diff options
| author | Wanpeng Li <liwanp@linux.vnet.ibm.com> | 2013-09-11 14:22:52 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-11 15:58:08 -0700 |
| commit | f9121153fdfbfaa930bf65077a5597e20d3ac608 (patch) | |
| tree | a72e82c0c3394cf84b3ff8698134ff124a61b491 /include/linux | |
| parent | 841fcc583f81c632d20a27e17beccb20320530a1 (diff) | |
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.h | 14 |
1 files changed, 0 insertions, 14 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index 03f84b8d735..caf543c7eaa 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; |