1 files changed, 11 insertions, 2 deletions

diff --git a/include/linux/tty_driver.h b/include/linux/tty_driver.h
index 3566129384a4..b08677982525 100644
--- a/include/linux/tty_driver.h
+++ b/include/linux/tty_driver.h
@@ -45,8 +45,16 @@
  *
  * void (*shutdown)(struct tty_struct * tty);
  *
- *      This routine is called when a particular tty device is closed for
- *      the last time freeing up the resources.
+ *      This routine is called synchronously when a particular tty device
+ *      is closed for the last time freeing up the resources.
+ *
+ *
+ * void (*cleanup)(struct tty_struct * tty);
+ *
+ *      This routine is called asynchronously when a particular tty device
+ *      is closed for the last time freeing up the resources. This is
+ *      actually the second part of shutdown for routines that might sleep.
+ *
  *
  * int (*write)(struct tty_struct * tty,
  *               const unsigned char *buf, int count);
@@ -233,6 +241,7 @@ struct tty_operations {
         int  (*open)(struct tty_struct * tty, struct file * filp);
         void (*close)(struct tty_struct * tty, struct file * filp);
         void (*shutdown)(struct tty_struct *tty);
+        void (*cleanup)(struct tty_struct *tty);
         int  (*write)(struct tty_struct * tty,
                       const unsigned char *buf, int count);
         int  (*put_char)(struct tty_struct *tty, unsigned char ch);