[PATCH 1/2] ARM: dma-mapping: Add macro to_dma_iommu_mapping()

[Hiroshi Doyu]

This can be built without CONFIG_ARM_DMA_USE_IOMMU.

Signed-off-by: Hiroshi Doyu <hdoyu at nvidia.com>
---
 arch/arm/include/asm/device.h |    6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/arm/include/asm/device.h b/arch/arm/include/asm/device.h
index 5191a83..6fbe514 100644
--- a/arch/arm/include/asm/device.h
+++ b/arch/arm/include/asm/device.h
@@ -33,4 +33,10 @@ struct pdev_archdata {
 #endif
 };
 
+#ifdef CONFIG_ARM_DMA_USE_IOMMU
+#define to_dma_iommu_mapping(dev) ((dev)->archdata.mapping)
+#else
+#define to_dma_iommu_mapping(dev) NULL
+#endif
+
 #endif
-- 
1.7.9.5