kern_poll
return (kern_poll(td, uap->fds, uap->nfds, tsp, ssp));
return (kern_poll(td, uap->fds, uap->nfds, tsp, NULL));
return (kern_poll(td, uap->fds, uap->nfds, tsp, ssp));
int kern_poll(struct thread *td, struct pollfd *fds, u_int nfds,