linux-kernel - [PATCH 1/2] ARM: dma-mapping: Add macro to_dma_iommu

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Date:	Thu, 24 Jan 2013 15:16:56 +0200
From:	Hiroshi Doyu <hdoyu@...dia.com>
To:	<linux-arm-kernel@...ts.infradead.org>
CC:	Hiroshi Doyu <hdoyu@...dia.com>,
	Russell King <linux@....linux.org.uk>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Arnd Bergmann <arnd@...db.de>, <linux-kernel@...r.kernel.org>
Subject: [PATCH 1/2] ARM: dma-mapping: Add macro to_dma_iommu_mapping()

This can be built without CONFIG_ARM_DMA_USE_IOMMU.

Signed-off-by: Hiroshi Doyu <hdoyu@...dia.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

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