diff --git a/drivers/char/pty.c b/drivers/char/pty.c
index c5a192d..a391bad 100644
--- a/drivers/char/pty.c
+++ b/drivers/char/pty.c
@@ -60,7 +60,7 @@
 		set_bit(TTY_OTHER_CLOSED, &tty->flags);
 #ifdef CONFIG_UNIX98_PTYS
 		if (tty->driver == ptm_driver)
-			devpts_pty_kill(tty->index);
+			devpts_pty_kill(tty->link);
 #endif
 		tty_vhangup(tty->link);
 	}
@@ -453,9 +453,10 @@
  *	This provides our locking.
  */
 
-static struct tty_struct *ptm_unix98_lookup(struct tty_driver *driver, int idx)
+static struct tty_struct *ptm_unix98_lookup(struct tty_driver *driver,
+		struct inode *ptm_inode, int idx)
 {
-	struct tty_struct *tty = devpts_get_tty(idx);
+	struct tty_struct *tty = devpts_get_tty(ptm_inode, idx);
 	if (tty)
 		tty = tty->link;
 	return tty;
@@ -470,9 +471,10 @@
  *	This provides our locking.
  */
 
-static struct tty_struct *pts_unix98_lookup(struct tty_driver *driver, int idx)
+static struct tty_struct *pts_unix98_lookup(struct tty_driver *driver,
+		struct inode *pts_inode, int idx)
 {
-	struct tty_struct *tty = devpts_get_tty(idx);
+	struct tty_struct *tty = devpts_get_tty(pts_inode, idx);
 	/* Master must be open before slave */
 	if (!tty)
 		return ERR_PTR(-EIO);
@@ -602,7 +604,7 @@
 	nonseekable_open(inode, filp);
 
 	/* find a device that is not in use. */
-	index = devpts_new_index();
+	index = devpts_new_index(inode);
 	if (index < 0)
 		return index;
 
@@ -619,7 +621,7 @@
 	filp->private_data = tty;
 	file_move(filp, &tty->tty_files);
 
-	retval = devpts_pty_new(tty->link);
+	retval = devpts_pty_new(inode, tty->link);
 	if (retval)
 		goto out1;
 
@@ -630,7 +632,7 @@
 	tty_release_dev(filp);
 	return retval;
 out:
-	devpts_kill_index(index);
+	devpts_kill_index(inode, index);
 	return retval;
 }
 
diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c
index 36098ee..9590839 100644
--- a/drivers/char/tty_io.c
+++ b/drivers/char/tty_io.c
@@ -1213,12 +1213,13 @@
  *	be held until the 'fast-open' is also done. Will change once we
  *	have refcounting in the driver and per driver locking
  */
-struct tty_struct *tty_driver_lookup_tty(struct tty_driver *driver, int idx)
+struct tty_struct *tty_driver_lookup_tty(struct tty_driver *driver,
+		struct inode *inode, int idx)
 {
 	struct tty_struct *tty;
 
 	if (driver->ops->lookup)
-		return driver->ops->lookup(driver, idx);
+		return driver->ops->lookup(driver, inode, idx);
 
 	tty = driver->ttys[idx];
 	return tty;
@@ -1539,10 +1540,11 @@
 	int	devpts;
 	int	idx;
 	char	buf[64];
+	struct 	inode *inode;
 
+	inode = filp->f_path.dentry->d_inode;
 	tty = (struct tty_struct *)filp->private_data;
-	if (tty_paranoia_check(tty, filp->f_path.dentry->d_inode,
-							"tty_release_dev"))
+	if (tty_paranoia_check(tty, inode, "tty_release_dev"))
 		return;
 
 	check_tty_count(tty, "tty_release_dev");
@@ -1751,7 +1753,7 @@
 
 	/* Make this pty number available for reallocation */
 	if (devpts)
-		devpts_kill_index(idx);
+		devpts_kill_index(inode, idx);
 }
 
 /**
@@ -1836,7 +1838,7 @@
 got_driver:
 	if (!tty) {
 		/* check whether we're reopening an existing tty */
-		tty = tty_driver_lookup_tty(driver, index);
+		tty = tty_driver_lookup_tty(driver, inode, index);
 
 		if (IS_ERR(tty))
 			return PTR_ERR(tty);
diff --git a/fs/devpts/inode.c b/fs/devpts/inode.c
index 488eb42..638db9b 100644
--- a/fs/devpts/inode.c
+++ b/fs/devpts/inode.c
@@ -177,7 +177,7 @@
 	return lookup_one_len(s, root, sprintf(s, "%d", num));
 }
 
-int devpts_new_index(void)
+int devpts_new_index(struct inode *ptmx_inode)
 {
 	int index;
 	int ida_ret;
@@ -205,14 +205,14 @@
 	return index;
 }
 
-void devpts_kill_index(int idx)
+void devpts_kill_index(struct inode *ptmx_inode, int idx)
 {
 	mutex_lock(&allocated_ptys_lock);
 	ida_remove(&allocated_ptys, idx);
 	mutex_unlock(&allocated_ptys_lock);
 }
 
-int devpts_pty_new(struct tty_struct *tty)
+int devpts_pty_new(struct inode *ptmx_inode, struct tty_struct *tty)
 {
 	int number = tty->index; /* tty layer puts index from devpts_new_index() in here */
 	struct tty_driver *driver = tty->driver;
@@ -245,7 +245,7 @@
 	return 0;
 }
 
-struct tty_struct *devpts_get_tty(int number)
+struct tty_struct *devpts_get_tty(struct inode *pts_inode, int number)
 {
 	struct dentry *dentry = get_node(number);
 	struct tty_struct *tty;
@@ -262,8 +262,9 @@
 	return tty;
 }
 
-void devpts_pty_kill(int number)
+void devpts_pty_kill(struct tty_struct *tty)
 {
+	int number = tty->index;
 	struct dentry *dentry = get_node(number);
 
 	if (!IS_ERR(dentry)) {
diff --git a/include/linux/devpts_fs.h b/include/linux/devpts_fs.h
index 154769c..5ce0e5f 100644
--- a/include/linux/devpts_fs.h
+++ b/include/linux/devpts_fs.h
@@ -17,20 +17,31 @@
 
 #ifdef CONFIG_UNIX98_PTYS
 
-int devpts_new_index(void);
-void devpts_kill_index(int idx);
-int devpts_pty_new(struct tty_struct *tty);      /* mknod in devpts */
-struct tty_struct *devpts_get_tty(int number);	 /* get tty structure */
-void devpts_pty_kill(int number);		 /* unlink */
+int devpts_new_index(struct inode *ptmx_inode);
+void devpts_kill_index(struct inode *ptmx_inode, int idx);
+/* mknod in devpts */
+int devpts_pty_new(struct inode *ptmx_inode, struct tty_struct *tty);
+/* get tty structure */
+struct tty_struct *devpts_get_tty(struct inode *pts_inode, int number);
+/* unlink */
+void devpts_pty_kill(struct tty_struct *tty);
 
 #else
 
 /* Dummy stubs in the no-pty case */
-static inline int devpts_new_index(void) { return -EINVAL; }
-static inline void devpts_kill_index(int idx) { }
-static inline int devpts_pty_new(struct tty_struct *tty) { return -EINVAL; }
-static inline struct tty_struct *devpts_get_tty(int number) { return NULL; }
-static inline void devpts_pty_kill(int number) { }
+static inline int devpts_new_index(struct inode *ptmx_inode) { return -EINVAL; }
+static inline void devpts_kill_index(struct inode *ptmx_inode, int idx) { }
+static inline int devpts_pty_new(struct inode *ptmx_inode,
+				struct tty_struct *tty)
+{
+	return -EINVAL;
+}
+static inline struct tty_struct *devpts_get_tty(struct inode *pts_inode,
+		int number)
+{
+	return NULL;
+}
+static inline void devpts_pty_kill(struct tty_struct *tty) { }
 
 #endif
 
diff --git a/include/linux/tty_driver.h b/include/linux/tty_driver.h
index 005d06a..78416b9 100644
--- a/include/linux/tty_driver.h
+++ b/include/linux/tty_driver.h
@@ -225,7 +225,8 @@
 struct tty_driver;
 
 struct tty_operations {
-	struct tty_struct * (*lookup)(struct tty_driver *driver, int idx);
+	struct tty_struct * (*lookup)(struct tty_driver *driver,
+			struct inode *inode, int idx);
 	int  (*install)(struct tty_driver *driver, struct tty_struct *tty);
 	void (*remove)(struct tty_driver *driver, struct tty_struct *tty);
 	int  (*open)(struct tty_struct * tty, struct file * filp);