diff --git a/fs/namespace.c b/fs/namespace.c
index e0e0f9cf6c30d..74f64294a4108 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -1794,7 +1794,7 @@ void drop_collected_mounts(struct vfsmount *mnt)
 {
 	namespace_lock();
 	lock_mount_hash();
-	umount_tree(real_mount(mnt), UMOUNT_SYNC);
+	umount_tree(real_mount(mnt), 0);
 	unlock_mount_hash();
 	namespace_unlock();
 }