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| author | Peter Hurley | 2016-01-11 07:40:54 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2016-01-28 00:01:44 +0100 |
| commit | fdfb719e93b55a50f90da2059dc450e7c0c48e8f (patch) | |
| tree | 5317736293b5c7c16673df42d4542b78a70831aa /Documentation/serial/tty.txt | |
| parent | NFC: nci: Remove dead code (diff) | |
| download | kernel-qcow2-linux-fdfb719e93b55a50f90da2059dc450e7c0c48e8f.tar.gz kernel-qcow2-linux-fdfb719e93b55a50f90da2059dc450e7c0c48e8f.tar.xz kernel-qcow2-linux-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 'Documentation/serial/tty.txt')
| -rw-r--r-- | Documentation/serial/tty.txt | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/Documentation/serial/tty.txt b/Documentation/serial/tty.txt index bc3842dc323a..798cba82c762 100644 --- a/Documentation/serial/tty.txt +++ b/Documentation/serial/tty.txt @@ -72,9 +72,6 @@ flush_buffer() - (optional) May be called at any point between open and close, and instructs the line discipline to empty its input buffer. -chars_in_buffer() - (optional) Report the number of bytes in the input - buffer. - set_termios() - (optional) Called on termios structure changes. The caller passes the old termios data and the current data is in the tty. Called under the |