2 files changed, 16 insertions, 0 deletions

diff --git a/include/linux/tty_driver.h b/include/linux/tty_driver.h
index 659487e3ebeb..85c95cd39bc3 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);
diff --git a/include/linux/tty_ldisc.h b/include/linux/tty_ldisc.h
index d75932e27710..6226504d9108 100644
--- a/include/linux/tty_ldisc.h
+++ b/include/linux/tty_ldisc.h
@@ -59,6 +59,11 @@
  *      low-level driver can "grab" an ioctl request before the line
  *      discpline has a chance to see it.
  * 
+ * long (*compat_ioctl)(struct tty_struct * tty, struct file * file,
+ *                      unsigned int cmd, unsigned long arg);
+ *
+ *      Process ioctl calls from 32-bit process on 64-bit system
+ *
  * void (*set_termios)(struct tty_struct *tty, struct ktermios * old);
  *
  *      This function notifies the line discpline that a change has
@@ -118,6 +123,8 @@ struct tty_ldisc {
                          const unsigned char * buf, size_t nr); 
         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);
         unsigned int (*poll)(struct tty_struct *, struct file *,
                              struct poll_table_struct *);