-extern int dma_map_sg(struct device *hwdev, struct scatterlist *sg,
- int nents, enum dma_data_direction direction);
-extern void dma_unmap_sg(struct device *hwdev, struct scatterlist *sg,
- int nents, enum dma_data_direction direction);
+extern int
+dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
+ enum dma_data_direction direction);