diff --git a/include/linux/mutex.h b/include/linux/mutex.h
index 153274f..f25c134 100644
--- a/include/linux/mutex.h
+++ b/include/linux/mutex.h
@@ -138,9 +138,9 @@ extern void __mutex_init(struct mutex *lock, const char *name,
  * mutex_is_locked - is the mutex locked
  * @lock: the mutex to be queried
  *
- * Returns 1 if the mutex is locked, 0 if unlocked.
+ * Returns true if the mutex is locked, false if unlocked.
  */
-static inline int mutex_is_locked(struct mutex *lock)
+static inline bool mutex_is_locked(struct mutex *lock)
 {
 	/*
 	 * XXX think about spin_is_locked