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authorFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>2010-08-10 21:03:25 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2010-08-11 11:59:21 -0400
commit3b9c6c11f519718d618f5d7c9508daf78b207f6f (patch)
tree6c99992e25b9305fbe3977dff30f5eeb445f25e0 /arch/um
parentd80e0d96a328cc864a1cb359f545a6ed0c61812d (diff)
dma-mapping: remove dma_is_consistent API
Architectures implement dma_is_consistent() in different ways (some misinterpret the definition of API in DMA-API.txt). So it hasn't been so useful for drivers. We have only one user of the API in tree. Unlikely out-of-tree drivers use the API. Even if we fix dma_is_consistent() in some architectures, it doesn't look useful at all. It was invented long ago for some old systems that can't allocate coherent memory at all. It's better to export only APIs that are definitely necessary for drivers. Let's remove this API. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/um')
-rw-r--r--arch/um/include/asm/dma-mapping.h1
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/um/include/asm/dma-mapping.h b/arch/um/include/asm/dma-mapping.h
index b948c14a7867..17a2cb5a4178 100644
--- a/arch/um/include/asm/dma-mapping.h
+++ b/arch/um/include/asm/dma-mapping.h
@@ -94,7 +94,6 @@ dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
94 94
95#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f) 95#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
96#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h) 96#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
97#define dma_is_consistent(d, h) (1)
98 97
99static inline int 98static inline int
100dma_get_cache_alignment(void) 99dma_get_cache_alignment(void)