IER_ERLS          634 arch/i386/isa/pccom.c 		sc->sc_ier = IER_ERXRDY | IER_ERLS | IER_EMSC;
IER_ERLS          407 dev/ic/com.c   		sc->sc_ier = IER_ERXRDY | IER_ERLS | IER_EMSC;