phys_req
struct phys_req preq;
static int xen_vbd_translate(struct phys_req *req, struct xen_blkif *blkif,
struct phys_req *preq)
struct phys_req preq;
unsigned long phys_req = virt_to_phys(req);
outl(phys_req, gdev->io_port + VMMDEV_PORT_OFF_REQUEST);