From 74390aa5567827add5058a3b26eff0ed06a629ba Mon Sep 17 00:00:00 2001
From: Kaixu Xia <xiakaixu@huawei.com>
Date: Tue, 27 Jan 2015 17:55:12 +0800
Subject: [PATCH] perf: Remove the extra validity check on nr_pages

The function is_power_of_2() also do the check on nr_pages, so the first
check performed is unnecessary. On the other hand, the key point is to
ensure @nr_pages is a power-of-two number and mostly @nr_pages is a
nonzero value, so in the most cases, the function is_power_of_2() will
be called.

Signed-off-by: Kaixu Xia <xiakaixu@huawei.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Link: http://lkml.kernel.org/r/1422352512-75150-1-git-send-email-xiakaixu@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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