t_gen             208 kern/tty.c     	tp->t_gen++;
t_gen            2212 kern/tty.c     	gen = tp->t_gen;
t_gen            2215 kern/tty.c     	return (tp->t_gen == gen ? 0 : ERESTART);
t_gen             131 sys/tty.h      	short	t_gen;			/* Generation number. */