swiotlb_sync_sg(hwdev, sg, nelems, dir);
swiotlb_sync_sg(hwdev, sg, nelems, dir, SYNC_FOR_CPU);
swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,			int nelems, int dir){	swiotlb_sync_sg(hwdev, sg, nelems, dir);}