dma-mapping: move valid_dma_direction to dma-direction.h

Move the valid_dma_direction helper to a more suitable header, and
clean it up to use the proper enum as well as removing pointless braces.

Signed-off-by: Christoph Hellwig <hch@lst.de>

diff --git a/include/linux/dma-direction.h b/include/linux/dma-direction.h
index 9c96e30..a2fe457 100644 (file)
--- a/include/linux/dma-direction.h
+++ b/include/linux/dma-direction.h
@@ -9,4 +9,10 @@ enum dma_data_direction {
        DMA_NONE = 3,
 };
 
-#endif
+static inline int valid_dma_direction(enum dma_data_direction dir)
+{
+       return dir == DMA_BIDIRECTIONAL || dir == DMA_TO_DEVICE ||
+               dir == DMA_FROM_DEVICE;
+}
+
+#endif /* _LINUX_DMA_DIRECTION_H */

diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index e074588..51e93d4 100644 (file)
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -138,13 +138,6 @@ extern const struct dma_map_ops dma_dummy_ops;
 
 #define DMA_BIT_MASK(n)        (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
 
-static inline int valid_dma_direction(int dma_direction)
-{
-       return ((dma_direction == DMA_BIDIRECTIONAL) ||
-               (dma_direction == DMA_TO_DEVICE) ||
-               (dma_direction == DMA_FROM_DEVICE));
-}
-
 #ifdef CONFIG_DMA_DECLARE_COHERENT
 /*
  * These three functions are only for dma allocator.