diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 45d0ada..7f43fde 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -2645,6 +2645,7 @@
 	sb->dq_op = &ext4_quota_operations;
 #endif
 	INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */
+	mutex_init(&sbi->s_orphan_lock);
 
 	sb->s_root = NULL;