linux-kernel - Re: [PATCH] x86: create array based interface to change page attribute

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Message-ID: <47FA8A69.6080402@linux.intel.com>
Date:	Mon, 07 Apr 2008 13:56:09 -0700
From:	Arjan van de Ven <arjan@...ux.intel.com>
To:	Jesse Barnes <jbarnes@...tuousgeek.org>
CC:	Thomas Hellström <thomas@...gstengraphics.com>,
	Andi Kleen <andi@...stfloor.org>,
	Dave Airlie <airlied@...hat.com>, linux-kernel@...r.kernel.org,
	tglx@...utronix.de, mingo@...hat.com
Subject: Re: [PATCH] x86: create array based interface to change page attribute

Jesse Barnes wrote:
> 
> Yeah, they're ioremapped now, but that's a problem since with the PAT patches 
> they'll be mapped hard UC (right now it just happens to work).
> 
clearly this needs to use ioremap_wc(), I was assuming nothing else....
(code mapping things uncached and then frobbing the MTRR's underneath really shouldn't
be allowed to live from 2.6.26 and forward. Esp for the 3D drivers we KNOW that we
want _wc so that is a clear case of just fixing the code to do the right thing)
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