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