To trace paired ttys we will need one more bitmap
so rename tty_test_and_set_index to tty_test_and_set
because we will need this helper in another context.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Acked-by: Andrew Vagin <avagin@parallels.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>