ttylocked
KASSERT(ttylocked(sc->sc_tty));
KASSERT(ttylocked(sc->sc_tty));
KASSERT(ttylocked(tp));
KASSERT(ttylocked(tp));
KASSERT(ttylocked(tp));
#define tty_locked(tp) KASSERT(ttylocked(tp))
KASSERT(ttylocked(tp));
KASSERT(ttylocked(tp));
KASSERT(ttylocked(tp));
KASSERT(ttylocked(tp));
bool ttylocked(struct tty *);