kernel.git/arch/unicore32/include/asm/cacheflush.h, branch linux-4.16.y Hosts the 0x221E linux distro kernel. https://git.0xinfinity.dev/distro/kernel.git/atom?h=linux-4.16.y 2017-10-19T14:37:36Z unicore32: make dma_cache_sync a no-op 2017-10-19T14:37:36Z Christoph Hellwig 2017-08-27T08:22:48Z urn:sha1:a535bb801036268c3d057d7584e9c8f35f69aad4 unicore32 does not implement DMA_ATTR_NON_CONSISTENT allocations, so it doesn't make any sense to do any work in dma_cache_sync given that it must be a no-op when dma_alloc_attrs returns coherent memory. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Robin Murphy <robin.murphy@arm.com> unicore32 core architecture: mm related: consistent device DMA handling 2011-03-17T01:19:09Z GuanXuetao 2011-01-15T10:18:29Z urn:sha1:10c9c10c31514564b09c153432a42ffaea3ce831 This patch implements consistent device DMA handling of memory management. DMA device operations are also here. Signed-off-by: Guan Xuetao <gxt@mprc.pku.edu.cn> Reviewed-by: Arnd Bergmann <arnd@arndb.de>