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authorJiri Slaby <jslaby@suse.cz>2021-05-05 11:19:18 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2021-05-13 18:29:11 +0200
commitfa7501e57e9bf869cb6718a2699f05fc2807cbf1 (patch)
tree40c54de40b1c5518536b80b11d21f2a776170c11 /arch/alpha
parent9a33fbf9d23034d7e89849c587b0aed0e4cf794d (diff)
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 'arch/alpha')
-rw-r--r--arch/alpha/kernel/srmcons.c7
1 files changed, 0 insertions, 7 deletions
diff --git a/arch/alpha/kernel/srmcons.c b/arch/alpha/kernel/srmcons.c
index 2110b7e7f988..fc03471a0b0f 100644
--- a/arch/alpha/kernel/srmcons.c
+++ b/arch/alpha/kernel/srmcons.c
@@ -149,12 +149,6 @@ srmcons_write_room(struct tty_struct *tty)
}
static int
-srmcons_chars_in_buffer(struct tty_struct *tty)
-{
- return 0;
-}
-
-static int
srmcons_open(struct tty_struct *tty, struct file *filp)
{
struct srmcons_private *srmconsp = &srmcons_singleton;
@@ -200,7 +194,6 @@ static const struct tty_operations srmcons_ops = {
.close = srmcons_close,
.write = srmcons_write,
.write_room = srmcons_write_room,
- .chars_in_buffer= srmcons_chars_in_buffer,
};
static int __init