tty: BKL pushdown

[safe/jmp/linux-2.6] / drivers / char / pty.c

diff --git a/drivers/char/pty.c b/drivers/char/pty.c
index 706ff34..6288356 100644 (file)
--- a/drivers/char/pty.c
+++ b/drivers/char/pty.c
@@ -181,6 +181,7 @@ static int pty_set_lock(struct tty_struct *tty, int __user * arg)
 static void pty_flush_buffer(struct tty_struct *tty)
 {
        struct tty_struct *to = tty->link;
+       unsigned long flags;
        
        if (!to)
                return;
@@ -189,8 +190,10 @@ static void pty_flush_buffer(struct tty_struct *tty)
                to->ldisc.flush_buffer(to);
        
        if (to->packet) {
+               spin_lock_irqsave(&tty->ctrl_lock, flags);
                tty->ctrl_status |= TIOCPKT_FLUSHWRITE;
                wake_up_interruptible(&to->read_wait);
+               spin_unlock_irqrestore(&tty->ctrl_lock, flags);
        }
 }