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x86: Use xadd helper more widely

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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>
This commit is contained in:
Jeremy Fitzhardinge
2011-08-23 16:59:58 -07:00
committed by H. Peter Anvin
parent 433b352061
commit 8b8bc2f731
4 changed files with 5 additions and 23 deletions
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6
arch/x86/include/asm/atomic64_64.h
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@@ -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)