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-rw-r--r--include/linux/mutex.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/mutex.h b/include/linux/mutex.h
index 3069ec7..878cab4 100644
--- a/include/linux/mutex.h
+++ b/include/linux/mutex.h
@@ -150,5 +150,6 @@ extern int __must_check mutex_lock_killable(struct mutex *lock);
*/
extern int mutex_trylock(struct mutex *lock);
extern void mutex_unlock(struct mutex *lock);
+extern int atomic_dec_and_mutex_lock(atomic_t *cnt, struct mutex *lock);
#endif
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