[RFC,1/3] common: DMA-mapping: add DMA_ATTR_READ_ONLY attribute

Message ID 1371707384-30037-2-git-send-email-hdoyu@nvidia.com
State New
Headers show

Commit Message

Hiroshi Doyu June 20, 2013, 5:49 a.m.
This patch adds DMA_ATTR_READ_ONLY attribute to the DMA-mapping
subsystem.

This sets mapping attribute read-only.

Signed-off-by: Hiroshi Doyu <hdoyu@nvidia.com>
---
 include/linux/dma-attrs.h | 1 +
 1 file changed, 1 insertion(+)

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diff --git a/include/linux/dma-attrs.h b/include/linux/dma-attrs.h
index f272809..5d7371c 100644
--- a/include/linux/dma-attrs.h
+++ b/include/linux/dma-attrs.h
@@ -18,6 +18,7 @@  enum dma_attr {
 	DMA_ATTR_NO_KERNEL_MAPPING,
 	DMA_ATTR_SKIP_CPU_SYNC,
 	DMA_ATTR_SKIP_FREE_IOVA,
+	DMA_ATTR_READ_ONLY,
 	DMA_ATTR_MAX,
 };