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dma-coherent: remove the DMA_MEMORY_MAP and DMA_MEMORY_IO flags

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DMA_MEMORY_IO was never used in the tree, so remove it.  That means there is
no need for the DMA_MEMORY_MAP flag either now, so remove it as well and
change dma_declare_coherent_memory to return a normal errno value.

Signed-off-by: Christoph Hellwig <hch@lst.de>
 Reviewed-by: Marek Szyprowski <m.szyprowski@samsung.com>
This commit is contained in:
Christoph Hellwig
2017-08-25 17:13:09 +02:00
parent b32dbc1e0b
commit 2436bdcda5
11 changed files with 52 additions and 111 deletions
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6
include/linux/dma-mapping.h
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@@ -694,9 +694,7 @@ static inline int dma_get_cache_alignment(void)
#endif
/* flags for the coherent memory api */
#define DMA_MEMORY_MAP 0x01
#define DMA_MEMORY_IO 0x02
#define DMA_MEMORY_EXCLUSIVE 0x04
#define DMA_MEMORY_EXCLUSIVE 0x01
#ifdef CONFIG_HAVE_GENERIC_DMA_COHERENT
int dma_declare_coherent_memory(struct device *dev, phys_addr_t phys_addr,
@@ -709,7 +707,7 @@ static inline int
dma_declare_coherent_memory(struct device *dev, phys_addr_t phys_addr,
dma_addr_t device_addr, size_t size, int flags)
{
return 0;
return -ENOSYS;
}
static inline void