linux-kernel - Re: [PATCH] ARM: futex: fix clobbering oldval

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Message-ID: <20110923084348.GA5468@e102144-lin.cambridge.arm.com>
Date:	Fri, 23 Sep 2011 09:43:48 +0100
From:	Will Deacon <will.deacon@....com>
To:	mhban <mhban@...sung.com>
Cc:	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	DavidHowells <dhowells@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Michel Lespinasse <walken@...gle.com>,
	Russell King <linux@....linux.org.uk>,
	Chris Metcalf <cmetcalf@...era.com>
Subject: Re: [PATCH] ARM: futex: fix clobbering oldval

On Fri, Sep 23, 2011 at 01:18:49AM +0100, mhban wrote:
> On Thu, 2011-09-22 at 18:26 +0100, Will Deacon wrote:
> > 
> > It would have been nice to have been CC'd on this...
> 
> Will not miss next time. Thanks.

Thanks. You can use scripts/get_maintainer.pl to get a list of people to
email.

> > 
> > You shouldn't reference r5 directly here, but due to the way the futex code
> > is laid out, you can't add an extra output operand without converting the
> > code to use named arguments.
> > 
> > I'll post a patch to do that.
> > 
> > Will
> 
> I'm not familiar with gcc inline, thanks for pointing it out.

There's a good guide for ARM here:

http://www.ethernut.de/en/documents/arm-inline-asm.html

> BTW, my last name is Ban not Ben.

Oops, I'll update my reported-by to spell that correctly.

Cheers,

Will
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