354 } sysfilt_ops[EVFILT_SYSCOUNT] = {  variable
1419 	if (sysfilt_ops[~filt].for_fop != &null_filtops &&  in kqueue_add_filteropts()
1420 	    sysfilt_ops[~filt].for_fop != NULL)  in kqueue_add_filteropts()
1423 		sysfilt_ops[~filt].for_fop = filtops;  in kqueue_add_filteropts()
1424 		sysfilt_ops[~filt].for_refcnt = 0;  in kqueue_add_filteropts()
1441 	if (sysfilt_ops[~filt].for_fop == &null_filtops ||  in kqueue_del_filteropts()
1442 	    sysfilt_ops[~filt].for_fop == NULL)  in kqueue_del_filteropts()
1444 	else if (sysfilt_ops[~filt].for_refcnt != 0)  in kqueue_del_filteropts()
1447 		sysfilt_ops[~filt].for_fop = &null_filtops;  in kqueue_del_filteropts()
1448 		sysfilt_ops[~filt].for_refcnt = 0;  in kqueue_del_filteropts()
1462 	if (sysfilt_ops[~filt].for_nolock)  in kqueue_fo_find()
1463 		return sysfilt_ops[~filt].for_fop;  in kqueue_fo_find()
1466 	sysfilt_ops[~filt].for_refcnt++;  in kqueue_fo_find()
1467 	if (sysfilt_ops[~filt].for_fop == NULL)  in kqueue_fo_find()
1468 		sysfilt_ops[~filt].for_fop = &null_filtops;  in kqueue_fo_find()
1471 	return sysfilt_ops[~filt].for_fop;  in kqueue_fo_find()
1481 	if (sysfilt_ops[~filt].for_nolock)  in kqueue_fo_release()
1485 	KASSERT(sysfilt_ops[~filt].for_refcnt > 0,  in kqueue_fo_release()
1487 	sysfilt_ops[~filt].for_refcnt--;  in kqueue_fo_release()