diff options
| author | Jeremy Fitzhardinge | 2011-08-24 01:59:58 +0200 |
|---|---|---|
| committer | H. Peter Anvin | 2011-08-29 22:44:12 +0200 |
| commit | 8b8bc2f7311c3223213dbe346d9cc2e299fdb5eb (patch) | |
| tree | 50a2f0faa3762084336be4f97c03a97b14b22262 /arch/x86/include/asm/atomic64_64.h | |
| parent | x86: Add xadd helper macro (diff) | |
| download | kernel-qcow2-linux-8b8bc2f7311c3223213dbe346d9cc2e299fdb5eb.tar.gz kernel-qcow2-linux-8b8bc2f7311c3223213dbe346d9cc2e299fdb5eb.tar.xz kernel-qcow2-linux-8b8bc2f7311c3223213dbe346d9cc2e299fdb5eb.zip | |
x86: Use xadd helper more widely
This covers the trivial cases from open-coded xadd to the xadd macros.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Link: http://lkml.kernel.org/r/4E5BCC40.3030501@goop.org
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch/x86/include/asm/atomic64_64.h')
| -rw-r--r-- | arch/x86/include/asm/atomic64_64.h | 6 |
1 files changed, 1 insertions, 5 deletions
diff --git a/arch/x86/include/asm/atomic64_64.h b/arch/x86/include/asm/atomic64_64.h index 017594d403f6..0e1cbfc8ee06 100644 --- a/arch/x86/include/asm/atomic64_64.h +++ b/arch/x86/include/asm/atomic64_64.h @@ -170,11 +170,7 @@ static inline int atomic64_add_negative(long i, atomic64_t *v) */ static inline long atomic64_add_return(long i, atomic64_t *v) { - long __i = i; - asm volatile(LOCK_PREFIX "xaddq %0, %1;" - : "+r" (i), "+m" (v->counter) - : : "memory"); - return i + __i; + return i + xadd(&v->counter, i); } static inline long atomic64_sub_return(long i, atomic64_t *v) |