linux-kernel - Re: [PATCH 3/7] percpu: clean up percpu variable definitions

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Date:	Tue, 02 Jun 2009 15:08:56 +1000
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Tejun Heo <tj@...nel.org>
Cc:	David Miller <davem@...emloft.net>, JBeulich@...ell.com,
	andi@...stfloor.org, mingo@...e.hu, hpa@...or.com,
	tglx@...utronix.de, linux-kernel@...r.kernel.org, x86@...nel.org,
	ink@...assic.park.msu.ru, rth@...ddle.net, linux@....linux.org.uk,
	hskinnemoen@...el.com, cooloney@...nel.org, starvik@...s.com,
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	rusty@...tcorp.com.au, jens.axboe@...cle.com, davej@...hat.com,
	jeremy@...source.com, linux-mm@...ck.org
Subject: Re: [PATCH 3/7] percpu: clean up percpu variable definitions

On Mon, 2009-06-01 at 20:36 +0900, Tejun Heo wrote:
> > Whether the volatile is actually needed or not, it's bad to have this
> > kind of potential behavior changing nugget hidden in this seemingly
> > inocuous change.  Especially if you're the poor soul who ends up
> > having to debug it :-/
> 
> You're right.  Aieee... how do I feed volatile to the DEFINE macro.
> I'll think of something.

Or better, work with the cris maintainer to figure out whether it's
needed (it probably isn't) and have a pre-requisite patch that removes
it before your series :-)

Cheers,
Ben.


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