From 09761333ed47e899cc1482c13090b95f3f711971 Mon Sep 17 00:00:00 2001
From: Hillf Danton <dhillf@gmail.com>
Date: Thu, 8 Dec 2011 14:34:20 -0800
Subject: [PATCH] mm/migrate.c: pair unlock_page() and lock_page() when
 migrating huge pages

Avoid unlocking and unlocked page if we failed to lock it.

Signed-off-by: Hillf Danton <dhillf@gmail.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Reading git-format-patch failed