From a850ea30374ebed32a0724742601861853fde869 Mon Sep 17 00:00:00 2001
From: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Date: Fri, 10 Sep 2010 13:23:06 +0900
Subject: [PATCH] hugetlb, rmap: add BUG_ON(!PageLocked) in
 hugetlb_add_anon_rmap()

Confirming page lock is held in hugetlb_add_anon_rmap() may be useful
to detect possible future problems.

Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Acked-by: Rik van Riel <riel@redhat.com>
Acked-by: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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