tree 8ac53d05b88c74f6749461f31b4ee97a8e832ed4
parent aba809cf0944fdc5a83ef8b5864cdce2a99b2513
author Al Viro <viro@zeniv.linux.org.uk> 1380466799 -0400
committer Al Viro <viro@zeniv.linux.org.uk> 1382672099 -0400

don't bother with vfsmount_lock in mounts_poll()

wake_up_interruptible/poll_wait provide sufficient barriers;
just use ACCESS_ONCE() to fetch ns->event and that's it.

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