aboutsummaryrefslogtreecommitdiffstats
path: root/Documentation/DMA-API.txt
diff options
context:
space:
mode:
authorFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>2010-08-11 01:03:25 (GMT)
committerLinus Torvalds <torvalds@linux-foundation.org>2010-08-11 15:59:21 (GMT)
commit3b9c6c11f519718d618f5d7c9508daf78b207f6f (patch)
tree6c99992e25b9305fbe3977dff30f5eeb445f25e0 /Documentation/DMA-API.txt
parentd80e0d96a328cc864a1cb359f545a6ed0c61812d (diff)
downloadkernel_replicant_linux-3b9c6c11f519718d618f5d7c9508daf78b207f6f.zip
kernel_replicant_linux-3b9c6c11f519718d618f5d7c9508daf78b207f6f.tar.gz
kernel_replicant_linux-3b9c6c11f519718d618f5d7c9508daf78b207f6f.tar.bz2
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 'Documentation/DMA-API.txt')
-rw-r--r--Documentation/DMA-API.txt6
1 files changed, 0 insertions, 6 deletions
diff --git a/Documentation/DMA-API.txt b/Documentation/DMA-API.txt
index 05e2ae2..fe23269 100644
--- a/Documentation/DMA-API.txt
+++ b/Documentation/DMA-API.txt
@@ -456,12 +456,6 @@ be identical to those passed in (and returned by
dma_alloc_noncoherent()).
int
-dma_is_consistent(struct device *dev, dma_addr_t dma_handle)
-
-Returns true if the device dev is performing consistent DMA on the memory
-area pointed to by the dma_handle.
-
-int
dma_get_cache_alignment(void)
Returns the processor cache alignment. This is the absolute minimum