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| author | Christoph Hellwig <hch@lst.de> | 2017-08-27 10:35:40 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2017-10-19 16:37:44 +0200 |
| commit | e0c6584df9c414b50de17e1abc1099f7501bbb60 (patch) | |
| tree | a683b944a85576069343932bd4fe2fa78284074a /arch/sh/include | |
| parent | d708e71ed78f56330325e8de304e2fb1e38ccf1c (diff) | |
| download | linux-rt-e0c6584df9c414b50de17e1abc1099f7501bbb60.tar.gz | |
sh: make dma_cache_sync a no-op
sh 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.
On the other hand sh uses dma_cache_sync internally in the dma_ops
implementation and for the maple bus that does not use the DMA API,
so a the old functionality for dma_cache_sync is still provided under
the name sh_sync_dma_for_device, and without the redundant dev
argument. While at it two of the syncing dma_ops also go the proper
_for_device postfix.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Diffstat (limited to 'arch/sh/include')
| -rw-r--r-- | arch/sh/include/asm/dma-mapping.h | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/arch/sh/include/asm/dma-mapping.h b/arch/sh/include/asm/dma-mapping.h index 9b06be07db4d..b46194ecef17 100644 --- a/arch/sh/include/asm/dma-mapping.h +++ b/arch/sh/include/asm/dma-mapping.h @@ -9,8 +9,10 @@ static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus) return dma_ops; } -void dma_cache_sync(struct device *dev, void *vaddr, size_t size, - enum dma_data_direction dir); +static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size, + enum dma_data_direction dir) +{ +} /* arch/sh/mm/consistent.c */ extern void *dma_generic_alloc_coherent(struct device *dev, size_t size, @@ -20,4 +22,7 @@ extern void dma_generic_free_coherent(struct device *dev, size_t size, void *vaddr, dma_addr_t dma_handle, unsigned long attrs); +void sh_sync_dma_for_device(void *vaddr, size_t size, + enum dma_data_direction dir); + #endif /* __ASM_SH_DMA_MAPPING_H */ |