1 files changed, 10 insertions, 3 deletions

diff --git a/include/linux/tty_driver.h b/include/linux/tty_driver.h
index 0bd31f0830f9..58c961c9e170 100644
--- a/include/linux/tty_driver.h
+++ b/include/linux/tty_driver.h
@@ -241,8 +241,15 @@ void tty_set_operations(struct tty_driver *driver, struct tty_operations *op);
  *      is also a promise, if the above case is true, not to signal
  *      overruns, either.)
  *
- * TTY_DRIVER_NO_DEVFS --- if set, do not create devfs entries. This
- *      is only used by tty_register_driver().
+ * TTY_DRIVER_DYNAMIC_DEV --- if set, the individual tty devices need
+ *      to be registered with a call to tty_register_driver() when the
+ *      device is found in the system and unregistered with a call to
+ *      tty_unregister_device() so the devices will be show up
+ *      properly in sysfs.  If not set, driver->num entries will be
+ *      created by the tty core in sysfs when tty_register_driver() is
+ *      called.  This is to be used by drivers that have tty devices
+ *      that can appear and disappear while the main tty driver is
+ *      registered with the tty core.
  *
  * TTY_DRIVER_DEVPTS_MEM -- don't use the standard arrays, instead
  *      use dynamic memory keyed through the devpts filesystem.  This
@@ -251,7 +258,7 @@ void tty_set_operations(struct tty_driver *driver, struct tty_operations *op);
 #define TTY_DRIVER_INSTALLED            0x0001
 #define TTY_DRIVER_RESET_TERMIOS        0x0002
 #define TTY_DRIVER_REAL_RAW             0x0004
-#define TTY_DRIVER_NO_DEVFS             0x0008
+#define TTY_DRIVER_DYNAMIC_DEV          0x0008
 #define TTY_DRIVER_DEVPTS_MEM           0x0010
 
 /* tty driver types */