Messages in this thread | | | Date | Wed, 10 Feb 2010 22:40:30 +0000 | From | Russell King - ARM Linux <> | Subject | Re: [RFC 0/2] fix dma_map_sg not to do barriers for each buffer |
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On Wed, Feb 10, 2010 at 01:27:47PM -0800, Randy Dunlap wrote: > On 02/10/10 12:37, adharmap@codeaurora.org wrote: > > From: Abhijeet Dharmapurikar <adharmap@quicinc.com> > > > > Please refer to the post here > > http://lkml.org/lkml/2010/1/4/347 > > > > These changes are to introduce barrierless dma_map_area and dma_unmap_area and > > use them to map the buffers in the scatterlist. For the last buffer, call > > the normal dma_map_area(aka with barriers) effectively executing the barrier > > at the end of the operation. > > > > Note that the barrierless operations are implemented for few arm > > architectures only and I would implement for others once these are okayed by the > > community. > > So when you add these interfaces for other architectures, you will also > update Documentation/DMA-API.txt, right??
Do we need barrier-less interfaces for anything other than the dma_*_sg functions?
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