Linux patch 3.12.21

git-svn-id: svn://anonsvn.gentoo.org/linux-patches@2804 00c4350b-4cf9-0310-8c1b-f3fed11d2be3
3.12-22 release

git-svn-id: svn://anonsvn.gentoo.org/linux-patches@2805 00c4350b-4cf9-0310-8c1b-f3fed11d2be3