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

[akepner]

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.

There are 3 patches:

[1/3] dma: create linux/dma-direction.h 
[2/3] dma: ia64/sn2 allow "attributes" to be used by dma_map_*
[2/3] dma: x86_64 allow "attributes" to be used by dma_map_*

-- 
Arthur

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/