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tty: remove empty tty_operations::flush_buffer 

tty_operations::flush_buffer is optional. If it doesn't exist, nothing
is called. So remove almost¹ empty flush_buffer implementations.

¹ capi had an useless pr_debug in it.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Karsten Keil <isdn@linux-pingi.de>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Link: https://lore.kernel.org/r/20210505091928.22010-31-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jiri Slaby 2021-05-05 11:19:23 +02:00 committed by Greg Kroah-Hartman
parent 3d18354248
commit 4fb266e197
2 changed files with 0 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/isdn/capi/capi.c
View File

@ -1249,11 +1249,6 @@ static int capinc_tty_break_ctl(struct tty_struct *tty, int state)
return 0;
}
static void capinc_tty_flush_buffer(struct tty_struct *tty)
{
pr_debug("capinc_tty_flush_buffer\n");
}
static void capinc_tty_set_ldisc(struct tty_struct *tty)
{
pr_debug("capinc_tty_set_ldisc\n");
@ -1279,7 +1274,6 @@ static const struct tty_operations capinc_ops = {
.start = capinc_tty_start,
.hangup = capinc_tty_hangup,
.break_ctl = capinc_tty_break_ctl,
.flush_buffer = capinc_tty_flush_buffer,
.set_ldisc = capinc_tty_set_ldisc,
.send_xchar = capinc_tty_send_xchar,
.install = capinc_tty_install,

6
drivers/s390/char/tty3270.c
View File

@ -1756,11 +1756,6 @@ tty3270_flush_chars(struct tty_struct *tty)
}
}
static void
tty3270_flush_buffer(struct tty_struct *tty)
{
}
/*
* Check for visible/invisible input switches
*/
@ -1881,7 +1876,6 @@ static const struct tty_operations tty3270_ops = {
.put_char = tty3270_put_char,
.flush_chars = tty3270_flush_chars,
.write_room = tty3270_write_room,
.flush_buffer = tty3270_flush_buffer,
.throttle = tty3270_throttle,
.unthrottle = tty3270_unthrottle,
.hangup = tty3270_hangup,