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mn10300: make dma_cache_sync a no-op

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mn10300 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>
This commit is contained in:
Christoph Hellwig 2017-08-27 10:16:02 +02:00
parent 64dc8700c0
commit 622bd02207
1 changed files with 0 additions and 4 deletions
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4
arch/mn10300/include/asm/dma-mapping.h
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@ -11,9 +11,6 @@
#ifndef _ASM_DMA_MAPPING_H
#define _ASM_DMA_MAPPING_H
#include <asm/cache.h>
#include <asm/io.h>
extern const struct dma_map_ops mn10300_dma_ops;
static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
@ -25,7 +22,6 @@ static inline
void dma_cache_sync(void *vaddr, size_t size,
enum dma_data_direction direction)
{
mn10300_dcache_flush_inv();
}
#endif