powerpc: move device_to_mask() to dma-mapping.h

Move device_to_mask() to dma-mapping.h because we need to use it from
outside dma_64.c in a later patch.

Signed-off-by: Mark Nelson <markn@au1.ibm.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 0 insertions, 9 deletions

diff --git a/arch/powerpc/kernel/dma_64.c b/arch/powerpc/kernel/dma_64.c
index 3ae0c35d21f9..ae5708e3a312 100644
--- a/arch/powerpc/kernel/dma_64.c
+++ b/arch/powerpc/kernel/dma_64.c
@@ -15,15 +15,6 @@
  * Generic iommu implementation
  */
 
-static inline unsigned long device_to_mask(struct device *dev)
-{
-        if (dev->dma_mask && *dev->dma_mask)
-                return *dev->dma_mask;
-        /* Assume devices without mask can take 32 bit addresses */
-        return 0xfffffffful;
-}
-
-
 /* Allocates a contiguous real buffer and creates mappings over it.
  * Returns the virtual address of the buffer and sets dma_handle
  * to the dma address (mapping) of the first page.