diff options
| author | FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> | 2010-08-11 05:03:25 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-08-11 19:59:21 +0400 |
| commit | 3b9c6c11f519718d618f5d7c9508daf78b207f6f (patch) | |
| tree | 6c99992e25b9305fbe3977dff30f5eeb445f25e0 /arch/powerpc | |
| parent | d80e0d96a328cc864a1cb359f545a6ed0c61812d (diff) | |
| download | linux-3b9c6c11f519718d618f5d7c9508daf78b207f6f.tar.xz | |
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/powerpc')
| -rw-r--r-- | arch/powerpc/include/asm/dma-mapping.h | 5 |
1 files changed, 0 insertions, 5 deletions
diff --git a/arch/powerpc/include/asm/dma-mapping.h b/arch/powerpc/include/asm/dma-mapping.h index a77ba280af04..8c9c6ad2004e 100644 --- a/arch/powerpc/include/asm/dma-mapping.h +++ b/arch/powerpc/include/asm/dma-mapping.h @@ -209,11 +209,6 @@ static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr) #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f) #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h) -#ifdef CONFIG_NOT_COHERENT_CACHE -#define dma_is_consistent(d, h) (0) -#else -#define dma_is_consistent(d, h) (1) -#endif static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size, enum dma_data_direction direction) |