Re: [RFC] dma: passing "attributes" to dma_map_* routines

[Roland Dreier]

 > However, your older patch series looks like you want this behavior also
 > in areas which are mapped by dma_map_sg(), do you?.  Still, adding two
 > functions of the kind like above, if necessary, might still be
 > preferable to changing the call parameters of existing functions or to
 > overloading enum dma_data_direction.

Yes, the _sg variants are needed, because we want to map userspace
regions with this attribute and there's of course no guarantee that
userspace memory is contiguous.

 - R.
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