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| author | Thomas Weißschuh <[email protected]> | 2025-08-21 07:56:44 +0000 |
|---|---|---|
| committer | Catalin Marinas <[email protected]> | 2025-09-03 11:07:23 +0000 |
| commit | 9a6d3ff10f7f538835cae4799562004ee46922c5 (patch) | |
| tree | 0c5d7895dfe33e4f99c9b4b4cad3f622bf2bd53a /drivers/gpu/drm/amd/amdgpu/atom.c | |
| parent | kselftest/arm64: Don't open code SVE_PT_SIZE() in fp-ptrace (diff) | |
| download | kernel-9a6d3ff10f7f538835cae4799562004ee46922c5.tar.gz kernel-9a6d3ff10f7f538835cae4799562004ee46922c5.zip | |
arm64: uapi: Provide correct __BITS_PER_LONG for the compat vDSO
The generic vDSO library uses the UAPI headers. On arm64 __BITS_PER_LONG is
always '64' even when used from the compat vDSO. In that case __GENMASK()
does an illegal bitshift, invoking undefined behaviour.
Change __BITS_PER_LONG to also work when used from the comapt vDSO.
To not confuse real userspace, only do this when building the kernel.
Reported-by: John Stultz <[email protected]>
Closes: https://lore.kernel.org/lkml/CANDhNCqvKOc9JgphQwr0eDyJiyG4oLFS9R8rSFvU0fpurrJFDg@mail.gmail.com/
Fixes: cd3557a7618b ("vdso/gettimeofday: Add support for auxiliary clocks")
Signed-off-by: Thomas Weißschuh <[email protected]>
Acked-by: Arnd Bergmann <[email protected]>
Tested-by: John Stultz <[email protected]>
Link: https://lore.kernel.org/r/20250821-vdso-arm64-compat-bitsperlong-v1-1-700bcabe7732@linutronix.de
Signed-off-by: Catalin Marinas <[email protected]>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/atom.c')
0 files changed, 0 insertions, 0 deletions