Messages in this thread | | | Date | Fri, 29 Jan 2016 09:32:59 +0000 | From | Brian Starkey <> | Subject | Re: [RESEND PATCH 0/3] Add MEMREMAP_WC to fix dma_init_coherent_memory |
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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 +0000, 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 >
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