void *mmio = (void *) ap->ioaddr.cmd_addr;
void __iomem *mmio = (void __iomem *) ap->ioaddr.cmd_addr;
static u8 ahci_check_err(struct ata_port *ap){	void *mmio = (void *) ap->ioaddr.cmd_addr;	return (readl(mmio + PORT_TFDATA) >> 8) & 0xFF;}