Fix DMA compile for x86_64.

Signed-off-by: Xin Li <xin.b.li@intel.com>

linux-2.6-xen-sparse/arch/xen/x86_64/kernel/pci-dma.c

@@ -231,7 +231,7 @@ dma_map_single(struct device *dev, void *ptr, size_t size,
 	 * boundary. Take into account buffer start offset. All other calls are
 	 * conservative and always search the dma_map list if it's non-empty.
 	 */
-	if ((((unsigned int)ptr & ~PAGE_MASK) + size) <= PAGE_SIZE) {
+	if (((((unsigned long)ptr) & ~PAGE_MASK) + size) <= PAGE_SIZE) {
 		dma = virt_to_bus(ptr);
 	} else {
 		BUG_ON((bnc = dma_alloc_coherent(dev, size, &dma, 0)) == NULL);
@@ -247,7 +247,7 @@ dma_map_single(struct device *dev, void *ptr, size_t size,
 		spin_unlock_irqrestore(&dma_map_lock, flags);
 	}
 
-	if ((dma+size) & ~*hwdev->dma_mask)
+	if ((dma+size) & ~*dev->dma_mask)
 		out_of_line_bug();
 	return dma;
 }

linux-2.6-xen-sparse/include/asm-xen/asm-x86_64/dma-mapping.h

@@ -22,20 +22,20 @@ void dma_free_coherent(struct device *dev, size_t size, void *vaddr,
 			 dma_addr_t dma_handle);
 
 extern dma_addr_t dma_map_single(struct device *hwdev, void *ptr, size_t size,
-				 int direction);
+				 enum dma_data_direction direction);
 extern void dma_unmap_single(struct device *dev, dma_addr_t addr,size_t size,
-			     int direction);
+			     enum dma_data_direction direction);
 
 #define dma_map_page(dev,page,offset,size,dir) \
 	dma_map_single((dev), page_address(page)+(offset), (size), (dir))
 
 extern void
 dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
-			int direction);
+			enum dma_data_direction direction);
 
 extern void
 dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size,
-                           int direction);
+                           enum dma_data_direction direction);
 
 static inline void dma_sync_sg_for_cpu(struct device *hwdev,
 				       struct scatterlist *sg,