The patch titled Subject: arch/avr32: add option to skip sync on DMA map has been added to the -mm tree. Its filename is arch-avr32-add-option-to-skip-sync-on-dma-map.patch This patch should soon appear at http://ozlabs.org/~akpm/mmots/broken-out/arch-avr32-add-option-to-skip-sync-on-dma-map.patch and later at http://ozlabs.org/~akpm/mmotm/broken-out/arch-avr32-add-option-to-skip-sync-on-dma-map.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** The -mm tree is included into linux-next and is updated there every 3-4 working days ------------------------------------------------------ From: Alexander Duyck <alexander.h.duyck@xxxxxxxxx> Subject: arch/avr32: add option to skip sync on DMA map The use of DMA_ATTR_SKIP_CPU_SYNC was not consistent across all of the DMA APIs in the arch/arm folder. This change is meant to correct that so that we get consistent behavior. Link: http://lkml.kernel.org/r/20161110113430.76501.79737.stgit@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx Signed-off-by: Alexander Duyck <alexander.h.duyck@xxxxxxxxx> Acked-by: Hans-Christian Noren Egtvedt <egtvedt@xxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- arch/avr32/mm/dma-coherent.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff -puN arch/avr32/mm/dma-coherent.c~arch-avr32-add-option-to-skip-sync-on-dma-map arch/avr32/mm/dma-coherent.c --- a/arch/avr32/mm/dma-coherent.c~arch-avr32-add-option-to-skip-sync-on-dma-map +++ a/arch/avr32/mm/dma-coherent.c @@ -146,7 +146,8 @@ static dma_addr_t avr32_dma_map_page(str { void *cpu_addr = page_address(page) + offset; - dma_cache_sync(dev, cpu_addr, size, direction); + if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC)) + dma_cache_sync(dev, cpu_addr, size, direction); return virt_to_bus(cpu_addr); } @@ -162,6 +163,10 @@ static int avr32_dma_map_sg(struct devic sg->dma_address = page_to_bus(sg_page(sg)) + sg->offset; virt = sg_virt(sg); + + if (attrs & DMA_ATTR_SKIP_CPU_SYNC) + continue; + dma_cache_sync(dev, virt, sg->length, direction); } _ Patches currently in -mm which might be from alexander.h.duyck@xxxxxxxxx are arch-arc-add-option-to-skip-sync-on-dma-mapping.patch arch-arm-add-option-to-skip-sync-on-dma-map-and-unmap.patch arch-avr32-add-option-to-skip-sync-on-dma-map.patch arch-blackfin-add-option-to-skip-sync-on-dma-map.patch arch-c6x-add-option-to-skip-sync-on-dma-map-and-unmap.patch arch-frv-add-option-to-skip-sync-on-dma-map.patch arch-hexagon-add-option-to-skip-dma-sync-as-a-part-of-mapping.patch arch-m68k-add-option-to-skip-dma-sync-as-a-part-of-mapping.patch arch-metag-add-option-to-skip-dma-sync-as-a-part-of-map-and-unmap.patch arch-microblaze-add-option-to-skip-dma-sync-as-a-part-of-map-and-unmap.patch arch-mips-add-option-to-skip-dma-sync-as-a-part-of-map-and-unmap.patch arch-nios2-add-option-to-skip-dma-sync-as-a-part-of-map-and-unmap.patch arch-openrisc-add-option-to-skip-dma-sync-as-a-part-of-mapping.patch arch-parisc-add-option-to-skip-dma-sync-as-a-part-of-map-and-unmap.patch arch-powerpc-add-option-to-skip-dma-sync-as-a-part-of-mapping.patch arch-sh-add-option-to-skip-dma-sync-as-a-part-of-mapping.patch arch-sparc-add-option-to-skip-dma-sync-as-a-part-of-map-and-unmap.patch arch-tile-add-option-to-skip-dma-sync-as-a-part-of-map-and-unmap.patch arch-xtensa-add-option-to-skip-dma-sync-as-a-part-of-mapping.patch dma-add-calls-for-dma_map_page_attrs-and-dma_unmap_page_attrs.patch mm-add-support-for-releasing-multiple-instances-of-a-page.patch igb-update-driver-to-make-use-of-dma_attr_skip_cpu_sync.patch igb-update-code-to-better-handle-incrementing-page-count.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html