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android_kernel_xiaomi_sm8450/arch/hexagon/kernel
Christoph Hellwig 37fca4bd01 hexagon: remove the sync_single_for_cpu DMA operation
hexagon does all the required cache maintainance at dma map time, and none
at unmap time.  It thus has to implement sync_single_for_device to match
the map cace for buffer reuse, but there is no point in doing another
invalidation in the sync_single_cpu_case, which in terms of cache
maintainance is equivalent to the unmap case.

Signed-off-by: Christoph Hellwig <hch@lst.de>
2018-09-08 11:17:30 +02:00
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