diff options
| author | Christoph Hellwig <hch@lst.de> | 2017-08-27 10:07:04 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2017-10-19 16:37:22 +0200 |
| commit | 562437a81aa48e54231896ad36d46439278df4b3 (patch) | |
| tree | 82c43ce18b3bf0becfb0ca017e2bb2b6b9d8dcab /arch/ia64 | |
| parent | 9d254b8e409e90db21384974f4725bff369c333f (diff) | |
ia64: make dma_cache_sync a no-op
ia64 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>
Diffstat (limited to 'arch/ia64')
| -rw-r--r-- | arch/ia64/include/asm/dma-mapping.h | 5 |
1 files changed, 0 insertions, 5 deletions
diff --git a/arch/ia64/include/asm/dma-mapping.h b/arch/ia64/include/asm/dma-mapping.h index 3ce5ab4339f3..99dfc1aa9d3c 100644 --- a/arch/ia64/include/asm/dma-mapping.h +++ b/arch/ia64/include/asm/dma-mapping.h @@ -48,11 +48,6 @@ static inline void dma_cache_sync (struct device *dev, void *vaddr, size_t size, enum dma_data_direction dir) { - /* - * IA-64 is cache-coherent, so this is mostly a no-op. However, we do need to - * ensure that dma_cache_sync() enforces order, hence the mb(). - */ - mb(); } #endif /* _ASM_IA64_DMA_MAPPING_H */ |