From: Joonsoo Kim <iamjoonsoo.kim@lge.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Joonsoo Kim <iamjoonsoo.kim@lge.com>,
Hugh Dickins <hughd@google.com>
Subject: [PATCH] mm: page_alloc: remove branch operation in free_pages_prepare()
Date: Thu, 7 Mar 2013 17:21:20 +0900 [thread overview]
Message-ID: <1362644480-18381-1-git-send-email-iamjoonsoo.kim@lge.com> (raw)
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@google.com>
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.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
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next reply other threads:[~2013-03-07 8:21 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-07 8:21 Joonsoo Kim [this message]
2013-03-07 18:54 ` Hugh Dickins
2013-03-08 0:45 ` Joonsoo Kim
2013-03-08 2:01 ` Hugh Dickins
2013-03-09 3:54 ` Will Huck
2013-03-13 8:08 ` Joonsoo Kim
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