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authorArun Sharma <asharma@fb.com>2011-07-27 03:09:06 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2011-07-27 03:49:47 +0400
commit60063497a95e716c9a689af3be2687d261f115b4 (patch)
tree6ce0d68db76982c53df46aee5f29f944ebf2c320 /include/linux/atomic.h
parent148817ba092f9f6edd35bad3c6c6b8e8f90fe2ed (diff)
downloadlinux-60063497a95e716c9a689af3be2687d261f115b4.tar.xz
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.h9
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