From 44e2aa937e698ea95dd86b2a4fabd734ef2c76db Mon Sep 17 00:00:00 2001
From: Dean Nelson <dnelson@redhat.com>
Date: Tue, 26 Oct 2010 14:22:08 -0700
Subject: [PATCH] mm/hugetlb.c: add missing spin_lock() to hugetlb_cow()

Add missing spin_lock() of the page_table_lock before an error return in
hugetlb_cow(). Callers of hugtelb_cow() expect it to be held upon return.

Signed-off-by: Dean Nelson <dnelson@redhat.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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