x86: move dma_unmap_single to common header

i386 base does not need it, so it gets an empty function.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 10 insertions, 0 deletions

diff --git a/include/asm-x86/dma-mapping.h b/include/asm-x86/dma-mapping.h
index d320244db8af..bb0378f2b933 100644
--- a/include/asm-x86/dma-mapping.h
+++ b/include/asm-x86/dma-mapping.h
@@ -66,4 +66,14 @@ dma_map_single(struct device *hwdev, void *ptr, size_t size,
         return dma_ops->map_single(hwdev, ptr, size, direction);
 }
 
+static inline void
+dma_unmap_single(struct device *dev, dma_addr_t addr, size_t size,
+                 int direction)
+{
+        BUG_ON(!valid_dma_direction(direction));
+        if (dma_ops->unmap_single)
+                dma_ops->unmap_single(dev, addr, size, direction);
+}
+
+
 #endif