From: Luca Barbieri <luca@luca-barbieri.com>
To: hpa@zytor.com
Cc: mingo@elte.hu, a.p.zijlstra@chello.nl, akpm@linux-foundation.org,
linux-kernel@vger.kernel.org,
Luca Barbieri <luca@luca-barbieri.com>
Subject: [PATCH 2/4] x86-32: allow UP/SMP lock replacement in cmpxchg64 (v2)
Date: Wed, 24 Feb 2010 10:54:23 +0100 [thread overview]
Message-ID: <1267005265-27958-3-git-send-email-luca@luca-barbieri.com> (raw)
In-Reply-To: <1267005265-27958-1-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:[~2010-02-24 9:54 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-24 9:54 [PATCH 0/4] x86-32: improve atomic64_t functions (v3, for tip/x86/asm) Luca Barbieri
2010-02-24 9:54 ` [PATCH 1/4] x86: add support for lock prefix in alternatives (v2) Luca Barbieri
2010-02-26 5:12 ` [tip:x86/atomic] x86: Add support for lock prefix in alternatives tip-bot for Luca Barbieri
2010-04-29 23:24 ` [tip:x86/atomic] x86: Fix LOCK_PREFIX_HERE for uniprocessor build tip-bot for H. Peter Anvin
2010-02-24 9:54 ` Luca Barbieri [this message]
2010-02-26 5:12 ` [tip:x86/atomic] x86-32: Allow UP/SMP lock replacement in cmpxchg64 tip-bot for Luca Barbieri
2010-02-24 9:54 ` [PATCH 3/4] lib: add self-test for atomic64_t Luca Barbieri
2010-02-26 5:13 ` [tip:x86/atomic] lib: Add " tip-bot for Luca Barbieri
2010-03-01 19:59 ` [tip:x86/atomic] x86, atomic64: In selftest, distinguish x86-64 from 586+ tip-bot for H. Peter Anvin
2010-02-24 9:54 ` [PATCH 4/4] x86-32: rewrite 32-bit atomic64 functions in assembly (v3) Luca Barbieri
2010-02-26 5:13 ` [tip:x86/atomic] x86-32: Rewrite 32-bit atomic64 functions in assembly tip-bot for Luca Barbieri
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