From: gang.chen@asianux•com (Chen Gang)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH] ARM64: kernel: compiling issue, define cmpxchg64 and cmpxchg64_local for outside using.
Date: Mon, 22 Apr 2013 13:08:41 +0800 [thread overview]
Message-ID: <5174C5D9.3060109@asianux.com> (raw)
In-Reply-To: <2182812.ymprEm6XBb@wuerfel>
drivers use cmpxchg64, cmpxchg64_local ... to perform 64-bit operation,
so they can cross 32-bit and 64-bit platforms (it is a standard way).
Signed-off-by: Chen Gang <gang.chen@asianux•com>
---
arch/arm64/include/asm/cmpxchg.h | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/arch/arm64/include/asm/cmpxchg.h b/arch/arm64/include/asm/cmpxchg.h
index 968b5cb..8a8ce0e 100644
--- a/arch/arm64/include/asm/cmpxchg.h
+++ b/arch/arm64/include/asm/cmpxchg.h
@@ -170,4 +170,7 @@ static inline unsigned long __cmpxchg_mb(volatile void *ptr, unsigned long old,
(unsigned long)(n), \
sizeof(*(ptr))))
+#define cmpxchg64(ptr,o,n) cmpxchg((ptr),(o),(n))
+#define cmpxchg64_local(ptr,o,n) cmpxchg_local((ptr),(o),(n))
+
#endif /* __ASM_CMPXCHG_H */
--
1.7.7.6
next prev parent reply other threads:[~2013-04-22 5:08 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-19 11:45 [Suggestion] ARM64: kernel: compiling issue, need implement cmpxchg64 with assembler language Chen Gang
2013-04-19 12:12 ` Arnd Bergmann
2013-04-20 2:28 ` Chen Gang
2013-04-20 7:32 ` Arnd Bergmann
2013-04-22 5:08 ` Chen Gang
2013-04-22 5:08 ` Chen Gang [this message]
2013-04-23 10:48 ` [PATCH] ARM64: kernel: compiling issue, define cmpxchg64 and cmpxchg64_local for outside using Catalin Marinas
2013-04-23 10:54 ` Chen Gang
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