From: Abhijeet Dharmapurikar <adharmap@xxxxxxxxxxx> 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. Abhijeet Dharmapurikar (2): dma: define barrierless versions of map and unmap area dma: fix scatter-gather api to use barrierless map/unmap functions arch/arm/include/asm/cacheflush.h | 9 +++ arch/arm/include/asm/dma-mapping.h | 82 +++++++++++++++++++++ arch/arm/mm/cache-v3.S | 6 ++ arch/arm/mm/cache-v4.S | 6 ++ arch/arm/mm/cache-v4wb.S | 94 +++++++++++++++++------- arch/arm/mm/cache-v4wt.S | 6 ++ arch/arm/mm/cache-v6.S | 139 +++++++++++++++++++++++++---------- arch/arm/mm/cache-v7.S | 120 +++++++++++++++++++++++-------- arch/arm/mm/dma-mapping.c | 55 +++++++++++++-- 9 files changed, 414 insertions(+), 103 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
