kqfd_register
ret = kqfd_register(ctx->kqueue_fd, &kev, ctx->hwt_td, M_WAITOK);
ret = kqfd_register(info->sc->kqueue_fd, &kev, info->sc->hwt_td,
ret = kqfd_register(ctx->kqueue_fd, &kev, ctx->hwt_td, M_WAITOK);
error = kqfd_register(kqfd, &kev, td, M_WAITOK);
error = kqfd_register(
int kqfd_register(int fd, struct kevent *kev, struct thread *p,