Re: [RFC/PARTIAL PATCH 0/3] dma: passing "attributes" to dma_map_*routines

[Christoph Hellwig]

On Mon, Jan 07, 2008 at 06:32:22PM -0800, akepner@xxxxxxx wrote:
> 
> The following patchset allows additional "attributes" to be 
> passed to dma_map_*/dma_unmap_* implementations. (The reason 
> why this is useful/necessary has been mentioned several times, 
> most recently here:
> http://marc.info/?l=linux-kernel&m=119258541412724&w=2.)
> 
> This is incomplete in that only ia64 and x86_64 are supported - 
> the purpose is mainly to give us something specific to discuss. 
> 
> The approach here is to change the dma_map_* interface so 
> that the last argument is an u32 which encodes the direction 
> of the dma and, optionally, other attributes. Changing the 
> interface is a bit intrusive, but callers of dma_map_* don't 
> need to be modified.

Onething I've missed with these patches is drivers actually using
it.  What driver actually needs it and why don't you send patches
for them?
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