Re: [PATCH 5.15 000/141] 5.15.143-rc1 review

[Daniel Díaz]

Hello!

On 11/12/23 12:20 p. m., Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 5.15.143 release.
> There are 141 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Wed, 13 Dec 2023 18:19:59 +0000.
> Anything received after that time might be too late.
>
> The whole patch series can be found in one patch at:
> 	https://www.kernel.org/pub/linux/kernel/v5.x/stable-review/patch-5.15.143-rc1.gz
> or in the git tree and branch at:
> 	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-5.15.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h

We're seeing new warnings with GCC-8 and failures with GCC-12 on x86/i386:

-----8<-----
  In file included from /builds/linux/drivers/gpu/drm/i915/gem/i915_gem_context.c:2291:
  /builds/linux/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c: In function '__igt_ctx_sseu':
  /builds/linux/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c:1284:9: error: left shift of negative value [-Werror=shift-negative-value]
      ~(~0 << (hweight32(engine->sseu.subslice_mask) / 2));
           ^~
  cc1: all warnings being treated as errors
  make[5]: *** [/builds/linux/scripts/Makefile.build:289: drivers/gpu/drm/i915/gem/i915_gem_context.o] Error 1
  /builds/linux/drivers/gpu/drm/i915/i915_perf.c: In function 'get_default_sseu_config':
  /builds/linux/drivers/gpu/drm/i915/i915_perf.c:2817:9: error: left shift of negative value [-Werror=shift-negative-value]
      ~(~0 << (hweight8(out_sseu->subslice_mask) / 2));
           ^~
  cc1: all warnings being treated as errors
  make[5]: *** [/builds/linux/scripts/Makefile.build:289: drivers/gpu/drm/i915/i915_perf.o] Error 1
----->8-----

Bisection points to:

  commit 09ebdc1b3dfacc275d5eec3f1dcf632f18bbf5a8
  Author: Arnd Bergmann <arnd@xxxxxxxx>
  Date:   Tue Mar 8 22:56:14 2022 +0100

      Kbuild: move to -std=gnu11
      
      [ Upstream commit e8c07082a810fbb9db303a2b66b66b8d7e588b53 ]


For GCC-12 it's allmodconfig failing, for GCC-8 it's defconfig (i386_defconfig, x86_64_defconfig) just reporting new warnings.

Some reproducers:

  tuxmake --runtime podman --target-arch x86_64 --toolchain gcc-8 --kconfig x86_64_defconfig

  tuxmake --runtime podman --target-arch x86_64 --toolchain gcc-12 --kconfig allmodconfig


Reported-by: Linux Kernel Functional Testing <lkft@xxxxxxxxxx>

Greetings!

Daniel Díaz
daniel.diaz@xxxxxxxxxx