From: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
Date: Mon, 8 Jul 2013 23:00:08 +0000 (-0700)
Subject: mm/page_alloc.c: remove unlikely() from the current_order test
X-Git-Tag: v3.11-rc1~67^2~88
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=345606d42971fc4ed164fbabac118708d51b8e0a;p=pandora-kernel.git

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>
---

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