linux-kernel - Re: [PATCH] Use correct byte-sized register constraint in __xchg

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Message-ID: <1333660563.8861.3.camel@localhost>
Date:	Thu, 05 Apr 2012 23:16:03 +0200
From:	Thomas Reitmayr <treitmayr@...base.at>
To:	Josh Boyer <jwboyer@...il.com>
Cc:	Jeremy Fitzhardinge <jeremy@...p.org>,
	the arch/x86 maintainers <x86@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	leigh123linux@...glemail.com, Dave Jones <davej@...hat.com>
Subject: Re: [PATCH] Use correct byte-sized register constraint in
 __xchg_op()

Hi Josh,
You are right, this bug also affects 3.3 and IMO should be fixed there,
too!
-Thomas

Am Donnerstag, den 05.04.2012, 16:27 -0400 schrieb Josh Boyer:
> On Tue, Apr 3, 2012 at 8:37 PM, Josh Boyer <jwboyer@...il.com> wrote:
> > On Mon, Apr 2, 2012 at 7:15 PM, Jeremy Fitzhardinge <jeremy@...p.org> wrote:
> >> x86-64 can access the low half of any register, but i386 can only do
> >> it with a subset of registers.  'r' causes compilation failures on i386,
> >> but 'q' expresses the constraint properly.
> >>
> >> Signed-off-by: Jeremy Fitzhardinge <jeremy@...p.org>
> >> Reported-by: Leigh Scott <leigh123linux@...glemail.com>
> >> Tested-by: Thomas Reitmayr <treitmayr@...base.at>
> >
> > This should be CC'd to stable, given the bug shows up in 3.3, right?
> 
> Er.. this patch seems to have been lost in limbo.  Is anyone following
> up on it?
> 
> josh
> 


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