390 filt_apmrdetach(struct knote *kn)  in filt_apmrdetach()  argument
392 	struct apm_softc *sc = (struct apm_softc *)kn->kn_hook;  in filt_apmrdetach()
395 	selremove_knote(&sc->sc_rsel, kn);  in filt_apmrdetach()
400 filt_apmread(struct knote *kn, long hint)  in filt_apmread()  argument
402 	struct apm_softc *sc = kn->kn_hook;  in filt_apmread()
404 	kn->kn_data = sc->event_count;  in filt_apmread()
405 	return (kn->kn_data > 0);  in filt_apmread()
416 apmkqfilter(dev_t dev, struct knote *kn)  in apmkqfilter()  argument
420 	switch (kn->kn_filter) {  in apmkqfilter()
422 		kn->kn_fop = &apmread_filtops;  in apmkqfilter()
428 	kn->kn_hook = sc;  in apmkqfilter()
431 	selrecord_knote(&sc->sc_rsel, kn);  in apmkqfilter()