From: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Date: Wed, 12 Dec 2012 21:52:33 +0000 (-0800)
Subject: mm/hugetlb.c: fix warning on freeing hwpoisoned hugepage
X-Git-Tag: omap-for-v3.8/fixes-for-merge-window-v4-signed~33^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=56f2fb147659e05b1e87b99791bf44b988d38545;p=pandora-kernel.git

mm/hugetlb.c: fix warning on freeing hwpoisoned hugepage

Fix the warning from __list_del_entry() which is triggered when a process
tries to do free_huge_page() for a hwpoisoned hugepage.

free_huge_page() can be called for hwpoisoned hugepage from
unpoison_memory().  This function gets refcount once and clears
PageHWPoison, and then puts refcount twice to return the hugepage back to
free pool.  The second put_page() finally reaches free_huge_page().

Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: Andi Kleen <andi.kleen@intel.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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