uart_rxfifo_numchars
int uart_rxfifo_numchars(struct uart_softc *sc);
else if (uart_rxfifo_numchars(sc->backend) > 0 &&
if (uart_rxfifo_numchars(sc->backend) > 0)
old_size = uart_rxfifo_numchars(sc->backend);
uart_rxfifo_numchars(sc->backend) >= trig_lvl)
if (uart_rxfifo_numchars(sc->backend) > 0)
fifo_sz = uart_rxfifo_numchars(sc->backend);
fifo_sz = uart_rxfifo_numchars(sc->backend);