1 files changed, 9 insertions, 0 deletions

diff --git a/include/linux/tty_driver.h b/include/linux/tty_driver.h
index 659487e3ebe..85c95cd39bc 100644
--- a/include/linux/tty_driver.h
+++ b/include/linux/tty_driver.h
@@ -52,6 +52,11 @@
  *      This routine allows the tty driver to implement
  *      device-specific ioctl's.  If the ioctl number passed in cmd
  *      is not recognized by the driver, it should return ENOIOCTLCMD.
+ *
+ * long (*compat_ioctl)(struct tty_struct *tty, struct file * file,
+ *                      unsigned int cmd, unsigned long arg);
+ *
+ *      implement ioctl processing for 32 bit process on 64 bit system
  * 
  * void (*set_termios)(struct tty_struct *tty, struct ktermios * old);
  *
@@ -132,6 +137,8 @@ struct tty_operations {
         int  (*chars_in_buffer)(struct tty_struct *tty);
         int  (*ioctl)(struct tty_struct *tty, struct file * file,
                     unsigned int cmd, unsigned long arg);
+        long (*compat_ioctl)(struct tty_struct *tty, struct file * file,
+                             unsigned int cmd, unsigned long arg);
         void (*set_termios)(struct tty_struct *tty, struct ktermios * old);
         void (*throttle)(struct tty_struct * tty);
         void (*unthrottle)(struct tty_struct * tty);
@@ -193,6 +200,8 @@ struct tty_driver {
         int  (*chars_in_buffer)(struct tty_struct *tty);
         int  (*ioctl)(struct tty_struct *tty, struct file * file,
                     unsigned int cmd, unsigned long arg);
+        long (*compat_ioctl)(struct tty_struct *tty, struct file * file,
+                             unsigned int cmd, unsigned long arg);
         void (*set_termios)(struct tty_struct *tty, struct ktermios * old);
         void (*throttle)(struct tty_struct * tty);
         void (*unthrottle)(struct tty_struct * tty);