tree 2b879c67ee72c97696dc4611b59b959695e80c4d
parent 4f32be677b124a49459e2603321c7a5605ceb9f8
author Wanpeng Li <wanpeng.li@hotmail.com> 1439591699 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1439592992 -0700

mm/hwpoison: fix fail isolate hugetlbfs page w/ refcount held

Hugetlbfs pages will get a refcount in get_any_page() or
madvise_hwpoison() if soft offlining through madvise.  The refcount which
is held by the soft offline path should be released if we fail to isolate
hugetlbfs pages.

Fix it by reducing the refcount for both isolation success and failure.

Signed-off-by: Wanpeng Li <wanpeng.li@hotmail.com>
Acked-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: <stable@vger.kernel.org>	[3.9+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>