tty: Fix unsafe bit ops in tty_throttle_safe/unthrottle_safe

tty->flags needs to be atomically modified.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/tty/tty_ioctl.c b/drivers/tty/tty_ioctl.c
index d119034877de..3500d4114147 100644
--- a/drivers/tty/tty_ioctl.c
+++ b/drivers/tty/tty_ioctl.c
@@ -156,7 +156,7 @@ int tty_throttle_safe(struct tty_struct *tty)
                 if (tty->flow_change != TTY_THROTTLE_SAFE)
                         ret = 1;
                 else {
-                        __set_bit(TTY_THROTTLED, &tty->flags);
+                        set_bit(TTY_THROTTLED, &tty->flags);
                         if (tty->ops->throttle)
                                 tty->ops->throttle(tty);
                 }
@@ -187,7 +187,7 @@ int tty_unthrottle_safe(struct tty_struct *tty)
                 if (tty->flow_change != TTY_UNTHROTTLE_SAFE)
                         ret = 1;
                 else {
-                        __clear_bit(TTY_THROTTLED, &tty->flags);
+                        clear_bit(TTY_THROTTLED, &tty->flags);
                         if (tty->ops->unthrottle)
                                 tty->ops->unthrottle(tty);
                 }