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| author | Arun Sharma <asharma@fb.com> | 2011-07-26 16:09:06 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-07-26 16:49:47 -0700 |
| commit | 60063497a95e716c9a689af3be2687d261f115b4 (patch) | |
| tree | 6ce0d68db76982c53df46aee5f29f944ebf2c320 /include/linux/atomic.h | |
| parent | 148817ba092f9f6edd35bad3c6c6b8e8f90fe2ed (diff) | |
| download | lwn-60063497a95e716c9a689af3be2687d261f115b4.tar.gz lwn-60063497a95e716c9a689af3be2687d261f115b4.zip | |
atomic: use <linux/atomic.h>
This allows us to move duplicated code in <asm/atomic.h>
(atomic_inc_not_zero() for now) to <linux/atomic.h>
Signed-off-by: Arun Sharma <asharma@fb.com>
Reviewed-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: David Miller <davem@davemloft.net>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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 bc6615d4132b..66fed6364122 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 |