Messages in this thread | | | From | Brian Starkey <> | Subject | [RESEND PATCH 0/3] Add MEMREMAP_WC to fix dma_init_coherent_memory | Date | Tue, 5 Jan 2016 16:41:25 +0000 |
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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
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