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tty: Remove tty_port::close_wait

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With the removal of tty_wait_until_sent_from_close(), tty drivers
no longer wait during open for parallel closes to complete (instead,
the tty core waits before calling the driver open() method). Thus,
the close_wait waitqueue is no longer used for waiting.

Remove struct tty_port::close_wait.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Peter Hurley 2015-10-10 16:00:54 -04:00 committed by Greg Kroah-Hartman
parent b140dfe622
commit cc2aaabfd6
6 changed files with 0 additions and 7 deletions
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1
drivers/tty/rocket.c
View File

@ -1049,7 +1049,6 @@ static void rp_close(struct tty_struct *tty, struct file *filp)
mutex_unlock(&port->mutex);
tty_port_tty_set(port, NULL);
wake_up_interruptible(&port->close_wait);
complete_all(&info->close_wait);
atomic_dec(&rp_num_ports_open);

1
drivers/tty/serial/68328serial.c
View File

@ -1071,7 +1071,6 @@ static void rs_close(struct tty_struct *tty, struct file * filp)
wake_up_interruptible(&port->open_wait);
}
port->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
wake_up_interruptible(&port->close_wait);
local_irq_restore(flags);
}

1
drivers/tty/serial/crisv10.c
View File

@ -3655,7 +3655,6 @@ rs_close(struct tty_struct *tty, struct file * filp)
wake_up_interruptible(&info->port.open_wait);
}
info->port.flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
wake_up_interruptible(&info->port.close_wait);
local_irq_restore(flags);
/* port closed */

1
drivers/tty/serial/serial_core.c
View File

@ -1437,7 +1437,6 @@ static void uart_close(struct tty_struct *tty, struct file *filp)
clear_bit(ASYNCB_CLOSING, &port->flags);
spin_unlock_irq(&port->lock);
wake_up_interruptible(&port->open_wait);
wake_up_interruptible(&port->close_wait);
mutex_unlock(&port->mutex);

2
drivers/tty/tty_port.c
View File

@ -22,7 +22,6 @@ void tty_port_init(struct tty_port *port)
memset(port, 0, sizeof(*port));
tty_buffer_init(port);
init_waitqueue_head(&port->open_wait);
init_waitqueue_head(&port->close_wait);
init_waitqueue_head(&port->delta_msr_wait);
mutex_init(&port->mutex);
mutex_init(&port->buf_mutex);
@ -520,7 +519,6 @@ void tty_port_close_end(struct tty_port *port, struct tty_struct *tty)
wake_up_interruptible(&port->open_wait);
}
port->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
wake_up_interruptible(&port->close_wait);
spin_unlock_irqrestore(&port->lock, flags);
}
EXPORT_SYMBOL(tty_port_close_end);

1
include/linux/tty.h
View File

@ -227,7 +227,6 @@ struct tty_port {
int blocked_open; /* Waiting to open */
int count; /* Usage count */
wait_queue_head_t open_wait; /* Open waiters */
wait_queue_head_t close_wait; /* Close waiters */
wait_queue_head_t delta_msr_wait; /* Modem status change */
unsigned long flags; /* TTY flags ASY_*/
unsigned char console:1, /* port is a console */