1 files changed, 7 insertions, 39 deletions

diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c
index 95908396102..502cad68f83 100644
--- a/drivers/char/tty_io.c
+++ b/drivers/char/tty_io.c
@@ -1235,27 +1235,20 @@ struct tty_struct *tty_driver_lookup_tty(struct tty_driver *driver,
 
 int tty_init_termios(struct tty_struct *tty)
 {
-	struct ktermios *tp, *ltp;
+	struct ktermios *tp;
 	int idx = tty->index;
 
 	tp = tty->driver->termios[idx];
-	ltp = tty->driver->termios_locked[idx];
 	if (tp == NULL) {
-		WARN_ON(ltp != NULL);
-		tp = kmalloc(sizeof(struct ktermios), GFP_KERNEL);
-		ltp = kzalloc(sizeof(struct ktermios), GFP_KERNEL);
-		if (tp == NULL || ltp == NULL) {
-			kfree(tp);
-			kfree(ltp);
+		tp = kzalloc(sizeof(struct ktermios[2]), GFP_KERNEL);
+		if (tp == NULL)
 			return -ENOMEM;
-		}
 		memcpy(tp, &tty->driver->init_termios,
 						sizeof(struct ktermios));
 		tty->driver->termios[idx] = tp;
-		tty->driver->termios_locked[idx] = ltp;
 	}
 	tty->termios = tp;
-	tty->termios_locked = ltp;
+	tty->termios_locked = tp + 1;
 
 	/* Compatibility until drivers always set this */
 	tty->termios->c_ispeed = tty_termios_input_baud_rate(tty->termios);
@@ -1439,10 +1432,6 @@ void tty_free_termios(struct tty_struct *tty)
 		tp = tty->termios;
 		tty->driver->termios[idx] = NULL;
 		kfree(tp);
-
-		tp = tty->termios_locked;
-		tty->driver->termios_locked[idx] = NULL;
-		kfree(tp);
 	}
 }
 EXPORT_SYMBOL(tty_free_termios);
@@ -1575,12 +1564,6 @@ void tty_release_dev(struct file *filp)
 			       idx, tty->name);
 			return;
 		}
-		if (tty->termios_locked != tty->driver->termios_locked[idx]) {
-			printk(KERN_DEBUG "tty_release_dev: driver.termios_locked[%d] not "
-			       "termios_locked for (%s)\n",
-			       idx, tty->name);
-			return;
-		}
 	}
 #endif
 
@@ -1604,13 +1587,6 @@ void tty_release_dev(struct file *filp)
 			       idx, tty->name);
 			return;
 		}
-		if (o_tty->termios_locked !=
-		      tty->driver->other->termios_locked[idx]) {
-			printk(KERN_DEBUG "tty_release_dev: other->termios_locked["
-					  "%d] not o_termios_locked for (%s)\n",
-			       idx, tty->name);
-			return;
-		}
 		if (o_tty->link != tty) {
 			printk(KERN_DEBUG "tty_release_dev: bad pty pointers\n");
 			return;
@@ -2930,18 +2906,13 @@ static void destruct_tty_driver(struct kref *kref)
 				driver->termios[i] = NULL;
 				kfree(tp);
 			}
-			tp = driver->termios_locked[i];
-			if (tp) {
-				driver->termios_locked[i] = NULL;
-				kfree(tp);
-			}
 			if (!(driver->flags & TTY_DRIVER_DYNAMIC_DEV))
 				tty_unregister_device(driver, i);
 		}
 		p = driver->ttys;
 		proc_tty_unregister_driver(driver);
 		driver->ttys = NULL;
-		driver->termios = driver->termios_locked = NULL;
+		driver->termios = NULL;
 		kfree(p);
 		cdev_del(&driver->cdev);
 	}
@@ -2978,7 +2949,7 @@ int tty_register_driver(struct tty_driver *driver)
 	void **p = NULL;
 
 	if (!(driver->flags & TTY_DRIVER_DEVPTS_MEM) && driver->num) {
-		p = kzalloc(driver->num * 3 * sizeof(void *), GFP_KERNEL);
+		p = kzalloc(driver->num * 2 * sizeof(void *), GFP_KERNEL);
 		if (!p)
 			return -ENOMEM;
 	}
@@ -3002,12 +2973,9 @@ int tty_register_driver(struct tty_driver *driver)
 	if (p) {
 		driver->ttys = (struct tty_struct **)p;
 		driver->termios = (struct ktermios **)(p + driver->num);
-		driver->termios_locked = (struct ktermios **)
-							(p + driver->num * 2);
 	} else {
 		driver->ttys = NULL;
 		driver->termios = NULL;
-		driver->termios_locked = NULL;
 	}
 
 	cdev_init(&driver->cdev, &tty_fops);
@@ -3016,7 +2984,7 @@ int tty_register_driver(struct tty_driver *driver)
 	if (error) {
 		unregister_chrdev_region(dev, driver->num);
 		driver->ttys = NULL;
-		driver->termios = driver->termios_locked = NULL;
+		driver->termios = NULL;
 		kfree(p);
 		return error;
 	}