1 files changed, 2 insertions, 0 deletions

diff --git a/include/linux/tty_ldisc.h b/include/linux/tty_ldisc.h
index ff7dc08696a8..fb79dd8d1537 100644
--- a/include/linux/tty_ldisc.h
+++ b/include/linux/tty_ldisc.h
@@ -110,6 +110,7 @@
 #include <linux/fs.h>
 #include <linux/wait.h>
 #include <linux/pps_kernel.h>
+#include <linux/wait.h>
 
 struct tty_ldisc_ops {
         int     magic;
@@ -154,6 +155,7 @@ struct tty_ldisc_ops {
 struct tty_ldisc {
         struct tty_ldisc_ops *ops;
         atomic_t users;
+        wait_queue_head_t wq_idle;
 };
 
 #define TTY_LDISC_MAGIC 0x5403