tty: Deprecate ldisc .chars_in_buffer() method

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c
index 594a3c1..290769c 100644 (file)
--- a/drivers/tty/n_tty.c
+++ b/drivers/tty/n_tty.c
@@ -297,6 +297,7 @@ static ssize_t chars_in_buffer(struct tty_struct *tty)
 
 static ssize_t n_tty_chars_in_buffer(struct tty_struct *tty)
 {
+       WARN_ONCE(1, "%s is deprecated and scheduled for removal.", __func__);
        return chars_in_buffer(tty);
 }