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| author | Peter Zijlstra <peterz@infradead.org> | 2023-05-31 16:08:36 +0300 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2023-06-05 10:36:35 +0300 |
| commit | b23e139d0b66c0216e7e9361a5021290395f504c (patch) | |
| tree | 0f4d5c909eab20ea594dda67675d6233923efcf3 /arch/x86/include/asm/cmpxchg_32.h | |
| parent | 224d80c584d3016cb8d83d1c33914fdd3508aa8c (diff) | |
| download | linux-b23e139d0b66c0216e7e9361a5021290395f504c.tar.xz | |
arch: Introduce arch_{,try_}_cmpxchg128{,_local}()
For all architectures that currently support cmpxchg_double()
implement the cmpxchg128() family of functions that is basically the
same but with a saner interface.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/20230531132323.452120708@infradead.org
Diffstat (limited to 'arch/x86/include/asm/cmpxchg_32.h')
| -rw-r--r-- | arch/x86/include/asm/cmpxchg_32.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/include/asm/cmpxchg_32.h b/arch/x86/include/asm/cmpxchg_32.h index 6ba80ce9438d..d12f9ed2e63a 100644 --- a/arch/x86/include/asm/cmpxchg_32.h +++ b/arch/x86/include/asm/cmpxchg_32.h @@ -103,6 +103,7 @@ static inline bool __try_cmpxchg64(volatile u64 *ptr, u64 *pold, u64 new) #endif -#define system_has_cmpxchg_double() boot_cpu_has(X86_FEATURE_CX8) +#define system_has_cmpxchg_double() boot_cpu_has(X86_FEATURE_CX8) +#define system_has_cmpxchg64() boot_cpu_has(X86_FEATURE_CX8) #endif /* _ASM_X86_CMPXCHG_32_H */ |