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-Wframe-larger-than in drivers/gpu/drm/amd/amdgpu/vcn_v5_0_0.c #2036

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nathanchance opened this issue Jul 3, 2024 · 1 comment
Open

-Wframe-larger-than in drivers/gpu/drm/amd/amdgpu/vcn_v5_0_0.c #2036

nathanchance opened this issue Jul 3, 2024 · 1 comment
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-Wframe-larger-than= [ARCH] powerpc This bug impacts ARCH=powerpc Reported upstream This bug was filed on LLVM’s issue tracker, Phabricator, or the kernel mailing list.

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@nathanchance
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This warning appears with Fedora's PowerPC configuration:

$ curl -LSso .config https://src.fedoraproject.org/rpms/kernel/raw/rawhide/f/kernel-ppc64le-fedora.config

$ make -skj"$(nproc)" ARCH=powerpc LLVM=1 olddefconfig drivers/gpu/drm/amd/amdgpu/vcn_v5_0_0.o
drivers/gpu/drm/amd/amdgpu/vcn_v5_0_0.c:714:12: error: stack frame size (2272) exceeds limit (2048) in 'vcn_v5_0_0_start' [-Werror,-Wframe-larger-than]
  714 | static int vcn_v5_0_0_start(struct amdgpu_device *adev)
      |            ^
1 error generated.

I am reducing via cvise, this appears to be related to -fsanitize=bounds (via CONFIG_UBSAN_BOUNDS=y in Fedora's configuration), so this could be a code generation issue.
@nathanchance nathanchance added [ARCH] powerpc This bug impacts ARCH=powerpc -Wframe-larger-than= labels Jul 3, 2024
nathanchance added a commit to nathanchance/continuous-integration2 that referenced this issue Jul 3, 2024
@nathanchance
generator: yml: Disable CONFIG_DRM_WERROR for Fedora ppc64le config
2631022 
drm is not -Werror clean on this build, so turn it off until it can be
fixed or worked around in some other way.

Link: ClangBuiltLinux/linux#2036
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
@nathanchance
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I forgot to mention that I filed an issue for this upstream: llvm/llvm-project#98367

@nathanchance nathanchance added the Reported upstream This bug was filed on LLVM’s issue tracker, Phabricator, or the kernel mailing list. label Jul 25, 2024
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