[PATCH] Move valid_dma_direction() from x86_64 to generic code

[Rolf Eike Beer <eike-kernel@sf-tec.de>]

As suggested by Muli Ben-Yehuda this function is moved to generic code as
may be useful for all archs.

Signed-off-by: Rolf Eike Beer <eike-kernel@sf-tec.de>

---
commit 9f990495512e3f106ce56f885a675636b47ff421
tree ad2864a5204c57d9836ff2360d6bf80c0d2246e3
parent 3ac898b16fb75cd996ec98fa578ea06b6ffb2760
author Rolf Eike Beer <eike-kernel@sf-tec.de> Wed, 02 Aug 2006 17:07:56 +0200
committer Rolf Eike Beer <beer@siso-eb-i34d.silicon-software.de> Wed, 02 Aug 2006 17:07:56 +0200

 include/asm-x86_64/dma-mapping.h |    7 -------
 include/linux/dma-mapping.h      |    7 +++++++
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/include/asm-x86_64/dma-mapping.h b/include/asm-x86_64/dma-mapping.h
index b6da83d..10174b1 100644
--- a/include/asm-x86_64/dma-mapping.h
+++ b/include/asm-x86_64/dma-mapping.h
@@ -55,13 +55,6 @@ extern dma_addr_t bad_dma_address;
 extern struct dma_mapping_ops* dma_ops;
 extern int iommu_merge;
 
-static inline int valid_dma_direction(int dma_direction)
-{
-	return ((dma_direction == DMA_BIDIRECTIONAL) ||
-		(dma_direction == DMA_TO_DEVICE) ||
-		(dma_direction == DMA_FROM_DEVICE));
-}
-
 static inline int dma_mapping_error(dma_addr_t dma_addr)
 {
 	if (dma_ops->mapping_error)
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index 635690c..ff203c4 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -24,6 +24,13 @@ #define DMA_29BIT_MASK	0x000000001ffffff
 #define DMA_28BIT_MASK	0x000000000fffffffULL
 #define DMA_24BIT_MASK	0x0000000000ffffffULL
 
+static inline int valid_dma_direction(int dma_direction)
+{
+	return ((dma_direction == DMA_BIDIRECTIONAL) ||
+		(dma_direction == DMA_TO_DEVICE) ||
+		(dma_direction == DMA_FROM_DEVICE));
+}
+
 #include <asm/dma-mapping.h>
 
 /* Backwards compat, remove in 2.7.x */