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scsi: dma-mapping: always provide dma_get_cache_alignment

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Provide the dummy version of dma_get_cache_alignment that always returns
1 even if CONFIG_HAS_DMA is not set, so that drivers and subsystems can
use it without ifdefs.

Cc: stable@vger.kernel.org
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Christoph Hellwig 2017-11-21 14:23:37 +01:00 committed by Martin K. Petersen
parent 727535903b
commit 860dd4424f
1 changed files with 0 additions and 2 deletions
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include/linux/dma-mapping.h
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@ -710,7 +710,6 @@ static inline void *dma_zalloc_coherent(struct device *dev, size_t size,
return ret;
}
#ifdef CONFIG_HAS_DMA
static inline int dma_get_cache_alignment(void)
{
#ifdef ARCH_DMA_MINALIGN
@ -718,7 +717,6 @@ static inline int dma_get_cache_alignment(void)
#endif
return 1;
}
#endif
/* flags for the coherent memory api */
#define DMA_MEMORY_EXCLUSIVE 0x01