diff --git a/include/linux/mutex-debug.h b/include/linux/mutex-debug.h
index 70a2609..2537285 100644
--- a/include/linux/mutex-debug.h
+++ b/include/linux/mutex-debug.h
@@ -2,6 +2,7 @@
 #define __LINUX_MUTEX_DEBUG_H
 
 #include <linux/linkage.h>
+#include <linux/lockdep.h>
 
 /*
  * Mutexes - debugging helpers:
@@ -10,7 +11,12 @@
 #define __DEBUG_MUTEX_INITIALIZER(lockname)				\
 	, .magic = &lockname
 
-#define mutex_init(sem)		__mutex_init(sem, __FILE__":"#sem)
+#define mutex_init(mutex)						\
+do {									\
+	static struct lock_class_key __key;				\
+									\
+	__mutex_init((mutex), #mutex, &__key);				\
+} while (0)
 
 extern void FASTCALL(mutex_destroy(struct mutex *lock));