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| author | Uros Bizjak <ubizjak@gmail.com> | 2023-04-05 16:17:09 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2023-04-29 09:09:23 +0200 |
| commit | 5cd4c268412f802e71b7722c3ec4638b0fe04acd (patch) | |
| tree | 30cfc20a6f6e398f92e75ad88be217efbc9d1255 /arch/x86 | |
| parent | d994f2c8e2410ebcb928df67baa6f04e29bc9d3e (diff) | |
| download | lwn-5cd4c268412f802e71b7722c3ec4638b0fe04acd.tar.gz lwn-5cd4c268412f802e71b7722c3ec4638b0fe04acd.zip | |
locking/x86: Define arch_try_cmpxchg_local()
Define target specific arch_try_cmpxchg_local(). This
definition overrides the generic arch_try_cmpxchg_local()
fallback definition and enables target-specific
implementation of try_cmpxchg_local().
Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20230405141710.3551-5-ubizjak@gmail.com
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/include/asm/cmpxchg.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86/include/asm/cmpxchg.h b/arch/x86/include/asm/cmpxchg.h index 94fbe6ae7431..540573f515b7 100644 --- a/arch/x86/include/asm/cmpxchg.h +++ b/arch/x86/include/asm/cmpxchg.h @@ -221,9 +221,15 @@ extern void __add_wrong_size(void) #define __try_cmpxchg(ptr, pold, new, size) \ __raw_try_cmpxchg((ptr), (pold), (new), (size), LOCK_PREFIX) +#define __try_cmpxchg_local(ptr, pold, new, size) \ + __raw_try_cmpxchg((ptr), (pold), (new), (size), "") + #define arch_try_cmpxchg(ptr, pold, new) \ __try_cmpxchg((ptr), (pold), (new), sizeof(*(ptr))) +#define arch_try_cmpxchg_local(ptr, pold, new) \ + __try_cmpxchg_local((ptr), (pold), (new), sizeof(*(ptr))) + /* * xadd() adds "inc" to "*ptr" and atomically returns the previous * value of "*ptr". |