From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sun, 29 Sep 2013 14:59:59 +0000 (-0400)
Subject: don't bother with vfsmount_lock in mounts_poll()
X-Git-Tag: v3.13-rc1~107^2~72
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=aab407fc5c0ce63e9fd4a34a790d7290d3e116a1;p=pandora-kernel.git

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>
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