From: Li Zefan <lizf@cn.fujitsu.com>
Date: Thu, 12 Mar 2009 01:23:01 +0000 (+0800)
Subject: cpuacct: reduce one NULL check in fast-path
X-Git-Tag: v2.6.30-rc1~211^2~21^2~2^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7a46c594bf7f1f2eeb1e12d4b857d5f581957a92;p=pandora-kernel.git

cpuacct: reduce one NULL check in fast-path

Impact: micro-optimization

In cpuacct_charge(), task_ca() will never return NULL, so change
for(...) to do { } while(...) to save one NULL check.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Menage <menage@google.com>
Cc: Balbir Singh <balbir@linux.vnet.ibm.com>
Cc: Bharata B Rao <bharata@linux.vnet.ibm.com>
LKML-Reference: <49B863F5.2060400@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

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