From: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Date: Fri, 2 Jul 2010 05:47:20 +0000 (+0900)
Subject: hugetlb: add missing unlock in avoidcopy path in hugetlb_cow()
X-Git-Tag: v2.6.36-rc1~52^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=28957a5467bab9ed51a237d21e31055fad987887;p=pandora-kernel.git

hugetlb: add missing unlock in avoidcopy path in hugetlb_cow()

This patch fixes possible deadlock in hugepage lock_page()
by adding missing unlock_page().

libhugetlbfs test will hit this bug when the next patch in this
patchset ("hugetlb, HWPOISON: move PG_HWPoison bit check") is applied.

Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com>
Acked-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
---

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