__uart_port_lock_irqsave
__uart_port_lock_irqsave(&amba_ports[co->index]->port, flags);
return __uart_port_lock_irqsave(up, flags);
__uart_port_lock_irqsave(up, flags);
__uart_port_lock_irqsave(port, flags);
__uart_port_lock_irqsave(up, &flags);