epoll keyed wakeups: make tty use keyed wakeups

Introduce keyed event wakeups inside the TTY code. Signed-off-by: Davide Libenzi <[email protected]> Cc: Alan Cox <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: David Miller <[email protected]> Cc: William Lee Irwin III <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
mgowda · Apr 1, 2009 · 4b19449 · 4b19449
1 parent 3951088
commit 4b19449
Showing 1 changed file with 10 additions and 10 deletions.
diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c
@@ -464,7 +464,7 @@ void tty_wakeup(struct tty_struct *tty)
 			tty_ldisc_deref(ld);
 		}
 	}
-	wake_up_interruptible(&tty->write_wait);
+	wake_up_interruptible_poll(&tty->write_wait, POLLOUT);
 }
 
 EXPORT_SYMBOL_GPL(tty_wakeup);
@@ -587,8 +587,8 @@ static void do_tty_hangup(struct work_struct *work)
 	 * FIXME: Once we trust the LDISC code better we can wait here for
 	 * ldisc completion and fix the driver call race
 	 */
-	wake_up_interruptible(&tty->write_wait);
-	wake_up_interruptible(&tty->read_wait);
+	wake_up_interruptible_poll(&tty->write_wait, POLLOUT);
+	wake_up_interruptible_poll(&tty->read_wait, POLLIN);
 	/*
 	 * Shutdown the current line discipline, and reset it to
 	 * N_TTY.
@@ -879,7 +879,7 @@ void stop_tty(struct tty_struct *tty)
 	if (tty->link && tty->link->packet) {
 		tty->ctrl_status &= ~TIOCPKT_START;
 		tty->ctrl_status |= TIOCPKT_STOP;
-		wake_up_interruptible(&tty->link->read_wait);
+		wake_up_interruptible_poll(&tty->link->read_wait, POLLIN);
 	}
 	spin_unlock_irqrestore(&tty->ctrl_lock, flags);
 	if (tty->ops->stop)
@@ -913,7 +913,7 @@ void start_tty(struct tty_struct *tty)
 	if (tty->link && tty->link->packet) {
 		tty->ctrl_status &= ~TIOCPKT_STOP;
 		tty->ctrl_status |= TIOCPKT_START;
-		wake_up_interruptible(&tty->link->read_wait);
+		wake_up_interruptible_poll(&tty->link->read_wait, POLLIN);
 	}
 	spin_unlock_irqrestore(&tty->ctrl_lock, flags);
 	if (tty->ops->start)
@@ -970,7 +970,7 @@ static ssize_t tty_read(struct file *file, char __user *buf, size_t count,
 void tty_write_unlock(struct tty_struct *tty)
 {
 	mutex_unlock(&tty->atomic_write_lock);
-	wake_up_interruptible(&tty->write_wait);
+	wake_up_interruptible_poll(&tty->write_wait, POLLOUT);
 }
 
 int tty_write_lock(struct tty_struct *tty, int ndelay)
@@ -1623,21 +1623,21 @@ void tty_release_dev(struct file *filp)
 
 		if (tty_closing) {
 			if (waitqueue_active(&tty->read_wait)) {
-				wake_up(&tty->read_wait);
+				wake_up_poll(&tty->read_wait, POLLIN);
 				do_sleep++;
 			}
 			if (waitqueue_active(&tty->write_wait)) {
-				wake_up(&tty->write_wait);
+				wake_up_poll(&tty->write_wait, POLLOUT);
 				do_sleep++;
 			}
 		}
 		if (o_tty_closing) {
 			if (waitqueue_active(&o_tty->read_wait)) {
-				wake_up(&o_tty->read_wait);
+				wake_up_poll(&o_tty->read_wait, POLLIN);
 				do_sleep++;
 			}
 			if (waitqueue_active(&o_tty->write_wait)) {
-				wake_up(&o_tty->write_wait);
+				wake_up_poll(&o_tty->write_wait, POLLOUT);
 				do_sleep++;
 			}
 		}