Symbol: tty_ldisc_failto
drivers/tty/tty_ldisc.c
494
if (tty_ldisc_failto(tty, old->ops->num) < 0) {
drivers/tty/tty_ldisc.c
503
if (tty_ldisc_failto(tty, N_TTY) < 0 &&
drivers/tty/tty_ldisc.c
504
tty_ldisc_failto(tty, N_NULL) < 0)