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>
This commit is contained in:
Al Viro 2013-09-16 22:22:16 -04:00
commit aa7a574d0c