From fdfb719e93b55a50f90da2059dc450e7c0c48e8f Mon Sep 17 00:00:00 2001 From: Peter Hurley Date: Sun, 10 Jan 2016 22:40:54 -0800 Subject: tty: Remove chars_in_buffer() line discipline method The chars_in_buffer() line discipline method serves no functional purpose, other than as a (dubious) debugging aid for mostly bit-rotting drivers. Despite being documented as an optional method, every caller is unconditionally executed (although conditionally compiled). Furthermore, direct tty->ldisc access without an ldisc ref is unsafe. Lastly, N_TTY's chars_in_buffer() has warned of removal since 3.12. Signed-off-by: Peter Hurley Signed-off-by: Greg Kroah-Hartman --- drivers/tty/rocket.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) (limited to 'drivers/tty/rocket.c') diff --git a/drivers/tty/rocket.c b/drivers/tty/rocket.c index 802eac7e561b..f624b93a237f 100644 --- a/drivers/tty/rocket.c +++ b/drivers/tty/rocket.c @@ -1360,8 +1360,7 @@ static void rp_throttle(struct tty_struct *tty) struct r_port *info = tty->driver_data; #ifdef ROCKET_DEBUG_THROTTLE - printk(KERN_INFO "throttle %s: %d....\n", tty->name, - tty->ldisc.chars_in_buffer(tty)); + printk(KERN_INFO "throttle %s ....\n", tty->name); #endif if (rocket_paranoia_check(info, "rp_throttle")) @@ -1377,8 +1376,7 @@ static void rp_unthrottle(struct tty_struct *tty) { struct r_port *info = tty->driver_data; #ifdef ROCKET_DEBUG_THROTTLE - printk(KERN_INFO "unthrottle %s: %d....\n", tty->name, - tty->ldisc.chars_in_buffer(tty)); + printk(KERN_INFO "unthrottle %s ....\n", tty->name); #endif if (rocket_paranoia_check(info, "rp_unthrottle")) -- cgit v1.2.3