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

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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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This commit is contained in:

Naoya Horiguchi 2010-07-02 14:47:20 +09:00 • committed by Andi Kleen

parent e3390f67a7

commit 28957a5467

1 changed files with 3 additions and 1 deletions

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mm/hugetlb.c

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