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-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 bc6615d..66fed63 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
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