put_mnt_ns(): use drop_collected_mounts()

... rather than open-coding it

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 1 insertions, 5 deletions

diff --git a/fs/namespace.c b/fs/namespace.c
index da5c49483430..5918fc31a636 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -2802,11 +2802,7 @@ void put_mnt_ns(struct mnt_namespace *ns)
 {
         if (!atomic_dec_and_test(&ns->count))
                 return;
-        namespace_lock();
-        br_write_lock(&vfsmount_lock);
-        umount_tree(ns->root, 0);
-        br_write_unlock(&vfsmount_lock);
-        namespace_unlock();
+        drop_collected_mounts(&ns->root->mnt);
         free_mnt_ns(ns);
 }