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| author | Jiri Slaby <jslaby@suse.cz> | 2021-05-05 11:19:18 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-05-13 18:29:11 +0200 |
| commit | fa7501e57e9bf869cb6718a2699f05fc2807cbf1 (patch) | |
| tree | 40c54de40b1c5518536b80b11d21f2a776170c11 /drivers/s390 | |
| parent | 9a33fbf9d23034d7e89849c587b0aed0e4cf794d (diff) | |
| download | linux-fa7501e57e9bf869cb6718a2699f05fc2807cbf1.tar.gz linux-fa7501e57e9bf869cb6718a2699f05fc2807cbf1.tar.bz2 linux-fa7501e57e9bf869cb6718a2699f05fc2807cbf1.zip | |
tty: remove tty_operations::chars_in_buffer for non-buffering
The only user of tty_ops::chars_in_buffer is tty_chars_in_buffer. And it
considers tty_ops::chars_in_buffer optional. In case it's NULL, zero is
returned. So remove all those chars_in_buffer from tty_ops which return
zero. (Zero means such driver doesn't buffer.)
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Richard Henderson <rth@twiddle.net>
Acked-by: Max Filippov <jcmvbkbc@gmail.com> # xtensa
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Matt Turner <mattst88@gmail.com>
Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Chris Zankel <chris@zankel.net>
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/20210505091928.22010-26-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/s390')
| -rw-r--r-- | drivers/s390/char/tty3270.c | 12 |
1 files changed, 0 insertions, 12 deletions
diff --git a/drivers/s390/char/tty3270.c b/drivers/s390/char/tty3270.c index 82d4c961ed06..ba1fbce63fee 100644 --- a/drivers/s390/char/tty3270.c +++ b/drivers/s390/char/tty3270.c @@ -1756,17 +1756,6 @@ tty3270_flush_chars(struct tty_struct *tty) } } -/* - * Returns the number of characters in the output buffer. This is - * used in tty_wait_until_sent to wait until all characters have - * appeared on the screen. - */ -static int -tty3270_chars_in_buffer(struct tty_struct *tty) -{ - return 0; -} - static void tty3270_flush_buffer(struct tty_struct *tty) { @@ -1892,7 +1881,6 @@ static const struct tty_operations tty3270_ops = { .put_char = tty3270_put_char, .flush_chars = tty3270_flush_chars, .write_room = tty3270_write_room, - .chars_in_buffer = tty3270_chars_in_buffer, .flush_buffer = tty3270_flush_buffer, .throttle = tty3270_throttle, .unthrottle = tty3270_unthrottle, |