Messages in this thread | | | Subject | Re: [RFC] dma: passing "attributes" to dma_map_* routines | From | Roland Dreier <> | Date | Tue, 18 Dec 2007 13:09:49 -0800 |
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> 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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