+#ifndef _ASM_DMA_MAPPING_H_
+#define _ASM_DMA_MAPPING_H_
+
+/*
+ * IOMMU interface. See Documentation/DMA-mapping.txt and DMA-API.txt for
+ * documentation.
+ */
+
+#include <linux/scatterlist.h>
+#include <asm/io.h>
+#include <asm/swiotlb.h>
+
+struct dma_mapping_ops {
+       int             (*mapping_error)(dma_addr_t dma_addr);
+       void*           (*alloc_coherent)(struct device *dev, size_t size,
+                               dma_addr_t *dma_handle, gfp_t gfp);
+       void            (*free_coherent)(struct device *dev, size_t size,
+                               void *vaddr, dma_addr_t dma_handle);
+       dma_addr_t      (*map_single)(struct device *hwdev, void *ptr,
+                               size_t size, int direction);
+       /* like map_single, but doesn't check the device mask */
+       dma_addr_t      (*map_simple)(struct device *hwdev, char *ptr,
+                               size_t size, int direction);
+       void            (*unmap_single)(struct device *dev, dma_addr_t addr,
+                               size_t size, int direction);
+       void            (*sync_single_for_cpu)(struct device *hwdev,
+                               dma_addr_t dma_handle, size_t size,
+                               int direction);
+       void            (*sync_single_for_device)(struct device *hwdev,
+                               dma_addr_t dma_handle, size_t size,
+                               int direction);
+       void            (*sync_single_range_for_cpu)(struct device *hwdev,
+                               dma_addr_t dma_handle, unsigned long offset,
+                               size_t size, int direction);
+       void            (*sync_single_range_for_device)(struct device *hwdev,
+                               dma_addr_t dma_handle, unsigned long offset,
+                               size_t size, int direction);
+       void            (*sync_sg_for_cpu)(struct device *hwdev,
+                               struct scatterlist *sg, int nelems,
+                               int direction);
+       void            (*sync_sg_for_device)(struct device *hwdev,
+                               struct scatterlist *sg, int nelems,
+                               int direction);
+       int             (*map_sg)(struct device *hwdev, struct scatterlist *sg,
+                               int nents, int direction);
+       void            (*unmap_sg)(struct device *hwdev,
+                               struct scatterlist *sg, int nents,
+                               int direction);
+       int             (*dma_supported)(struct device *hwdev, u64 mask);
+       int             is_phys;
+};
+
 #ifdef CONFIG_X86_32
 # include "dma-mapping_32.h"
 #else
 # include "dma-mapping_64.h"
 #endif
+
+#endif
 
 #ifndef _X8664_DMA_MAPPING_H
 #define _X8664_DMA_MAPPING_H 1
 
-/*
- * IOMMU interface. See Documentation/DMA-mapping.txt and DMA-API.txt for
- * documentation.
- */
-
-#include <linux/scatterlist.h>
-#include <asm/io.h>
-#include <asm/swiotlb.h>
-
-struct dma_mapping_ops {
-       int             (*mapping_error)(dma_addr_t dma_addr);
-       void*           (*alloc_coherent)(struct device *dev, size_t size,
-                                dma_addr_t *dma_handle, gfp_t gfp);
-       void            (*free_coherent)(struct device *dev, size_t size,
-                                void *vaddr, dma_addr_t dma_handle);
-       dma_addr_t      (*map_single)(struct device *hwdev, void *ptr,
-                                size_t size, int direction);
-       /* like map_single, but doesn't check the device mask */
-       dma_addr_t      (*map_simple)(struct device *hwdev, char *ptr,
-                                size_t size, int direction);
-       void            (*unmap_single)(struct device *dev, dma_addr_t addr,
-                               size_t size, int direction);
-       void            (*sync_single_for_cpu)(struct device *hwdev,
-                               dma_addr_t dma_handle, size_t size,
-                               int direction);
-       void            (*sync_single_for_device)(struct device *hwdev,
-                                dma_addr_t dma_handle, size_t size,
-                               int direction);
-       void            (*sync_single_range_for_cpu)(struct device *hwdev,
-                                dma_addr_t dma_handle, unsigned long offset,
-                               size_t size, int direction);
-       void            (*sync_single_range_for_device)(struct device *hwdev,
-                               dma_addr_t dma_handle, unsigned long offset,
-                               size_t size, int direction);
-       void            (*sync_sg_for_cpu)(struct device *hwdev,
-                                struct scatterlist *sg, int nelems,
-                               int direction);
-       void            (*sync_sg_for_device)(struct device *hwdev,
-                               struct scatterlist *sg, int nelems,
-                               int direction);
-       int             (*map_sg)(struct device *hwdev, struct scatterlist *sg,
-                               int nents, int direction);
-       void            (*unmap_sg)(struct device *hwdev,
-                               struct scatterlist *sg, int nents,
-                               int direction);
-       int             (*dma_supported)(struct device *hwdev, u64 mask);
-       int             is_phys;
-};
-
 extern dma_addr_t bad_dma_address;
 extern const struct dma_mapping_ops* dma_ops;
 extern int iommu_merge;