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frv: make dma_cache_sync a no-op

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frv 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 <[email protected]>
Reviewed-by: Robin Murphy <[email protected]>
This commit is contained in:
Christoph Hellwig 2017-08-27 09:59:32 +02:00
commit 9d254b8e40
1 changed files with 0 additions and 1 deletions
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1
arch/frv/include/asm/dma-mapping.h
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@ -18,7 +18,6 @@ static inline
void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
enum dma_data_direction direction)
{
flush_write_buffers();
}
#endif /* _ASM_DMA_MAPPING_H */