From mboxrd@z Thu Jan 1 00:00:00 1970 From: brian.starkey@arm.com (Brian Starkey) Date: Mon, 8 Feb 2016 17:30:49 +0000 Subject: [RESEND2 PATCH 0/3] Fix kernel panic in dma-coherent Message-ID: To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hi, I'm resending these again to try and garner some interest. Without this series, dma-coherent cannot be used on arm64 platforms. The decision to add MEMREMAP_WC came out of a previous discussion with Dan Williams and Catalin Marinas about the same problem[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. They apply cleanly on 4.5-rc3. 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 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