270 static u16 x_old[MAX_CONTACTS + 1] = {0};  variable
646 		x_old[id] = x;  in filter_point()
650 	x_err = x > x_old[id] ? (x - x_old[id]) : (x_old[id] - x);  in filter_point()
674 	x_new = x > x_old[id] ? (x_old[id] + filter_step_x) : (x_old[id] - filter_step_x);  in filter_point()
677 	x_old[id] = x_new;  in filter_point()
689 		x_old[id] = x;  in record_point()
693 	x = (x_old[id] + x) / 2;  in record_point()
696 	if (x > x_old[id])  in record_point()
697 		x_err = x - x_old[id];  in record_point()
699 		x_err = x_old[id] - x;  in record_point()
708 		x_old[id] = x;  in record_point()
714 			x_old[id] = x;  in record_point()
716 			x_new = x_old[id];  in record_point()
727 		x_new = x_old[id];  in record_point()