Merge branch 'for-v3.9' of git://git.linaro.org/people/mszyprowski/linux-dma-mapping

Pull DMA-mapping updates from Marek Szyprowski:
 "This time all patches are related only to ARM DMA-mapping subsystem.
  The main extension provided by this pull request is highmem support.
  Besides that it contains a bunch of small bugfixes and cleanups."

* 'for-v3.9' of git://git.linaro.org/people/mszyprowski/linux-dma-mapping:
  ARM: DMA-mapping: fix memory leak in IOMMU dma-mapping implementation
  ARM: dma-mapping: Add maximum alignment order for dma iommu buffers
  ARM: dma-mapping: use himem for DMA buffers for IOMMU-mapped devices
  ARM: dma-mapping: add support for CMA regions placed in highmem zone
  arm: dma mapping: export arm iommu functions
  ARM: dma-mapping: Add arm_iommu_detach_device()
  ARM: dma-mapping: Add macro to_dma_iommu_mapping()
  ARM: dma-mapping: Set arm_dma_set_mask() for iommu->set_dma_mask()
  ARM: iommu: Include linux/kref.h in asm/dma-iommu.h

arch/arm/include/asm/device.h

@@ -27,4 +27,10 @@ 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

arch/arm/include/asm/dma-iommu.h

@@ -7,6 +7,7 @@
 #include <linux/scatterlist.h>
 #include <linux/dma-debug.h>
 #include <linux/kmemcheck.h>
+#include <linux/kref.h>
 
 struct dma_iommu_mapping {
 	/* iommu specific data */
@@ -29,6 +30,7 @@ void arm_iommu_release_mapping(struct dma_iommu_mapping *mapping);
 
 int arm_iommu_attach_device(struct device *dev,
 					struct dma_iommu_mapping *mapping);
+void arm_iommu_detach_device(struct device *dev);
 
 #endif /* __KERNEL__ */
 #endif