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Date: Thu, 7 Mar 2013 17:21:20 +0900 From: Joonsoo Kim <iamjoonsoo.kim@....com> To: Andrew Morton <akpm@...ux-foundation.org> Cc: linux-kernel@...r.kernel.org, linux-mm@...ck.org, Joonsoo Kim <iamjoonsoo.kim@....com>, Hugh Dickins <hughd@...gle.com> Subject: [PATCH] mm: page_alloc: remove branch operation in free_pages_prepare() When we found that the flag has a bit of PAGE_FLAGS_CHECK_AT_PREP, we reset the flag. If we always reset the flag, we can reduce one branch operation. So remove it. Cc: Hugh Dickins <hughd@...gle.com> Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@....com> diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 8fcced7..778f2a9 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -614,8 +614,7 @@ static inline int free_pages_check(struct page *page) return 1; } page_nid_reset_last(page); - if (page->flags & PAGE_FLAGS_CHECK_AT_PREP) - page->flags &= ~PAGE_FLAGS_CHECK_AT_PREP; + page->flags &= ~PAGE_FLAGS_CHECK_AT_PREP; return 0; } -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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