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Subject[PATCH 2/3] dma-mapping: move valid_dma_direction to dma-direction.h
Date
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>
---
include/linux/dma-direction.h | 8 +++++++-
include/linux/dma-mapping.h | 7 -------
2 files changed, 7 insertions(+), 8 deletions(-)

diff --git a/include/linux/dma-direction.h b/include/linux/dma-direction.h
index 9c96e30e6a0bb0..a2fe4571bc9279 100644
--- 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 e074588d753ff6..51e93d44b826c8 100644
--- 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.
--
2.28.0
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