commit aa7a574d0c54cc5a0aceb7357b5097342c0844ee
author Al Viro <viro@zeniv.linux.org.uk> Mon Sep 16 22:22:16 2013 -0400
committer Al Viro <viro@zeniv.linux.org.uk> Thu Oct 24 23:34:55 2013 -0400
tree ac1392238193e8cc51050681a18b72102fa1d950
parent 44bb4385ce1cfb231d37cbc7bb6faf70f98b7b17

dup_mnt_ns(): get rid of pointless grabbing of vfsmount_lock

mnt_list is protected by namespace_sem, not vfsmount_lock

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

fs/namespace.c

diff --git a/fs/namespace.c b/fs/namespace.c
index 0e54ad6..17ff147 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -2444,9 +2444,7 @@
 		return ERR_CAST(new);
 	}
 	new_ns->root = new;
-	br_write_lock(&vfsmount_lock);
 	list_add_tail(&new_ns->list, &new->mnt_list);
-	br_write_unlock(&vfsmount_lock);
 
 	/*
 	 * Second pass: switch the tsk->fs->* elements and mark new vfsmounts