Re: [RESEND PATCH 0/3] Add MEMREMAP_WC to fix dma_init_coherent_memory
Hi, Are there any comments on these? Without them dma-coherent can't be used on arm64 so it would be good to get them merged if there are no objections. I can resend with Michal's ack for patch 2 if needed. Thanks, Brian On Tue, Jan 05, 2016 at 04:41:25PM +, Brian Starkey wrote: Hi, This may well have been buried with the holidays. It still applies fine on next-20160105, but I notice patch 2 will trivially conflict with [2] on some context lines. As discussed here[1], these patches implement a MEMREMAP_WC flag for memremap(), which can be used to obtain writecombine mappings. This is then used for setting up dma_coherent_mem regions which use the DMA_MEMORY_MAP flag. Patch 3 makes sure that the appropriate memset function is used when zeroing coherent allocations, which fixes an alignment fault on arm64. Best Regards, Brian [1] http://lists.infradead.org/pipermail/linux-arm-kernel/2015-December/390857.html [2] http://lists.infradead.org/pipermail/linux-arm-kernel/2016-January/397163.html Brian Starkey (3): memremap: add MEMREMAP_WC flag drivers: dma-coherent: use MEMREMAP_WC for DMA_MEMORY_MAP drivers: dma-coherent: use memset_io for DMA_MEMORY_IO drivers/base/dma-coherent.c | 25 - include/linux/io.h |1 + kernel/memremap.c | 15 +-- 3 files changed, 34 insertions(+), 7 deletions(-) -- 1.7.9.5
[RESEND PATCH 0/3] Add MEMREMAP_WC to fix dma_init_coherent_memory
Hi, This may well have been buried with the holidays. It still applies fine on next-20160105, but I notice patch 2 will trivially conflict with [2] on some context lines. As discussed here[1], these patches implement a MEMREMAP_WC flag for memremap(), which can be used to obtain writecombine mappings. This is then used for setting up dma_coherent_mem regions which use the DMA_MEMORY_MAP flag. Patch 3 makes sure that the appropriate memset function is used when zeroing coherent allocations, which fixes an alignment fault on arm64. Best Regards, Brian [1] http://lists.infradead.org/pipermail/linux-arm-kernel/2015-December/390857.html [2] http://lists.infradead.org/pipermail/linux-arm-kernel/2016-January/397163.html Brian Starkey (3): memremap: add MEMREMAP_WC flag drivers: dma-coherent: use MEMREMAP_WC for DMA_MEMORY_MAP drivers: dma-coherent: use memset_io for DMA_MEMORY_IO drivers/base/dma-coherent.c | 25 - include/linux/io.h |1 + kernel/memremap.c | 15 +-- 3 files changed, 34 insertions(+), 7 deletions(-) -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/