overrun          1125 dev/ic/z8530tty.c 	int ringmask, overrun;
overrun          1133 dev/ic/z8530tty.c 	overrun = 0;
overrun          1154 dev/ic/z8530tty.c 			overrun++;
overrun          1171 dev/ic/z8530tty.c 	if (overrun) {