taglinefilesource code
port3680drivers/char/serial.cif (!multi->port3)
port3682drivers/char/serial.cif ((inb(multi->port3) & multi->mask3) != multi->match3)
port31723drivers/char/serial.cret.port3 = multi->port3;
port31771drivers/char/serial.cmulti->port3 = new_multi.port3;
port392include/linux/serial.hint    port3;
port3173include/linux/serial.hint    port3;