diff --git a/drivers/tty/tty_buffer.c b/drivers/tty/tty_buffer.c
index cf78d19..143deb6 100644
--- a/drivers/tty/tty_buffer.c
+++ b/drivers/tty/tty_buffer.c
@@ -60,6 +60,7 @@
 	atomic_inc(&buf->priority);
 	mutex_lock(&buf->lock);
 }
+EXPORT_SYMBOL_GPL(tty_buffer_lock_exclusive);
 
 void tty_buffer_unlock_exclusive(struct tty_port *port)
 {
@@ -73,6 +74,7 @@
 	if (restart)
 		queue_work(system_unbound_wq, &buf->work);
 }
+EXPORT_SYMBOL_GPL(tty_buffer_unlock_exclusive);
 
 /**
  *	tty_buffer_space_avail	-	return unused buffer space