linux-kernel - Re: [PATCH 2/3] dma: override "dma_flags_set

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Message-ID: <46C94FD5.6000006@sgi.com>
Date:	Mon, 20 Aug 2007 10:24:53 +0200
From:	Jes Sorensen <jes@....com>
To:	akepner@....com
Cc:	linux-kernel <linux-kernel@...r.kernel.org>, rdreier@...co.com,
	linux-ia64 <linux-ia64@...r.kernel.org>
Subject: Re: [PATCH 2/3] dma: override "dma_flags_set_dmaflush" for sn-ia64

akepner@....com wrote:
> Define ARCH_DOES_POSTED_DMA, and override the dma_flags_set_dmaflush 
> function. Also define dma_flags_get_direction, dma_flags_get_dmaflush 
> to retrieve the direction and "dmaflush attribute" from flags 
> passed to the sn_dma_map_* functions.
> 

Hi Arthur,

I'm a little concerned about changing the API for the dma_ foo
functions, which are defined cross platform. If you want to change
that, I think it will require updating the documentation explaining
it.

Regarding ARCH_DOES_POSTED_DMA, is that sufficient as a #define or
does it have to be run-time tested? (does it do anything at this
stage). I ask since not all ia64 platforms do posted DMA.

Cheers,
Jes
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