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authorZhang Yanfei <zhangyanfei@cn.fujitsu.com>2013-07-09 03:00:08 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2013-07-09 21:33:22 +0400
commit345606d42971fc4ed164fbabac118708d51b8e0a (patch)
tree23bd3d638b69536f11360866013cc462e5788043 /drivers/sh
parentb21fbccd4b8aba805cbc231998ec7bf83616a79e (diff)
downloadlinux-345606d42971fc4ed164fbabac118708d51b8e0a.tar.xz
mm/page_alloc.c: remove unlikely() from the current_order test
In __rmqueue_fallback(), current_order loops down from MAX_ORDER - 1 to the order passed. MAX_ORDER is typically 11 and pageblock_order is typically 9 on x86. Integer division truncates, so pageblock_order / 2 is 4. For the first eight iterations, it's guaranteed that current_order >= pageblock_order / 2 if it even gets that far! So just remove the unlikely(), it's completely bogus. Signed-off-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com> Suggested-by: David Rientjes <rientjes@google.com> Acked-by: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/sh')
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