2 files changed, 9 insertions, 0 deletions

diff --git a/Documentation/DMA-attributes.txt b/Documentation/DMA-attributes.txt
index 811a5d458da..5c72eed8956 100644
--- a/Documentation/DMA-attributes.txt
+++ b/Documentation/DMA-attributes.txt
@@ -41,3 +41,11 @@ buffered to improve performance.
 Since it is optional for platforms to implement DMA_ATTR_WRITE_COMBINE,
 those that do not will simply ignore the attribute and exhibit default
 behavior.
+
+DMA_ATTR_NON_CONSISTENT
+-----------------------
+
+DMA_ATTR_NON_CONSISTENT lets the platform to choose to return either
+consistent or non-consistent memory as it sees fit.  By using this API,
+you are guaranteeing to the platform that you have all the correct and
+necessary sync points for this memory in the driver.
diff --git a/include/linux/dma-attrs.h b/include/linux/dma-attrs.h
index ada61e1abf2..547ab568d3a 100644
--- a/include/linux/dma-attrs.h
+++ b/include/linux/dma-attrs.h
@@ -14,6 +14,7 @@ enum dma_attr {
         DMA_ATTR_WRITE_BARRIER,
         DMA_ATTR_WEAK_ORDERING,
         DMA_ATTR_WRITE_COMBINE,
+        DMA_ATTR_NON_CONSISTENT,
         DMA_ATTR_MAX,
 };