linux-kernel - Re: [PATCH v7 4/8] sched: nominate preferred wakeup cpu

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Message-Id: <20081219204455.5f954823.akpm@linux-foundation.org>
Date:	Fri, 19 Dec 2008 20:44:55 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	svaidy@...ux.vnet.ibm.com
Cc:	linux-kernel@...r.kernel.org, suresh.b.siddha@...el.com,
	venkatesh.pallipadi@...el.com, a.p.zijlstra@...llo.nl,
	mingo@...e.hu, dipankar@...ibm.com, balbir@...ux.vnet.ibm.com,
	vatsa@...ux.vnet.ibm.com, ego@...ibm.com, andi@...stfloor.org,
	davecb@....com, tconnors@...ro.swin.edu.au, maxk@...lcomm.com,
	gregory.haskins@...il.com, pavel@...e.cz,
	Rusty Russell <rusty@...tcorp.com.au>
Subject: Re: [PATCH v7 4/8] sched: nominate preferred wakeup cpu

On Sat, 20 Dec 2008 10:06:38 +0530 Vaidyanathan Srinivasan <svaidy@...ux.vnet.ibm.com> wrote:

> > 
> > kernel/sched.c: In function 'schedule':
> > kernel/sched.c:3679: warning: 'active_balance' may be used uninitialized in this function
> > 
> > This warning is correct - the code is buggy.
> 
> Yes this is my code bug.  I did not see the warning in sched.c.  Is
> there any build option that I need to pass in order to get -Wall
> effect?

That was just with plain old kbuild: `make allmodconfig;make'.

That warning was produced by gcc-4.0.2.  If you're using something more
recent then gcc has regressed.
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