linux-kernel - Re: [PATCH 00 of 10] x86: unify asm/pgtable.h

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Message-ID: <20080109012042.GA1133@elte.hu>
Date:	Wed, 9 Jan 2008 02:20:42 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Andi Kleen <ak@...e.de>
Cc:	Jeremy Fitzhardinge <jeremy@...p.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Glauber de Oliveira Costa <glommer@...il.com>,
	Jan Beulich <jbeulich@...ell.com>
Subject: Re: [PATCH 00 of 10] x86: unify asm/pgtable.h


* Andi Kleen <ak@...e.de> wrote:

> >> this code is plain buggy but fixing it triggered driver bugs in the 
> >> past so we've been procrastinating it forever ...
> >>   
> >
> > What kind of driver bugs?  Do drivers manage to get into the other 
> > branch
> 
> That was just the return value issue that caused drivers to fail 
> through ioremap() iirc. It would error out for unmapped holes and then 
> fail ioremap I don't think it's related.

in -mm we had a patch where the error behavior was consolidated but it 
broke on some boxes.

	Ingo
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