Thomas Weißschuh 9a6d3ff10f 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 <jstultz@google.com> Closes: https://lore.kernel.org/lkml/CANDhNCqvKOc9JgphQwr0eDyJiyG4oLFS9R8rSFvU0fpurrJFDg@mail.gmail.com/ Fixes: cd3557a761 ("vdso/gettimeofday: Add support for auxiliary clocks") Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de> Acked-by: Arnd Bergmann <arnd@arndb.de> Tested-by: John Stultz <jstultz@google.com> Link: https://lore.kernel.org/r/20250821-vdso-arm64-compat-bitsperlong-v1-1-700bcabe7732@linutronix.de Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>		2025-09-03 12:07:23 +01:00
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asm	arm64: uapi: Provide correct __BITS_PER_LONG for the compat vDSO	2025-09-03 12:07:23 +01:00