From: Hillf Danton <dhillf@gmail.com>
Date: Wed, 21 Mar 2012 23:34:03 +0000 (-0700)
Subject: mm: hugetlb: bail out unmapping after serving reference page
X-Git-Tag: v3.4-rc1~158^2~52
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9e81130b7ce23050335b1197bb51743517b5b9d0;p=pandora-kernel.git

mm: hugetlb: bail out unmapping after serving reference page

When unmapping a given VM range, we could bail out if a reference page is
supplied and is unmapped, which is a minor optimization.

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

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