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dma-mapping: fix build errors on !HAS_DMA architectures

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commit 4565f0170d "dma-mapping: unify
dma_get_cache_alignment implementations" causes build errors on
!HAS_DMA architectures/platforms like s390 and sun3:

include/linux/dma-mapping.h:145: error: static declaration of 'dma_get_cache_alignment' follows non-static declaration
include/asm-generic/dma-mapping-broken.h:73: error: previous declaration of 'dma_get_cache_alignment' was here

Fix this by adding an explicit ifdef.

Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Heiko Carstens 2010-08-13 09:39:18 +02:00 committed by Linus Torvalds
parent c7dcf87a68
commit e259f191f2
1 changed files with 2 additions and 0 deletions
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2
include/linux/dma-mapping.h
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@ -142,6 +142,7 @@ static inline int dma_set_seg_boundary(struct device *dev, unsigned long mask)
return -EIO;
}
#ifdef CONFIG_HAS_DMA
static inline int dma_get_cache_alignment(void)
{
#ifdef ARCH_DMA_MINALIGN
@ -149,6 +150,7 @@ static inline int dma_get_cache_alignment(void)
#endif
return 1;
}
#endif
/* flags for the coherent memory api */
#define DMA_MEMORY_MAP 0x01