From fa7501e57e9bf869cb6718a2699f05fc2807cbf1 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Wed, 5 May 2021 11:19:18 +0200 Subject: 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 Cc: Richard Henderson Acked-by: Max Filippov # xtensa Cc: Ivan Kokshaysky Cc: Matt Turner Cc: "James E.J. Bottomley" Cc: Helge Deller Cc: Chris Zankel Cc: Heiko Carstens Cc: Vasily Gorbik Cc: Christian Borntraeger Link: https://lore.kernel.org/r/20210505091928.22010-26-jslaby@suse.cz Signed-off-by: Greg Kroah-Hartman --- arch/xtensa/platforms/iss/console.c | 7 ------- 1 file changed, 7 deletions(-) (limited to 'arch/xtensa/platforms') diff --git a/arch/xtensa/platforms/iss/console.c b/arch/xtensa/platforms/iss/console.c index 98ac3a7fdb0a..21184488c277 100644 --- a/arch/xtensa/platforms/iss/console.c +++ b/arch/xtensa/platforms/iss/console.c @@ -106,12 +106,6 @@ static unsigned int rs_write_room(struct tty_struct *tty) return 2 * 1024; } -static int rs_chars_in_buffer(struct tty_struct *tty) -{ - /* the iss doesn't buffer characters */ - return 0; -} - static void rs_hangup(struct tty_struct *tty) { /* Stub, once again.. */ @@ -135,7 +129,6 @@ static const struct tty_operations serial_ops = { .put_char = rs_put_char, .flush_chars = rs_flush_chars, .write_room = rs_write_room, - .chars_in_buffer = rs_chars_in_buffer, .hangup = rs_hangup, .wait_until_sent = rs_wait_until_sent, .proc_show = rs_proc_show, -- cgit v1.2.3