[PATCH 1/4] dma-mapping: Constify attrs passed to dma_get_attr

[Krzysztof Kozlowski]

The dma_get_attr() does not modify passed dma_attrs so the pointer can
point to const data.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@xxxxxxxxxxx>
---
 include/linux/dma-attrs.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/linux/dma-attrs.h b/include/linux/dma-attrs.h
index 5246239a4953..f3c5aeadb100 100644
--- a/include/linux/dma-attrs.h
+++ b/include/linux/dma-attrs.h
@@ -60,7 +60,8 @@ static inline void dma_set_attr(enum dma_attr attr, struct dma_attrs *attrs)
  * @attr: attribute to set
  * @attrs: struct dma_attrs (may be NULL)
  */
-static inline int dma_get_attr(enum dma_attr attr, struct dma_attrs *attrs)
+static inline int dma_get_attr(enum dma_attr attr,
+			       const struct dma_attrs *attrs)
 {
 	if (attrs == NULL)
 		return 0;
-- 
1.9.1