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Subject: [tip: locking/core] locking/x86: Define arch_try_cmpxchg_local()
Cc: Uros Bizjak <ubizjak@gmail.com>,
"Peter Zijlstra (Intel)" <peterz@infradead.org>,
Ingo Molnar <mingo@kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>, x86@kernel.org,
linux-kernel@vger.kernel.org
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[tip:,locking/core] locking/x86: Define arch_try_cmpxchg_local()
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Commit Message
tip-bot2 for Thomas Gleixner
April 29, 2023, 7:03 a.m. UTC
The following commit has been merged into the locking/core branch of tip: Commit-ID: 1ab70804ef3f829c5a738cba8627f0a0c2486d2b Gitweb: https://git.kernel.org/tip/1ab70804ef3f829c5a738cba8627f0a0c2486d2b Author: Uros Bizjak <ubizjak@gmail.com> AuthorDate: Wed, 05 Apr 2023 16:17:09 +02:00 Committer: Ingo Molnar <mingo@kernel.org> CommitterDate: Sat, 29 Apr 2023 08:52:44 +02:00 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> --- arch/x86/include/asm/cmpxchg.h | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/arch/x86/include/asm/cmpxchg.h b/arch/x86/include/asm/cmpxchg.h index 94fbe6a..540573f 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".