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| author | Peter Hurley <peter@hurleysoftware.com> | 2016-01-10 22:40:54 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-01-27 15:01:44 -0800 |
| commit | fdfb719e93b55a50f90da2059dc450e7c0c48e8f (patch) | |
| tree | 5317736293b5c7c16673df42d4542b78a70831aa /drivers/tty/cyclades.c | |
| parent | 582e20a03b9bcbddaeaffb38800323ddcc4a9173 (diff) | |
| download | lwn-fdfb719e93b55a50f90da2059dc450e7c0c48e8f.tar.gz lwn-fdfb719e93b55a50f90da2059dc450e7c0c48e8f.zip | |
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 <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/cyclades.c')
| -rw-r--r-- | drivers/tty/cyclades.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/tty/cyclades.c b/drivers/tty/cyclades.c index abbed201dc74..a48e7e66b970 100644 --- a/drivers/tty/cyclades.c +++ b/drivers/tty/cyclades.c @@ -2852,8 +2852,8 @@ static void cy_throttle(struct tty_struct *tty) unsigned long flags; #ifdef CY_DEBUG_THROTTLE - printk(KERN_DEBUG "cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty), - tty->ldisc.chars_in_buffer(tty), info->line); + printk(KERN_DEBUG "cyc:throttle %s ...ttyC%d\n", tty_name(tty), + info->line); #endif if (serial_paranoia_check(info, tty->name, "cy_throttle")) @@ -2891,8 +2891,8 @@ static void cy_unthrottle(struct tty_struct *tty) unsigned long flags; #ifdef CY_DEBUG_THROTTLE - printk(KERN_DEBUG "cyc:unthrottle %s: %ld...ttyC%d\n", - tty_name(tty), tty_chars_in_buffer(tty), info->line); + printk(KERN_DEBUG "cyc:unthrottle %s ...ttyC%d\n", + tty_name(tty), info->line); #endif if (serial_paranoia_check(info, tty->name, "cy_unthrottle")) |