SER_DSR
sig, SER_DSR, SER_DDSR);
SIGCHG(bes & BES_SYNC, sig, SER_DSR, SER_DDSR);
SIGCHG(bes & BES_SYNC, sig, SER_DSR, SER_DDSR);
SIGCHG(dummy, sig, SER_DSR, SER_DDSR);
SIGCHG(bes & BES_SYNC, sig, SER_DSR, SER_DDSR);
SIGCHG(bes & BES_SYNC, sig, SER_DSR, SER_DDSR);
sc->sc_msr |= (param & USIE_DSR) ? SER_DSR : 0;
sc->sc_msr |= SER_DSR;
sc->sc_msr[ucom->sc_subunit] |= SER_DSR;
sc->sc_msr |= SER_DSR;
sc->sc_msr |= SER_DSR;
msr |= SER_DSR;
*msr |= SER_DSR;
sc->sc_msr |= SER_DSR;
sc->sc_msr |= SER_DSR;
*p_msr |= SER_DSR;
sc->sc_msr |= SER_DSR;
if (sc->sc_msr & SER_DSR) {
sigon |= SER_DSR;
msr |= SER_DSR;
sc->sc_msr |= SER_DSR;
SIGCHG(1, sig, SER_DSR, SER_DDSR);
#define SER_DDSR SER_DELTA(SER_DSR)