linux-kernel - Re: [PATCH 0/2] x86: per-device dma_mapping

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Message-ID: <20080515220526.GH10434@il.ibm.com>
Date:	Fri, 16 May 2008 01:05:26 +0300
From:	Muli Ben-Yehuda <muli@...ibm.com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>,
	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	alexisb@...ibm.com
Subject: Re: [PATCH 0/2] x86: per-device dma_mapping_ops

On Fri, May 16, 2008 at 12:53:15AM +0300, Muli Ben-Yehuda wrote:
> On Thu, May 15, 2008 at 11:45:10PM +0200, Andi Kleen wrote:
> 
> > Even rare cases need to be handled.
> 
> Sure, but I'd rather we handle the common case first.

... which is not to say of course we can't do both, dev_archdata could
have a list of struct dma_mapping_ops instead of (or in addition to) a
struct dma_mapping_ops pointer. If space was at a premium we could
even multiplex both on the same pointer by using one of the low bits
to select between them.

Cheers,
Muli
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