linux-kernel - Re: [PATCH] sparc: use asm-generic/scatterlist.h

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Message-Id: <20100302224858G.fujita.tomonori@lab.ntt.co.jp>
Date:	Tue, 2 Mar 2010 22:49:20 +0900
From:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
To:	arnd@...db.de
Cc:	fujita.tomonori@....ntt.co.jp, davem@...emloft.net,
	sparclinux@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] sparc: use asm-generic/scatterlist.h

On Tue, 2 Mar 2010 14:38:31 +0100
Arnd Bergmann <arnd@...db.de> wrote:

> On Tuesday 02 March 2010, FUJITA Tomonori wrote:
> > Yeah, but IIRC, Alpha, x86_64 GART, parisc, and IA64 don't have
> > CONFIG_ option for IOMMU virtual merging. I prefer to avoid to adding
> > something like CONFIG_HAVE_IOMMU_VMERGE for them. If we add
> > CONFIG_HAVE_IOMMU_VMERGE to them, it's a bit strange not to add the
> > feature to disable virtual merging for them (I guess GART already has
> > the feature though).
> 
> While I think the runtime feature (actually a workaround for broken device
> drivers)

What does "broken device drivers" mean here?

> should be consistently used on all architectures, or removed
> entirely, it's orthogonal to this discussion.
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