From: Luca Barbieri <luca@luca-barbieri.com>
To: mingo@elte.hu
Cc: hpa@zytor.com, a.p.zijlstra@chello.nl, akpm@linux-foundation.org,
linux-kernel@vger.kernel.org,
Luca Barbieri <luca@luca-barbieri.com>
Subject: [PATCH 3/5] x86-32: allow UP/SMP lock replacement in cmpxchg64 (v2)
Date: Fri, 19 Feb 2010 18:26:42 +0100 [thread overview]
Message-ID: <1266600404-16402-4-git-send-email-luca@luca-barbieri.com> (raw)
In-Reply-To: <1266600404-16402-1-git-send-email-luca@luca-barbieri.com>
Changes in v2:
- Naming change
Use the functionality just introduced in the previous patch.
Signed-off-by: Luca Barbieri <luca@luca-barbieri.com>
---
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 ffb9bb6..8859e12 100644
--- a/arch/x86/include/asm/cmpxchg_32.h
+++ b/arch/x86/include/asm/cmpxchg_32.h
@@ -271,7 +271,8 @@ extern unsigned long long cmpxchg_486_u64(volatile void *, u64, u64);
__typeof__(*(ptr)) __ret; \
__typeof__(*(ptr)) __old = (o); \
__typeof__(*(ptr)) __new = (n); \
- alternative_io("call cmpxchg8b_emu", \
+ alternative_io(LOCK_PREFIX_HERE \
+ "call cmpxchg8b_emu", \
"lock; cmpxchg8b (%%esi)" , \
X86_FEATURE_CX8, \
"=A" (__ret), \
--
1.6.6.1.476.g01ddb
next prev parent reply other threads:[~2010-02-19 17:27 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-19 17:26 [PATCH 0/5] x86-32: improve atomic64_t functions (v2) Luca Barbieri
2010-02-19 17:26 ` [PATCH 1/5] x86: add support for relative CALL and JMP in alternatives (v2) Luca Barbieri
2010-02-19 17:26 ` [PATCH 2/5] x86: add support for lock prefix " Luca Barbieri
2010-02-19 17:26 ` Luca Barbieri [this message]
2010-02-19 17:26 ` [PATCH 4/5] lib: add self-test for atomic64_t Luca Barbieri
2010-02-19 17:26 ` [PATCH 5/5] x86-32: rewrite 32-bit atomic64 functions in assembly (v2) Luca Barbieri
2010-02-23 22:47 ` [PATCH 0/5] x86-32: improve atomic64_t functions (v2) H. Peter Anvin
2010-02-24 9:56 ` Luca Barbieri
2010-02-26 10:14 ` Ingo Molnar
2010-02-26 11:08 ` Luca Barbieri
2010-02-26 11:23 ` Luca Barbieri
2010-03-01 7:35 ` H. Peter Anvin
2010-03-01 8:49 ` Paul Mackerras
2010-03-01 17:16 ` Luca Barbieri
2010-03-01 17:31 ` Luca Barbieri
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