diff --git a/kernel/mutex.c b/kernel/mutex.c
index d3dcb8b..5c25618 100644
--- a/kernel/mutex.c
+++ b/kernel/mutex.c
@@ -81,6 +81,7 @@
  */
 void fastcall __sched mutex_lock(struct mutex *lock)
 {
+	might_sleep();
 	/*
 	 * The locking fastpath is the 1->0 transition from
 	 * 'unlocked' into 'locked' state.
@@ -253,6 +254,7 @@
  */
 int fastcall __sched mutex_lock_interruptible(struct mutex *lock)
 {
+	might_sleep();
 	return __mutex_fastpath_lock_retval
 			(&lock->count, __mutex_lock_interruptible_slowpath);
 }