mm-move-all-mmu-notifier-invocations-to-be-done-outside-the-pt-lock-fix

mm-move-all-mmu-notifier-invocations-to-be-done-outside-the-pt-lock-fix

possible speed tweak in hugetlb_cow(), cleanups

Cc: Andrea Arcangeli <andrea@qumranet.com>
Cc: Avi Kivity <avi@redhat.com>
Cc: Christoph Lameter <cl@linux-foundation.org>
Cc: Haggai Eran <haggaie@mellanox.com>
Cc: Liran Liss <liranl@mellanox.com>
Cc: Or Gerlitz <ogerlitz@mellanox.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Sagi Grimberg <sagig@mellanox.com>
Cc: Shachar Raindel <raindel@mellanox.com>
Cc: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>