tree a410c7c9c5a58643da7b4c2abdb7796d1255f048
parent 6568d4a9c9ff16d6c4f0b14dfea567806ce579e4
author Hillf Danton <dhillf@gmail.com> 1327098853 -0800
committer Linus Torvalds <torvalds@linux-foundation.org> 1327336728 -0800

mm/hugetlb.c: undo change to page mapcount in fault handler

Page mapcount should be updated only if we are sure that the page ends
up in the page table otherwise we would leak if we couldn't COW due to
reservations or if idx is out of bounds.

Signed-off-by: Hillf Danton <dhillf@gmail.com>
Reviewed-by: Michal Hocko <mhocko@suse.cz>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>