linux-kernel - Re: [PATCH] add iommu_num

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Message-ID: <20080730140339.GN4851@amd.com>
Date:	Wed, 30 Jul 2008 16:03:39 +0200
From:	Joerg Roedel <joerg.roedel@....com>
To:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
CC:	davem@...emloft.net, sfr@...b.auug.org.au, mingo@...e.hu,
	mingo@...hat.com, tglx@...utronix.de, linux-kernel@...r.kernel.org,
	iommu@...ts.linux-foundation.org, bhavna.sarathy@....com,
	robert.richter@....com, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, jbarnes@...tuousgeek.org,
	linux-next@...r.kernel.org
Subject: Re: [PATCH] add iommu_num_pages helper function

On Wed, Jul 30, 2008 at 10:16:05PM +0900, FUJITA Tomonori wrote:
> On Wed, 30 Jul 2008 14:18:05 +0200
> Joerg Roedel <joerg.roedel@....com> wrote:

> > Ok, after setting up cross compile environments for sparc64 and
> > powerpc64 I wrote a patch which adds the io_page_size argument to the
> > iommu_num pages function and moves the function back to
> > lib/iommu-helper.c.
> 
> You need ia64, parisc, and alpha too. :) 
> 
> I have cross compile environments for them so I can take care of them
> if you like.

Ok, so you suggest to create a patchset to convert the other IOMMU
implementations too. Thats fine for me, I will try to do it :)
Do you have hardware to do runtime tests of the code? I have hardware
only for x86, sparc64 and alpha.

> 
> > The patch touches all 3 architectures and can not be
> > split in a bisectable way.
> 
> How about naming a new helper function iommu_nr_pages (or something)?
> 
> Then you can do the conversion independently. If we like, we use
> iommu_num_pages name after the conversion.

Ok, this would mean only 3 renaming patches to keep the patch series
bisectable. This should be acceptable.

> 
> > Who is the best person to send this patch to?
> 
> The -mm is an appropriate tree, I think.

Ok, then I submit it to Andrew once its tested.

Thanks,

Joerg

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