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dma-mapping: unify dma_get_cache_alignment implementations

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dma_get_cache_alignment returns the minimum DMA alignment.  Architectures
defines it as ARCH_DMA_MINALIGN (formally ARCH_KMALLOC_MINALIGN).  So we
can unify dma_get_cache_alignment implementations.

Note that some architectures implement dma_get_cache_alignment wrongly.
dma_get_cache_alignment() should return the minimum DMA alignment.  So
fully-coherent architectures should return 1.  This patch also fixes this
issue.

Signed-off-by: FUJITA Tomonori <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
FUJITA Tomonori 2010-08-10 18:03:22 -07:00 • committed by Linus Torvalds
commit 4565f0170d
20 changed files with 8 additions and 114 deletions
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1
arch/alpha/include/asm/dma-mapping.h
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@ -44,6 +44,5 @@ static inline int dma_set_mask(struct device *dev, u64 mask)
#define dma_is_consistent(d, h) (1)
#define dma_cache_sync(dev, va, size, dir) ((void)0)
#define dma_get_cache_alignment() L1_CACHE_BYTES
#endif /* _ALPHA_DMA_MAPPING_H */