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authorWanpeng Li <liwanp@linux.vnet.ibm.com>2013-09-11 14:22:52 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-09-11 15:58:08 -0700
commitf9121153fdfbfaa930bf65077a5597e20d3ac608 (patch)
treea72e82c0c3394cf84b3ff8698134ff124a61b491 /include/linux
parent841fcc583f81c632d20a27e17beccb20320530a1 (diff)
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mm/hwpoison: don't need to hold compound lock for hugetlbfs page
compound lock is introduced by commit e9da73d67("thp: compound_lock."), it is used to serialize put_page against __split_huge_page_refcount(). In addition, transparent hugepages will be splitted in hwpoison handler and just one subpage will be poisoned. There is unnecessary to hold compound lock for hugetlbfs page. This patch replace compound_trans_order by compond_order in the place where the page is hugetlbfs page. Signed-off-by: Wanpeng Li <liwanp@linux.vnet.ibm.com> Reviewed-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Tony Luck <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/mm.h14
1 files changed, 0 insertions, 14 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 03f84b8d7359..caf543c7eaa7 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -495,20 +495,6 @@ static inline int compound_order(struct page *page)
return (unsigned long)page[1].lru.prev;
}
-static inline int compound_trans_order(struct page *page)
-{
- int order;
- unsigned long flags;
-
- if (!PageHead(page))
- return 0;
-
- flags = compound_lock_irqsave(page);
- order = compound_order(page);
- compound_unlock_irqrestore(page, flags);
- return order;
-}
-
static inline void set_compound_order(struct page *page, unsigned long order)
{
page[1].lru.prev = (void *)order;