diff options
Diffstat (limited to 'include/linux/atomic.h')
| -rw-r--r-- | include/linux/atomic.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/atomic.h b/include/linux/atomic.h index bc6615d4132..66fed636412 100644 --- a/include/linux/atomic.h +++ b/include/linux/atomic.h @@ -3,6 +3,15 @@ #include <asm/atomic.h> /** + * atomic_inc_not_zero - increment unless the number is zero + * @v: pointer of type atomic_t + * + * Atomically increments @v by 1, so long as @v is non-zero. + * Returns non-zero if @v was non-zero, and zero otherwise. + */ +#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0) + +/** * atomic_inc_not_zero_hint - increment if not null * @v: pointer of type atomic_t * @hint: probable value of the atomic before the increment |