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tty: drop tty_schedule_flip()

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commit 5db96ef23bda6c2a61a51693c85b78b52d03f654 upstream.

Since commit a9c3f68f3c (tty: Fix low_latency BUG) in 2014,
tty_flip_buffer_push() is only a wrapper to tty_schedule_flip(). All
users were converted in the previous patches, so remove
tty_schedule_flip() completely while inlining its body into
tty_flip_buffer_push().

One less exported function.

Reviewed-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20211122111648.30379-4-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jiri Slaby 2021-11-22 12:16:48 +01:00 committed by Greg Kroah-Hartman
parent 4d374625cc
commit c84986d097
2 changed files with 8 additions and 23 deletions
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30
drivers/tty/tty_buffer.c
View File

@ -394,27 +394,6 @@ int __tty_insert_flip_char(struct tty_port *port, unsigned char ch, char flag)
}
EXPORT_SYMBOL(__tty_insert_flip_char);
/**
* tty_schedule_flip - push characters to ldisc
* @port: tty port to push from
*
* Takes any pending buffers and transfers their ownership to the
* ldisc side of the queue. It then schedules those characters for
* processing by the line discipline.
*/
void tty_schedule_flip(struct tty_port *port)
{
struct tty_bufhead *buf = &port->buf;
/* paired w/ acquire in flush_to_ldisc(); ensures
* flush_to_ldisc() sees buffer data.
*/
smp_store_release(&buf->tail->commit, buf->tail->used);
queue_work(system_unbound_wq, &buf->work);
}
EXPORT_SYMBOL(tty_schedule_flip);
/**
* tty_prepare_flip_string - make room for characters
* @port: tty port
@ -557,7 +536,14 @@ static void flush_to_ldisc(struct work_struct *work)
void tty_flip_buffer_push(struct tty_port *port)
{
tty_schedule_flip(port);
struct tty_bufhead *buf = &port->buf;
/*
* Paired w/ acquire in flush_to_ldisc(); ensures flush_to_ldisc() sees
* buffer data.
*/
smp_store_release(&buf->tail->commit, buf->tail->used);
queue_work(system_unbound_wq, &buf->work);
}
EXPORT_SYMBOL(tty_flip_buffer_push);

1
include/linux/tty_flip.h
View File

@ -12,7 +12,6 @@ extern int tty_insert_flip_string_fixed_flag(struct tty_port *port,
extern int tty_prepare_flip_string(struct tty_port *port,
unsigned char **chars, size_t size);
extern void tty_flip_buffer_push(struct tty_port *port);
void tty_schedule_flip(struct tty_port *port);
int __tty_insert_flip_char(struct tty_port *port, unsigned char ch, char flag);
static inline int tty_insert_flip_char(struct tty_port *port,