diff options
Diffstat (limited to 'arch/x86/include/asm/atomic64_64.h')
| -rw-r--r-- | arch/x86/include/asm/atomic64_64.h | 8 |
1 files changed, 2 insertions, 6 deletions
diff --git a/arch/x86/include/asm/atomic64_64.h b/arch/x86/include/asm/atomic64_64.h index 49fd1ea2295..0e1cbfc8ee0 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) @@ -202,7 +198,7 @@ static inline long atomic64_xchg(atomic64_t *v, long new) * @u: ...unless v is equal to u. * * Atomically adds @a to @v, so long as it was not @u. - * Returns non-zero if @v was not @u, and zero otherwise. + * Returns the old value of @v. */ static inline int atomic64_add_unless(atomic64_t *v, long a, long u) { |