>  > $(tmp-target)
   mv $(tmp-target) $@

It would require a lot of Makefile changes, and result in ugly code,
so I did not take it.

[Note 4]

A little more thoughts about a pattern rule with multiple targets (or
a grouped target).

    %.x %.y: %.z
            <recipe>

When interrupted, GNU Make deletes both %.x and %.y, while this solution
only deletes $@. Probably, this is not a big deal. The next run of make
will execute the rule again to create $@ along with the other files.

[1]: https://lore.kernel.org/all/YLeot94yAaM4xbMY@gmail.com/
[2]: https://lore.kernel.org/all/20220510221333.2770571-1-robh@kernel.org/
[3]: https://lists.gnu.org/archive/html/help-make/2021-06/msg00001.html
[4]: https://www.cons.org/cracauer/sigint.html

Fixes: 392885ee82 ("kbuild: let fixdep directly write to .*.cmd files")
Reported-by: Ingo Molnar <mingo@kernel.org>
Reported-by: Rob Herring <robh@kernel.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Tested-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
2022-09-29 02:00:29 +09:00
Nick Desaulniers
32ef9e5054 Makefile.debug: re-enable debug info for .S files
Alexey reported that the fraction of unknown filename instances in
kallsyms grew from ~0.3% to ~10% recently; Bill and Greg tracked it down
to assembler defined symbols, which regressed as a result of:

commit b8a9092330 ("Kbuild: do not emit debug info for assembly with LLVM_IAS=1")

In that commit, I allude to restoring debug info for assembler defined
symbols in a follow up patch, but it seems I forgot to do so in

commit a66049e2cf ("Kbuild: make DWARF version a choice")

Link: https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=31bf18645d98b4d3d7357353be840e320649a67d
Fixes: b8a9092330 ("Kbuild: do not emit debug info for assembly with LLVM_IAS=1")
Reported-by: Alexey Alexandrov <aalexand@google.com>
Reported-by: Bill Wendling <morbo@google.com>
Reported-by: Greg Thelen <gthelen@google.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Suggested-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2022-09-24 11:19:19 +09:00
Nick Desaulniers
61f2b7c749 Makefile.debug: set -g unconditional on CONFIG_DEBUG_INFO_SPLIT
Dmitrii, Fangrui, and Mashahiro note:

  Before GCC 11 and Clang 12 -gsplit-dwarf implicitly uses -g2.

Fix CONFIG_DEBUG_INFO_SPLIT for gcc-11+ & clang-12+ which now need -g
specified in order for -gsplit-dwarf to work at all.

-gsplit-dwarf has been mutually exclusive with -g since support for
CONFIG_DEBUG_INFO_SPLIT was introduced in
commit 866ced950b ("kbuild: Support split debug info v4")
I don't think it ever needed to be.

Link: https://lore.kernel.org/lkml/20220815013317.26121-1-dmitrii.bundin.a@gmail.com/
Link: https://lore.kernel.org/lkml/CAK7LNARPAmsJD5XKAw7m_X2g7Fi-CAAsWDQiP7+ANBjkg7R7ng@mail.gmail.com/
Link: https://reviews.llvm.org/D80391
Cc: Andi Kleen <ak@linux.intel.com>
Reported-by: Dmitrii Bundin <dmitrii.bundin.a@gmail.com>
Reported-by: Fangrui Song <maskray@google.com>
Reported-by: Masahiro Yamada <masahiroy@kernel.org>
Suggested-by: Dmitrii Bundin <dmitrii.bundin.a@gmail.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2022-09-24 11:12:54 +09:00
Zeng Heng
03764b30a4 Kconfig: remove unused function 'menu_get_root_menu'
There is nowhere calling `menu_get_root_menu` function,
so remove it.

Signed-off-by: Zeng Heng <zengheng4@huawei.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2022-09-24 04:30:30 +09:00
yangxingwu
237fe72749 scripts/clang-tools: remove unused module
Remove unused imported 'os' module.

Signed-off-by: yangxingwu <xingwu.yang@gmail.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2022-09-24 04:30:06 +09:00
Linus Torvalds
4ed9c1e971 Kbuild fixes for v6.0 (2nd)
- Remove unused scripts/gcc-ld script
 
  - Add zstd support to scripts/extract-ikconfig
 
  - Check 'make headers' for UML
 
  - Fix scripts/mksysmap to ignore local symbols
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Merge tag 'kbuild-fixes-v6.0-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild fixes from Masahiro Yamada:

 - Remove unused scripts/gcc-ld script

 - Add zstd support to scripts/extract-ikconfig

 - Check 'make headers' for UML

 - Fix scripts/mksysmap to ignore local symbols

* tag 'kbuild-fixes-v6.0-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
  mksysmap: Fix the mismatch of 'L0' symbols in System.map
  kbuild: disable header exports for UML in a straightforward way
  scripts/extract-ikconfig: add zstd compression support
  scripts: remove obsolete gcc-ld script
2022-09-11 15:16:47 -04:00
Youling Tang
c17a253870 mksysmap: Fix the mismatch of 'L0' symbols in System.map
When System.map was generated, the kernel used mksysmap to filter the
kernel symbols, we need to filter "L0" symbols in LoongArch architecture.

$ cat System.map | grep L0
9000000000221540 t L0

The L0 symbol exists in System.map, but not in .tmp_System.map. When
"cmp -s System.map .tmp_System.map" will show "Inconsistent kallsyms
data" error message in link-vmlinux.sh script.

Signed-off-by: Youling Tang <tangyouling@loongson.cn>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2022-09-10 05:35:13 +09:00
Nick Desaulniers
b0839b281c Makefile.extrawarn: re-enable -Wformat for clang; take 2
-Wformat was recently re-enabled for builds with clang, then quickly
re-disabled, due to concerns stemming from the frequency of default
argument promotion related warning instances.

commit 258fafcd06 ("Makefile.extrawarn: re-enable -Wformat for clang")
commit 21f9c8a13b ("Revert "Makefile.extrawarn: re-enable -Wformat for clang"")

ISO WG14 has ratified N2562 to address default argument promotion
explicitly for printf, as part of the upcoming ISO C2X standard.

The behavior of clang was changed in clang-16 to not warn for the cited
cases in all language modes.

Add a version check, so that users of clang-16 now get the full effect
of -Wformat. For older clang versions, re-enable flags under the
-Wformat group that way users still get some useful checks related to
format strings, without noisy default argument promotion warnings. I
intentionally omitted -Wformat-y2k and -Wformat-security from being
re-enabled, which are also part of -Wformat in clang-16.

Link: https://github.com/ClangBuiltLinux/linux/issues/378
Link: https://github.com/llvm/llvm-project/issues/57102
Link: https://www.open-std.org/jtc1/sc22/wg14/www/docs/n2562.pdf
Suggested-by: Justin Stitt <jstitt007@gmail.com>
Suggested-by: Nathan Chancellor <nathan@kernel.org>
Suggested-by: Youngmin Nam <youngmin.nam@samsung.com>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-09-04 11:15:50 -07:00
Thitat Auareesuksakul
c11efc57d4 scripts/extract-ikconfig: add zstd compression support
Add extract-ikconfig support for kernel images compressed with zstd.

Signed-off-by: Thitat Auareesuksakul <thitat@flux.ci>
Tested-by: Nicolas Schier <n.schier@avm.de>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2022-08-29 13:58:47 +09:00
Lukas Bulwahn
86879fd277 scripts: remove obsolete gcc-ld script
Since commit 8564ed2b38 ("Kbuild, lto: Add a gcc-ld script to let run gcc
as ld") in 2014, there was not specific work on this the gcc-ld script
other than treewide clean-ups.

There are no users within the kernel tree, and probably no out-of-tree
users either, and there is no dedicated maintainer in MAINTAINERS.

Delete this obsolete gcc-ld script.

Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2022-08-29 13:58:47 +09:00
Nick Desaulniers
a0a12c3ed0 asm goto: eradicate CC_HAS_ASM_GOTO
GCC has supported asm goto since 4.5, and Clang has since version 9.0.0.
The minimum supported versions of these tools for the build according to
Documentation/process/changes.rst are 5.1 and 11.0.0 respectively.

Remove the feature detection script, Kconfig option, and clean up some
fallback code that is no longer supported.

The removed script was also testing for a GCC specific bug that was
fixed in the 4.7 release.

Also remove workarounds for bpftrace using clang older than 9.0.0, since
other BPF backend fixes are required at this point.

Link: https://lore.kernel.org/lkml/CAK7LNATSr=BXKfkdW8f-H5VT_w=xBpT2ZQcZ7rm6JfkdE+QnmA@mail.gmail.com/
Link: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48637
Acked-by: Borislav Petkov <bp@suse.de>
Suggested-by: Masahiro Yamada <masahiroy@kernel.org>
Suggested-by: Alexei Starovoitov <alexei.starovoitov@gmail.com>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-08-21 10:06:28 -07:00
Linus Torvalds
15b3f48a43 Kbuild fixes for v6.0
- Fix module versioning broken on some architectures
 
  - Make dummy-tools enable CONFIG_PPC_LONG_DOUBLE_128
 
  - Remove -Wformat-zero-length, which has no warning instance
 
  - Fix the order between drivers and libs in modules.order
 
  - Fix false-positive warnings in clang-analyzer
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Merge tag 'kbuild-fixes-v6.0' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild fixes from Masahiro Yamada:

 - Fix module versioning broken on some architectures

 - Make dummy-tools enable CONFIG_PPC_LONG_DOUBLE_128

 - Remove -Wformat-zero-length, which has no warning instance

 - Fix the order between drivers and libs in modules.order

 - Fix false-positive warnings in clang-analyzer

* tag 'kbuild-fixes-v6.0' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
  scripts/clang-tools: Remove DeprecatedOrUnsafeBufferHandling check
  kbuild: fix the modules order between drivers and libs
  scripts/Makefile.extrawarn: Do not disable clang's -Wformat-zero-length
  kbuild: dummy-tools: pretend we understand __LONG_DOUBLE_128__
  modpost: fix module versioning when a symbol lacks valid CRC
2022-08-20 14:55:38 -07:00
Guru Das Srinagesh
4be72c1b9f scripts/clang-tools: Remove DeprecatedOrUnsafeBufferHandling check
This `clang-analyzer` check flags the use of memset(), suggesting a more
secure version of the API, such as memset_s(), which does not exist in
the kernel:

  warning: Call to function 'memset' is insecure as it does not provide
  security checks introduced in the C11 standard. Replace with analogous
  functions that support length arguments or provides boundary checks such
  as 'memset_s' in case of C11
  [clang-analyzer-security.insecureAPI.DeprecatedOrUnsafeBufferHandling]

Signed-off-by: Guru Das Srinagesh <quic_gurus@quicinc.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2022-08-21 02:47:49 +09:00
Nathan Chancellor
370655bc18 scripts/Makefile.extrawarn: Do not disable clang's -Wformat-zero-length
There are no instances of this warning in the tree across several
difference architectures and configurations. This was added by
commit 26ea6bb1fe ("kbuild, LLVMLinux: Supress warnings unless W=1-3")
back in 2014, where it might have been necessary, but there are no
instances of it now so stop disabling it to increase warning coverage
for clang.

Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2022-08-21 02:47:48 +09:00
Jiri Slaby
0df499eaf3 kbuild: dummy-tools: pretend we understand __LONG_DOUBLE_128__
There is a test in powerpc's Kconfig which checks __LONG_DOUBLE_128__
and sets CONFIG_PPC_LONG_DOUBLE_128 if it is understood by the compiler.

We currently don't handle it, so this results in PPC_LONG_DOUBLE_128 not
being in super-config generated by dummy-tools. So take this into
account in the gcc script and preprocess __LONG_DOUBLE_128__ as "1".

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2022-08-21 02:47:48 +09:00
Masahiro Yamada
5b8a9a8fd1 modpost: fix module versioning when a symbol lacks valid CRC
Since commit 7b4537199a ("kbuild: link symbol CRCs at final link,
removing CONFIG_MODULE_REL_CRCS"), module versioning is broken on
some architectures. Loading a module fails with "disagrees about
version of symbol module_layout".

On such architectures (e.g. ARCH=sparc build with sparc64_defconfig),
modpost shows a warning, like follows:

  WARNING: modpost: EXPORT symbol "_mcount" [vmlinux] version generation failed, symbol will not be versioned.
  Is "_mcount" prototyped in <asm/asm-prototypes.h>?

Previously, it was a harmless warning (CRC check was just skipped),
but now wrong CRCs are used for comparison because invalid CRCs are
just skipped.

  $ sparc64-linux-gnu-nm -n vmlinux
    [snip]
  0000000000c2cea0 r __ksymtab__kstrtol
  0000000000c2ceb8 r __ksymtab__kstrtoul
  0000000000c2ced0 r __ksymtab__local_bh_enable
  0000000000c2cee8 r __ksymtab__mcount
  0000000000c2cf00 r __ksymtab__printk
  0000000000c2cf18 r __ksymtab__raw_read_lock
  0000000000c2cf30 r __ksymtab__raw_read_lock_bh
    [snip]
  0000000000c53b34 D __crc__kstrtol
  0000000000c53b38 D __crc__kstrtoul
  0000000000c53b3c D __crc__local_bh_enable
  0000000000c53b40 D __crc__printk
  0000000000c53b44 D __crc__raw_read_lock
  0000000000c53b48 D __crc__raw_read_lock_bh

Please notice __crc__mcount is missing here.

When the module subsystem looks up a CRC that comes after, it results
in reading out a wrong address. For example, when __crc__printk is
needed, the module subsystem reads 0xc53b44 instead of 0xc53b40.

All CRC entries must be output for correct index accessing. Invalid
CRCs will be unused, but are needed to keep the one-to-one mapping
between __ksymtab_* and __crc_*.

The best is to fix all modpost warnings, but several warnings are still
remaining on less popular architectures.

Fixes: 7b4537199a ("kbuild: link symbol CRCs at final link, removing CONFIG_MODULE_REL_CRCS")
Reported-by: matoro <matoro_mailinglist_kernel@matoro.tk>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Tested-by: matoro <matoro_mailinglist_kernel@matoro.tk>
2022-08-21 02:47:36 +09:00
Linus Torvalds
e45c890140 hardening fixes for v6.0-rc2
- Also undef LATENT_ENTROPY_PLUGIN for per-file disabling (Andrew Donnellan)
 
 - Return EFAULT on copy_from_user() failures in LoadPin (Kees Cook)
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Merge tag 'hardening-v6.0-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux

Pull hardening fixes from Kees Cook:

 - Also undef LATENT_ENTROPY_PLUGIN for per-file disabling (Andrew
   Donnellan)

 - Return EFAULT on copy_from_user() failures in LoadPin (Kees Cook)

* tag 'hardening-v6.0-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  gcc-plugins: Undefine LATENT_ENTROPY_PLUGIN when plugin disabled for a file
  LoadPin: Return EFAULT on copy_from_user() failures
2022-08-19 13:56:14 -07:00
Andrew Donnellan
012e8d2034 gcc-plugins: Undefine LATENT_ENTROPY_PLUGIN when plugin disabled for a file
Commit 36d4b36b69 ("lib/nodemask: inline next_node_in() and
node_random()") refactored some code by moving node_random() from
lib/nodemask.c to include/linux/nodemask.h, thus requiring nodemask.h to
include random.h, which conditionally defines add_latent_entropy()
depending on whether the macro LATENT_ENTROPY_PLUGIN is defined.

This broke the build on powerpc, where nodemask.h is indirectly included
in arch/powerpc/kernel/prom_init.c, part of the early boot machinery that
is excluded from the latent entropy plugin using
DISABLE_LATENT_ENTROPY_PLUGIN. It turns out that while we add a gcc flag
to disable the actual plugin, we don't undefine LATENT_ENTROPY_PLUGIN.

This leads to the following:

    CC      arch/powerpc/kernel/prom_init.o
  In file included from ./include/linux/nodemask.h:97,
                   from ./include/linux/mmzone.h:17,
                   from ./include/linux/gfp.h:7,
                   from ./include/linux/xarray.h:15,
                   from ./include/linux/radix-tree.h:21,
                   from ./include/linux/idr.h:15,
                   from ./include/linux/kernfs.h:12,
                   from ./include/linux/sysfs.h:16,
                   from ./include/linux/kobject.h:20,
                   from ./include/linux/pci.h:35,
                   from arch/powerpc/kernel/prom_init.c:24:
  ./include/linux/random.h: In function 'add_latent_entropy':
  ./include/linux/random.h:25:46: error: 'latent_entropy' undeclared (first use in this function); did you mean 'add_latent_entropy'?
     25 |         add_device_randomness((const void *)&latent_entropy, sizeof(latent_entropy));
        |                                              ^~~~~~~~~~~~~~
        |                                              add_latent_entropy
  ./include/linux/random.h:25:46: note: each undeclared identifier is reported only once for each function it appears in
  make[2]: *** [scripts/Makefile.build:249: arch/powerpc/kernel/prom_init.o] Fehler 1
  make[1]: *** [scripts/Makefile.build:465: arch/powerpc/kernel] Fehler 2
  make: *** [Makefile:1855: arch/powerpc] Error 2

Change the DISABLE_LATENT_ENTROPY_PLUGIN flags to undefine
LATENT_ENTROPY_PLUGIN for files where the plugin is disabled.

Cc: Yury Norov <yury.norov@gmail.com>
Fixes: 38addce8b6 ("gcc-plugins: Add latent_entropy plugin")
Link: https://bugzilla.kernel.org/show_bug.cgi?id=216367
Link: https://lore.kernel.org/linuxppc-dev/alpine.DEB.2.22.394.2208152006320.289321@ramsan.of.borg/
Reported-by: Erhard Furtner <erhard_f@mailbox.org>
Signed-off-by: Andrew Donnellan <ajd@linux.ibm.com>
Reviewed-by: Yury Norov <yury.norov@gmail.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20220816051720.44108-1-ajd@linux.ibm.com
2022-08-16 12:25:53 -07:00
Linus Torvalds
69dac8e431 RISC-V Patches for the 5.20 Merge Window, Part 2
There's still a handful of new features in here, but there are a lot of
 fixes/cleanups as well:
 
 * Support for the Zicbom for explicit cache-block management, along with
   the necessary bits to make the non-standard cache management ops on
   the Allwinner D1 function.
 * Support for the Zihintpause extension, which codifies a go-slow
   instruction used for cpu_relax().
 * Support for the Sstc extension for supervisor-mode timer/counter
   management.
 * Many device tree fixes and cleanups, including a large set for the
   Canaan device trees.
 * A handful of fixes and cleanups for the PMU driver.
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Merge tag 'riscv-for-linus-5.20-mw2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux

Pull more RISC-V updates from Palmer Dabbelt:
 "There's still a handful of new features in here, but there are a lot
  of fixes/cleanups as well:

   - Support for the Zicbom extension for explicit cache-block
     management, along with the necessary bits to make the non-standard
     cache management ops on the Allwinner D1 function

   - Support for the Zihintpause extension, which codifies a go-slow
     instruction used for cpu_relax()

   - Support for the Sstc extension for supervisor-mode timer/counter
     management

   - Many device tree fixes and cleanups, including a large set for the
     Canaan device trees

   - A handful of fixes and cleanups for the PMU driver"

* tag 'riscv-for-linus-5.20-mw2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux: (43 commits)
  dt-bindings: gpio: sifive: add gpio-line-names
  wireguard: selftests: set CONFIG_NONPORTABLE on riscv32
  RISC-V: KVM: Support sstc extension
  RISC-V: Improve SBI definitions
  RISC-V: Move counter info definition to sbi header file
  RISC-V: Fix SBI PMU calls for RV32
  RISC-V: Update user page mapping only once during start
  RISC-V: Fix counter restart during overflow for RV32
  RISC-V: Prefer sstc extension if available
  RISC-V: Enable sstc extension parsing from DT
  RISC-V: Add SSTC extension CSR details
  riscv:uprobe fix SR_SPIE set/clear handling
  dt-bindings: riscv: fix SiFive l2-cache's cache-sets
  riscv: ensure cpu_ops_sbi is declared
  RISC-V: cpu_ops_spinwait.c should include head.h
  RISC-V: Declare cpu_ops_spinwait in <asm/cpu_ops.h>
  riscv: dts: starfive: correct number of external interrupts
  riscv: dts: sifive unmatched: Add PWM controlled LEDs
  riscv/purgatory: Omit use of bin2c
  riscv/purgatory: hard-code obj-y in Makefile
  ...
2022-08-12 18:39:43 -07:00
Masahiro Yamada
d8357e3bf8
riscv/purgatory: Omit use of bin2c
The .incbin assembler directive is much faster than bin2c + $(CC).

Do similar refactoring as in commit 4c0f032d49 ("s390/purgatory:
Omit use of bin2c").

Please note the .quad directive matches to size_t in C (both 8 byte)
because the purgatory is compiled only for the 64-bit kernel.
(KEXEC_FILE depends on 64BIT).

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Link: https://lore.kernel.org/r/20220625223438.835408-2-masahiroy@kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
2022-08-11 09:32:34 -07:00
Linus Torvalds
21f9c8a13b Revert "Makefile.extrawarn: re-enable -Wformat for clang"
This reverts commit 258fafcd06.

The clang -Wformat warning is terminally broken, and the clang people
can't seem to get their act together.

This test program causes a warning with clang:

	#include <stdio.h>

	int main(int argc, char **argv)
	{
		printf("%hhu\n", 'a');
	}

resulting in

  t.c:5:19: warning: format specifies type 'unsigned char' but the argument has type 'int' [-Wformat]
          printf("%hhu\n", 'a');
                  ~~~~     ^~~
                  %d

and apparently clang people consider that a feature, because they don't
want to face the reality of how either C character constants, C
arithmetic, and C varargs functions work.

The rest of the world just shakes their head at that kind of
incompetence, and turns off -Wformat for clang again.

And no, the "you should use a pointless cast to shut this up" is not a
valid answer.  That warning should not exist in the first place, or at
least be optinal with some "-Wformat-me-harder" kind of option.

[ Admittedly, there's also very little reason to *ever* use '%hh[ud]' in
  C, but what little reason there is is entirely about 'I want to see
  only the low 8 bits of the argument'. So I would suggest nobody ever
  use that format in the first place, but if they do, the clang
  behavious is simply always wrong. Because '%hhu' takes an 'int'. It's
  that simple. ]

Reported-by: Sudip Mukherjee (Codethink) <sudipm.mukherjee@gmail.com>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-08-11 08:40:01 -07:00
Linus Torvalds
0af5cb349a Kbuild updates for v5.20
- Remove the support for -O3 (CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3)
 
  - Fix error of rpm-pkg cross-builds
 
  - Support riscv for checkstack tool
 
  - Re-enable -Wformwat warnings for Clang
 
  - Clean up modpost, Makefiles, and misc scripts
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Merge tag 'kbuild-v5.20' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild updates from Masahiro Yamada:

 - Remove the support for -O3 (CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3)

 - Fix error of rpm-pkg cross-builds

 - Support riscv for checkstack tool

 - Re-enable -Wformwat warnings for Clang

 - Clean up modpost, Makefiles, and misc scripts

* tag 'kbuild-v5.20' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (30 commits)
  modpost: remove .symbol_white_list field entirely
  modpost: remove unneeded .symbol_white_list initializers
  modpost: add PATTERNS() helper macro
  modpost: shorten warning messages in report_sec_mismatch()
  Revert "Kbuild, lto, workaround: Don't warn for initcall_reference in modpost"
  modpost: use more reliable way to get fromsec in section_rel(a)()
  modpost: add array range check to sec_name()
  modpost: refactor get_secindex()
  kbuild: set EXIT trap before creating temporary directory
  modpost: remove unused Elf_Sword macro
  Makefile.extrawarn: re-enable -Wformat for clang
  kbuild: add dtbs_prepare target
  kconfig: Qt5: tell the user which packages are required
  modpost: use sym_get_data() to get module device_table data
  modpost: drop executable ELF support
  checkstack: add riscv support for scripts/checkstack.pl
  kconfig: shorten the temporary directory name for cc-option
  scripts: headers_install.sh: Update config leak ignore entries
  kbuild: error out if $(INSTALL_MOD_PATH) contains % or :
  kbuild: error out if $(KBUILD_EXTMOD) contains % or :
  ...
2022-08-10 10:40:41 -07:00
Linus Torvalds
e74acdf55d Modules updates for 6.0
For the 6.0 merge window the modules code shifts to cleanup and minor fixes
 effort. This is becomes much easier to do and review now due to the code
 split to its own directory from effort on the last kernel release. I expect
 to see more of this with time and as we expand on test coverage in the future.
 The cleanups and fixes come from usual suspects such as Christophe Leroy and
 Aaron Tomlin but there are also some other contributors.
 
 One particular minor fix worth mentioning is from Helge Deller, where he spotted
 a *forever* incorrect natural alignment on both ELF section header tables:
 
   * .altinstructions
   * __bug_table sections
 
 A lot of back and forth went on in trying to determine the ill effects of this
 misalignment being present for years and it has been determined there should
 be no real ill effects unless you have a buggy exception handler. Helge actually
 hit one of these buggy exception handlers on parisc which is how he ended up
 spotting this issue. When implemented correctly these paths with incorrect
 misalignment would just mean a performance penalty, but given that we are
 dealing with alternatives on modules and with the __bug_table (where info
 regardign BUG()/WARN() file/line information associated with it is stored)
 this really shouldn't be a big deal.
 
 The only other change with mentioning is the kmap() with kmap_local_page()
 and my only concern with that was on what is done after preemption, but the
 virtual addresses are restored after preemption. This is only used on module
 decompression.
 
 This all has sit on linux-next for a while except the kmap stuff which has
 been there for 3 weeks.
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Merge tag 'modules-6.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux

Pull module updates from Luis Chamberlain:
 "For the 6.0 merge window the modules code shifts to cleanup and minor
  fixes effort. This becomes much easier to do and review now due to the
  code split to its own directory from effort on the last kernel
  release. I expect to see more of this with time and as we expand on
  test coverage in the future. The cleanups and fixes come from usual
  suspects such as Christophe Leroy and Aaron Tomlin but there are also
  some other contributors.

  One particular minor fix worth mentioning is from Helge Deller, where
  he spotted a *forever* incorrect natural alignment on both ELF section
  header tables:

    * .altinstructions
    * __bug_table sections

  A lot of back and forth went on in trying to determine the ill effects
  of this misalignment being present for years and it has been
  determined there should be no real ill effects unless you have a buggy
  exception handler. Helge actually hit one of these buggy exception
  handlers on parisc which is how he ended up spotting this issue. When
  implemented correctly these paths with incorrect misalignment would
  just mean a performance penalty, but given that we are dealing with
  alternatives on modules and with the __bug_table (where info regardign
  BUG()/WARN() file/line information associated with it is stored) this
  really shouldn't be a big deal.

  The only other change with mentioning is the kmap() with
  kmap_local_page() and my only concern with that was on what is done
  after preemption, but the virtual addresses are restored after
  preemption. This is only used on module decompression.

  This all has sit on linux-next for a while except the kmap stuff which
  has been there for 3 weeks"

* tag 'modules-6.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux:
  module: Replace kmap() with kmap_local_page()
  module: Show the last unloaded module's taint flag(s)
  module: Use strscpy() for last_unloaded_module
  module: Modify module_flags() to accept show_state argument
  module: Move module's Kconfig items in kernel/module/
  MAINTAINERS: Update file list for module maintainers
  module: Use vzalloc() instead of vmalloc()/memset(0)
  modules: Ensure natural alignment for .altinstructions and __bug_table sections
  module: Increase readability of module_kallsyms_lookup_name()
  module: Fix ERRORs reported by checkpatch.pl
  module: Add support for default value for module async_probe
2022-08-08 14:12:19 -07:00
Linus Torvalds
cab9de7169 Coccinelle semantic patch changes
The changes are as follows:
 
 * Update the semantic patches in the kernel that contain a URL for
   Coccinelle with a URL that is currently valid (from myself).
 
 * Add a semantic patch checking for unnecessary NULL tests on dev_{put,
   hold} functions (from Ziyang Xuan, followed bt a modification from
   myself).
 
 * Drop a semantic patch that replaces 0/1 by booleans, as this change was
   considered to be not worthwhile by some maintainers (from Steve Rostedt).
 
 * Extend an existing semantic patch with more checks for useless tests on
   variables addresses (from Jérémy Lefaure).
 
 Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>
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Merge tag 'coccinelle-for-5.20' of git://git.kernel.org/pub/scm/linux/kernel/git/jlawall/linux

Pull coccinelle semantic patch updates from Julia Lawall:

 - Update the semantic patches in the kernel that contain a URL for
   Coccinelle with a URL that is currently valid (from myself).

 - Add a semantic patch checking for unnecessary NULL tests on dev_{put,
   hold} functions (from Ziyang Xuan, followed bt a modification from
   myself).

 - Drop a semantic patch that replaces 0/1 by booleans, as this change
   was considered to be not worthwhile by some maintainers (from Steve
   Rostedt).

 - Extend an existing semantic patch with more checks for useless tests
   on variables addresses (from Jérémy Lefaure).

* tag 'coccinelle-for-5.20' of git://git.kernel.org/pub/scm/linux/kernel/git/jlawall/linux:
  update Coccinelle URL
  coccinelle: free: add version constraint
  scripts/coccinelle/free: add NULL test before dev_{put, hold} functions
  coccinelle: Remove script that checks replacing 0/1 with false/true in functions returning bool
  coccinelle: Extend address test from ifaddr semantic patch to test expressions
2022-08-08 09:42:04 -07:00
Julia Lawall
f01701cec8 update Coccinelle URL
Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>
2022-08-07 21:30:36 +02:00
Julia Lawall
18c06cf868 coccinelle: free: add version constraint
The various functions contain a NULL check starting in v5.15.

Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>
2022-08-07 21:30:24 +02:00
Linus Torvalds
eb5699ba31 Updates to various subsystems which I help look after. lib, ocfs2,
fatfs, autofs, squashfs, procfs, etc.
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Merge tag 'mm-nonmm-stable-2022-08-06-2' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull misc updates from Andrew Morton:
 "Updates to various subsystems which I help look after. lib, ocfs2,
  fatfs, autofs, squashfs, procfs, etc. A relatively small amount of
  material this time"

* tag 'mm-nonmm-stable-2022-08-06-2' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (72 commits)
  scripts/gdb: ensure the absolute path is generated on initial source
  MAINTAINERS: kunit: add David Gow as a maintainer of KUnit
  mailmap: add linux.dev alias for Brendan Higgins
  mailmap: update Kirill's email
  profile: setup_profiling_timer() is moslty not implemented
  ocfs2: fix a typo in a comment
  ocfs2: use the bitmap API to simplify code
  ocfs2: remove some useless functions
  lib/mpi: fix typo 'the the' in comment
  proc: add some (hopefully) insightful comments
  bdi: remove enum wb_congested_state
  kernel/hung_task: fix address space of proc_dohung_task_timeout_secs
  lib/lzo/lzo1x_compress.c: replace ternary operator with min() and min_t()
  squashfs: support reading fragments in readahead call
  squashfs: implement readahead
  squashfs: always build "file direct" version of page actor
  Revert "squashfs: provide backing_dev_info in order to disable read-ahead"
  fs/ocfs2: Fix spelling typo in comment
  ia64: old_rr4 added under CONFIG_HUGETLB_PAGE
  proc: fix test for "vsyscall=xonly" boot option
  ...
2022-08-07 10:03:24 -07:00
Linus Torvalds
592d8362bc Misc fixes to kprobes and the faddr2line script, plus a cleanup.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'perf-urgent-2022-08-06' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull perf fixes from Ingo Molnar:
 "Misc fixes to kprobes and the faddr2line script, plus a cleanup"

* tag 'perf-urgent-2022-08-06' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/core: Fix ';;' typo
  scripts/faddr2line: Add CONFIG_DEBUG_INFO check
  scripts/faddr2line: Fix vmlinux detection on arm64
  x86/kprobes: Update kcb status flag after singlestepping
  kprobes: Forbid probing on trampoline and BPF code areas
2022-08-06 17:28:12 -07:00
Linus Torvalds
cae4199f93 powerpc updates for 6.0
- Add support for syscall stack randomization.
 
  - Add support for atomic operations to the 32 & 64-bit BPF JIT.
 
  - Full support for KASAN on 64-bit Book3E.
 
  - Add a watchdog driver for the new PowerVM hypervisor watchdog.
 
  - Add a number of new selftests for the Power10 PMU support.
 
  - Add a driver for the PowerVM Platform KeyStore.
 
  - Increase the NMI watchdog timeout during live partition migration, to avoid timeouts
    due to increased memory access latency.
 
  - Add support for using the 'linux,pci-domain' device tree property for PCI domain
    assignment.
 
  - Many other small features and fixes.
 
 Thanks to: Alexey Kardashevskiy, Andy Shevchenko, Arnd Bergmann, Athira Rajeev, Bagas
 Sanjaya, Christophe Leroy, Erhard Furtner, Fabiano Rosas, Greg Kroah-Hartman, Greg Kurz,
 Haowen Bai, Hari Bathini, Jason A. Donenfeld, Jason Wang, Jiang Jian, Joel Stanley, Juerg
 Haefliger, Kajol Jain, Kees Cook, Laurent Dufour, Madhavan Srinivasan, Masahiro Yamada,
 Maxime Bizon, Miaoqian Lin, Murilo Opsfelder Araújo, Nathan Lynch, Naveen N. Rao, Nayna
 Jain, Nicholas Piggin, Ning Qiang, Pali Rohár, Petr Mladek, Rashmica Gupta, Sachin Sant,
 Scott Cheloha, Segher Boessenkool, Stephen Rothwell, Uwe Kleine-König, Wolfram Sang, Xiu
 Jianfeng, Zhouyi Zhou.
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Merge tag 'powerpc-6.0-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc updates from Michael Ellerman:

 - Add support for syscall stack randomization

 - Add support for atomic operations to the 32 & 64-bit BPF JIT

 - Full support for KASAN on 64-bit Book3E

 - Add a watchdog driver for the new PowerVM hypervisor watchdog

 - Add a number of new selftests for the Power10 PMU support

 - Add a driver for the PowerVM Platform KeyStore

 - Increase the NMI watchdog timeout during live partition migration, to
   avoid timeouts due to increased memory access latency

 - Add support for using the 'linux,pci-domain' device tree property for
   PCI domain assignment

 - Many other small features and fixes

Thanks to Alexey Kardashevskiy, Andy Shevchenko, Arnd Bergmann, Athira
Rajeev, Bagas Sanjaya, Christophe Leroy, Erhard Furtner, Fabiano Rosas,
Greg Kroah-Hartman, Greg Kurz, Haowen Bai, Hari Bathini, Jason A.
Donenfeld, Jason Wang, Jiang Jian, Joel Stanley, Juerg Haefliger, Kajol
Jain, Kees Cook, Laurent Dufour, Madhavan Srinivasan, Masahiro Yamada,
Maxime Bizon, Miaoqian Lin, Murilo Opsfelder Araújo, Nathan Lynch,
Naveen N.  Rao, Nayna Jain, Nicholas Piggin, Ning Qiang, Pali Rohár,
Petr Mladek, Rashmica Gupta, Sachin Sant, Scott Cheloha, Segher
Boessenkool, Stephen Rothwell, Uwe Kleine-König, Wolfram Sang, Xiu
Jianfeng, and Zhouyi Zhou.

* tag 'powerpc-6.0-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (191 commits)
  powerpc/64e: Fix kexec build error
  EDAC/ppc_4xx: Include required of_irq header directly
  powerpc/pci: Fix PHB numbering when using opal-phbid
  powerpc/64: Init jump labels before parse_early_param()
  selftests/powerpc: Avoid GCC 12 uninitialised variable warning
  powerpc/cell/axon_msi: Fix refcount leak in setup_msi_msg_address
  powerpc/xive: Fix refcount leak in xive_get_max_prio
  powerpc/spufs: Fix refcount leak in spufs_init_isolated_loader
  powerpc/perf: Include caps feature for power10 DD1 version
  powerpc: add support for syscall stack randomization
  powerpc: Move system_call_exception() to syscall.c
  powerpc/powernv: rename remaining rng powernv_ functions to pnv_
  powerpc/powernv/kvm: Use darn for H_RANDOM on Power9
  powerpc/powernv: Avoid crashing if rng is NULL
  selftests/powerpc: Fix matrix multiply assist test
  powerpc/signal: Update comment for clarity
  powerpc: make facility_unavailable_exception 64s
  powerpc/platforms/83xx/suspend: Remove write-only global variable
  powerpc/platforms/83xx/suspend: Prevent unloading the driver
  powerpc/platforms/83xx/suspend: Reorder to get rid of a forward declaration
  ...
2022-08-06 16:38:17 -07:00
Linus Torvalds
f20c95b46b tpmdd updates for Linux v5.20
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Merge tag 'tpmdd-next-v5.20' of git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd

Pull tpm updates from Jarkko Sakkinen:
 "Mostly TPM and also few keyring fixes"

* tag 'tpmdd-next-v5.20' of git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd:
  tpm: Add check for Failure mode for TPM2 modules
  tpm: eventlog: Fix section mismatch for DEBUG_SECTION_MISMATCH
  tpm: fix platform_no_drv_owner.cocci warning
  KEYS: asymmetric: enforce SM2 signature use pkey algo
  pkcs7: support EC-RDSA/streebog in SignerInfo
  pkcs7: parser support SM2 and SM3 algorithms combination
  sign-file: Fix confusing error messages
  X.509: Support parsing certificate using SM2 algorithm
  tpm: Add tpm_tis_i2c backend for tpm_tis_core
  tpm: Add tpm_tis_verify_crc to the tpm_tis_phy_ops protocol layer
  dt-bindings: trivial-devices: Add Infineon SLB9673 TPM
  tpm: Add upgrade/reduced mode support for TPM1.2 modules
2022-08-06 09:43:02 -07:00
Linus Torvalds
a1b02751d6 Sane printk changes for 5.20
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Merge tag 'printk-for-5.20-sane' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux

Pull printk updates from Petr Mladek:

 - Allow reading kernel log in gdb even on 32 bits systems

 - More granular check of the buffer usage in printf selftest

 - Clang warning fix

* tag 'printk-for-5.20-sane' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux:
  lib/test_printf.c: fix clang -Wformat warnings
  scripts/gdb: fix 'lx-dmesg' on 32 bits arch
  lib/test_printf.c: split write-beyond-buffer check in two
2022-08-05 09:54:36 -07:00
Linus Torvalds
965a9d75e3 Tracing updates for 5.20 / 6.0
- Runtime verification infrastructure
   This is the biggest change for this pull request. It introduces the
   runtime verification that is necessary for running Linux on safety
   critical systems. It allows for deterministic automata models to be
   inserted into the kernel that will attach to tracepoints, where the
   information on these tracepoints will move the model from state to state.
   If a state is encountered that does not belong to the model, it will then
   activate a given reactor, that could just inform the user or even panic
   the kernel (for which safety critical systems will detect and can recover
   from).
 
 - Two monitor models are also added: Wakeup In Preemptive (WIP - not to be
   confused with "work in progress"), and Wakeup While Not Running (WWNR).
 
 - Added __vstring() helper to the TRACE_EVENT() macro to replace several
   vsnprintf() usages that were all doing it wrong.
 
 - eprobes now can have their event autogenerated when the event name is left
   off.
 
 - The rest is various cleanups and fixes.
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Merge tag 'trace-v6.0' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pull tracing updates from Steven Rostedt:

 - Runtime verification infrastructure

   This is the biggest change here. It introduces the runtime
   verification that is necessary for running Linux on safety critical
   systems.

   It allows for deterministic automata models to be inserted into the
   kernel that will attach to tracepoints, where the information on
   these tracepoints will move the model from state to state.

   If a state is encountered that does not belong to the model, it will
   then activate a given reactor, that could just inform the user or
   even panic the kernel (for which safety critical systems will detect
   and can recover from).

 - Two monitor models are also added: Wakeup In Preemptive (WIP - not to
   be confused with "work in progress"), and Wakeup While Not Running
   (WWNR).

 - Added __vstring() helper to the TRACE_EVENT() macro to replace
   several vsnprintf() usages that were all doing it wrong.

 - eprobes now can have their event autogenerated when the event name is
   left off.

 - The rest is various cleanups and fixes.

* tag 'trace-v6.0' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (50 commits)
  rv: Unlock on error path in rv_unregister_reactor()
  tracing: Use alignof__(struct {type b;}) instead of offsetof()
  tracing/eprobe: Show syntax error logs in error_log file
  scripts/tracing: Fix typo 'the the' in comment
  tracepoints: It is CONFIG_TRACEPOINTS not CONFIG_TRACEPOINT
  tracing: Use free_trace_buffer() in allocate_trace_buffers()
  tracing: Use a struct alignof to determine trace event field alignment
  rv/reactor: Add the panic reactor
  rv/reactor: Add the printk reactor
  rv/monitor: Add the wwnr monitor
  rv/monitor: Add the wip monitor
  rv/monitor: Add the wip monitor skeleton created by dot2k
  Documentation/rv: Add deterministic automata instrumentation documentation
  Documentation/rv: Add deterministic automata monitor synthesis documentation
  tools/rv: Add dot2k
  Documentation/rv: Add deterministic automaton documentation
  tools/rv: Add dot2c
  Documentation/rv: Add a basic documentation
  rv/include: Add instrumentation helper functions
  rv/include: Add deterministic automata monitor definition via C macros
  ...
2022-08-05 09:41:12 -07:00
Linus Torvalds
c1c76700a0 SPDX changes for 6.0-rc1
Here is the set of SPDX comment updates for 6.0-rc1.
 
 Nothing huge here, just a number of updated SPDX license tags and
 cleanups based on the review of a number of common patterns in GPLv2
 boilerplate text.  Also included in here are a few other minor updates,
 2 USB files, and one Documentation file update to get the SPDX lines
 correct.
 
 All of these have been in the linux-next tree for a very long time.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'spdx-6.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/spdx

Pull SPDX updates from Greg KH:
 "Here is the set of SPDX comment updates for 6.0-rc1.

  Nothing huge here, just a number of updated SPDX license tags and
  cleanups based on the review of a number of common patterns in GPLv2
  boilerplate text.

  Also included in here are a few other minor updates, two USB files,
  and one Documentation file update to get the SPDX lines correct.

  All of these have been in the linux-next tree for a very long time"

* tag 'spdx-6.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/spdx: (28 commits)
  Documentation: samsung-s3c24xx: Add blank line after SPDX directive
  x86/crypto: Remove stray comment terminator
  treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_406.RULE
  treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_398.RULE
  treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_391.RULE
  treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_390.RULE
  treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_385.RULE
  treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_320.RULE
  treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_319.RULE
  treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_318.RULE
  treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_298.RULE
  treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_292.RULE
  treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_179.RULE
  treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_168.RULE (part 2)
  treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_168.RULE (part 1)
  treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_160.RULE
  treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_152.RULE
  treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_149.RULE
  treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_147.RULE
  treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_133.RULE
  ...
2022-08-04 12:12:54 -07:00
Linus Torvalds
228dfe98a3 Char / Misc driver changes for 6.0-rc1
Here is the large set of char and misc and other driver subsystem
 changes for 6.0-rc1.
 
 Highlights include:
 	- large set of IIO driver updates, additions, and cleanups
 	- new habanalabs device support added (loads of register maps
 	  much like GPUs have)
 	- soundwire driver updates
 	- phy driver updates
 	- slimbus driver updates
 	- tiny virt driver fixes and updates
 	- misc driver fixes and updates
 	- interconnect driver updates
 	- hwtracing driver updates
 	- fpga driver updates
 	- extcon driver updates
 	- firmware driver updates
 	- counter driver update
 	- mhi driver fixes and updates
 	- binder driver fixes and updates
 	- speakup driver fixes
 
 Full details are in the long shortlog contents.
 
 All of these have been in linux-next for a while without any reported
 problems.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-6.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char / misc driver updates from Greg KH:
 "Here is the large set of char and misc and other driver subsystem
  changes for 6.0-rc1.

  Highlights include:

   - large set of IIO driver updates, additions, and cleanups

   - new habanalabs device support added (loads of register maps much
     like GPUs have)

   - soundwire driver updates

   - phy driver updates

   - slimbus driver updates

   - tiny virt driver fixes and updates

   - misc driver fixes and updates

   - interconnect driver updates

   - hwtracing driver updates

   - fpga driver updates

   - extcon driver updates

   - firmware driver updates

   - counter driver update

   - mhi driver fixes and updates

   - binder driver fixes and updates

   - speakup driver fixes

  All of these have been in linux-next for a while without any reported
  problems"

* tag 'char-misc-6.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (634 commits)
  drivers: lkdtm: fix clang -Wformat warning
  char: remove VR41XX related char driver
  misc: Mark MICROCODE_MINOR unused
  spmi: trace: fix stack-out-of-bound access in SPMI tracing functions
  dt-bindings: iio: adc: Add compatible for MT8188
  iio: light: isl29028: Fix the warning in isl29028_remove()
  iio: accel: sca3300: Extend the trigger buffer from 16 to 32 bytes
  iio: fix iio_format_avail_range() printing for none IIO_VAL_INT
  iio: adc: max1027: unlock on error path in max1027_read_single_value()
  iio: proximity: sx9324: add empty line in front of bullet list
  iio: magnetometer: hmc5843: Remove duplicate 'the'
  iio: magn: yas530: Use DEFINE_RUNTIME_DEV_PM_OPS() and pm_ptr() macros
  iio: magnetometer: ak8974: Use DEFINE_RUNTIME_DEV_PM_OPS() and pm_ptr() macros
  iio: light: veml6030: Use DEFINE_RUNTIME_DEV_PM_OPS() and pm_ptr() macros
  iio: light: vcnl4035: Use DEFINE_RUNTIME_DEV_PM_OPS() and pm_ptr() macros
  iio: light: vcnl4000: Use DEFINE_RUNTIME_DEV_PM_OPS() and pm_ptr() macros
  iio: light: tsl2591: Use DEFINE_RUNTIME_DEV_PM_OPS() and pm_ptr()
  iio: light: tsl2583: Use DEFINE_RUNTIME_DEV_PM_OPS and pm_ptr()
  iio: light: isl29028: Use DEFINE_RUNTIME_DEV_PM_OPS() and pm_ptr()
  iio: light: gp2ap002: Switch to DEFINE_RUNTIME_DEV_PM_OPS and pm_ptr()
  ...
2022-08-04 11:05:48 -07:00
Masahiro Yamada
672fb6740c modpost: remove .symbol_white_list field entirely
It is not so useful to have symbol whitelists in arrays. With this
over-engineering, the code is difficult to follow.

Let's do it more directly, and collect the relevant code to one place.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2022-08-04 20:32:13 +09:00