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TTY: move low_latency to tty_port

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One point is to have less places where we actually need tty pointer.
The other is that low_latency is bound to buffer processing and
buffers are now in tty_port. So it makes sense to move low_latency to
tty_port too.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jiri Slaby
2013-01-03 15:53:05 +01:00
committed by Greg Kroah-Hartman
parent 05c7cd3990
commit d6c53c0e9b
29 changed files with 42 additions and 41 deletions
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9
drivers/tty/tty_buffer.c
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@@ -364,7 +364,7 @@ void tty_schedule_flip(struct tty_struct *tty)
{
struct tty_bufhead *buf = &tty->port->buf;
unsigned long flags;
WARN_ON(tty->low_latency);
WARN_ON(tty->port->low_latency);
spin_lock_irqsave(&buf->lock, flags);
if (buf->tail != NULL)
@@ -538,7 +538,7 @@ static void flush_to_ldisc(struct work_struct *work)
*/
void tty_flush_to_ldisc(struct tty_struct *tty)
{
if (!tty->low_latency)
if (!tty->port->low_latency)
flush_work(&tty->port->buf.work);
}
@@ -547,7 +547,8 @@ void tty_flush_to_ldisc(struct tty_struct *tty)
* @tty: tty to push
*
* Queue a push of the terminal flip buffers to the line discipline. This
* function must not be called from IRQ context if tty->low_latency is set.
* function must not be called from IRQ context if port->low_latency is
* set.
*
* In the event of the queue being busy for flipping the work will be
* held off and retried later.
@@ -565,7 +566,7 @@ void tty_flip_buffer_push(struct tty_struct *tty)
buf->tail->commit = buf->tail->used;
spin_unlock_irqrestore(&buf->lock, flags);
if (tty->low_latency)
if (tty->port->low_latency)
flush_to_ldisc(&buf->work);
else
schedule_work(&buf->work);