TTY: pty, fix compilation warning

When CONFIG_UNIX98_PTYS is unset, we see this warning in pty:
  drivers/tty/pty.c:409:13: warning: ‘pty_unix98_shutdown’ defined but not used

Fix that by moving the function to a section which depends on that
config.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Reported-by: Toralf Foerster <toralf.foerster@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 6 insertions, 6 deletions

diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c
index 71e456aa6367..a62798fcc014 100644
--- a/drivers/tty/pty.c
+++ b/drivers/tty/pty.c
@@ -405,12 +405,6 @@ err:
         return retval;
 }
 
-/* this is called once with whichever end is closed last */
-static void pty_unix98_shutdown(struct tty_struct *tty)
-{
-        devpts_kill_index(tty->driver_data, tty->index);
-}
-
 static void pty_cleanup(struct tty_struct *tty)
 {
         tty_port_put(tty->port);
@@ -626,6 +620,12 @@ static void pty_unix98_remove(struct tty_driver *driver, struct tty_struct *tty)
 {
 }
 
+/* this is called once with whichever end is closed last */
+static void pty_unix98_shutdown(struct tty_struct *tty)
+{
+        devpts_kill_index(tty->driver_data, tty->index);
+}
+
 static const struct tty_operations ptm_unix98_ops = {
         .lookup = ptm_unix98_lookup,
         .install = pty_unix98_install,