From c9eb6172c328dde7e14812f94f8da87b691e41b5 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Sun, 27 Aug 2017 10:37:15 +0200 Subject: dma-mapping: turn dma_cache_sync into a dma_map_ops method After we removed all the dead wood it turns out only two architectures actually implement dma_cache_sync as a real op: mips and parisc. Add a cache_sync method to struct dma_map_ops and implement it for the mips defualt DMA ops, and the parisc pa11 ops. Note that arm, arc and openrisc support DMA_ATTR_NON_CONSISTENT, but never provided a functional dma_cache_sync implementations, which seems somewhat odd. Signed-off-by: Christoph Hellwig Reviewed-by: Robin Murphy --- arch/nios2/include/asm/dma-mapping.h | 9 --------- 1 file changed, 9 deletions(-) (limited to 'arch/nios2') diff --git a/arch/nios2/include/asm/dma-mapping.h b/arch/nios2/include/asm/dma-mapping.h index f8dc62222741..6ceb92251da0 100644 --- a/arch/nios2/include/asm/dma-mapping.h +++ b/arch/nios2/include/asm/dma-mapping.h @@ -17,13 +17,4 @@ static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus) return &nios2_dma_ops; } -/* - * dma_alloc_attrs() always returns non-cacheable memory, so there's no need to - * do any flushing here. - */ -static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size, - enum dma_data_direction direction) -{ -} - #endif /* _ASM_NIOS2_DMA_MAPPING_H */ -- cgit