Messages in this thread Patch in this message | | | From | Jeremy Fitzhardinge <> | Subject | [PATCH 17/18] x86: add local and sync variants of xadd | Date | Wed, 24 Aug 2011 10:53:11 -0700 |
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From: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> --- arch/x86/include/asm/cmpxchg.h | 14 +++++++++----- 1 files changed, 9 insertions(+), 5 deletions(-)
diff --git a/arch/x86/include/asm/cmpxchg.h b/arch/x86/include/asm/cmpxchg.h index c99ce79..992ac80 100644 --- a/arch/x86/include/asm/cmpxchg.h +++ b/arch/x86/include/asm/cmpxchg.h @@ -193,26 +193,26 @@ extern void __xadd_wrong_size(void); __cmpxchg_local_flag((ptr), (old), (new), sizeof(*ptr)) #endif -#define xadd(ptr, inc) \ +#define __xadd(ptr, inc, lock) \ do { \ switch (sizeof(*(ptr))) { \ case __X86_CASE_B: \ - asm volatile (LOCK_PREFIX "xaddb %b0, %1\n" \ + asm volatile (lock "xaddb %b0, %1\n" \ : "+r" (inc), "+m" (*(ptr)) \ : : "memory", "cc"); \ break; \ case __X86_CASE_W: \ - asm volatile (LOCK_PREFIX "xaddw %w0, %1\n" \ + asm volatile (lock "xaddw %w0, %1\n" \ : "+r" (inc), "+m" (*(ptr)) \ : : "memory", "cc"); \ break; \ case __X86_CASE_L: \ - asm volatile (LOCK_PREFIX "xaddl %0, %1\n" \ + asm volatile (lock "xaddl %0, %1\n" \ : "+r" (inc), "+m" (*(ptr)) \ : : "memory", "cc"); \ break; \ case __X86_CASE_Q: \ - asm volatile (LOCK_PREFIX "xaddq %q0, %1\n" \ + asm volatile (lock "xaddq %q0, %1\n" \ : "+r" (inc), "+m" (*(ptr)) \ : : "memory", "cc"); \ break; \ @@ -221,4 +221,8 @@ extern void __xadd_wrong_size(void); } \ } while(0) +#define xadd(ptr, inc) __xadd((ptr), (inc), LOCK_PREFIX) +#define xadd_sync(ptr, inc) __xadd((ptr), (inc), "lock; ") +#define xadd_local(ptr, inc) __xadd((ptr), (inc), "") + #endif /* ASM_X86_CMPXCHG_H */ -- 1.7.6
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