linux-kernel - Re: [PATCH 1/3 v3] dma: document dma_{un}map_{single|sg}

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Message-ID: <20080229212350.GS11012@sgi.com>
Date:	Fri, 29 Feb 2008 13:23:50 -0800
From:	akepner@....com
To:	Michael Ellerman <michael@...erman.id.au>
Cc:	Tony Luck <tony.luck@...el.com>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Jes Sorensen <jes@....com>,
	Randy Dunlap <randy.dunlap@...cle.com>,
	Roland Dreier <rdreier@...co.com>,
	James Bottomley <James.Bottomley@...senpartnership.com>,
	David Miller <davem@...emloft.net>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Grant Grundler <grundler@...isc-linux.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3 v3] dma: document dma_{un}map_{single|sg}_attrs() interface

On Fri, Feb 29, 2008 at 01:45:46PM +1100, Michael Ellerman wrote:
> ....
> I guess I think the attributes should either be truly arch-specific,
> ie. DMA_ATTR_IA64_SYNC_ON_WRITE. Or we need to come up with some well
> defined, and architecture neutral semantics for what the flags mean.
> 

I'd hoped to do just this - to define architecture neutral semantics 
for attributes. 

But I see your point - the documentation in DMA-attributes.txt isn't 
consistent with that plan. Let me see if I can address your concerns 
by changing the documentation. 

-- 
Arthur

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