signal_wake_up
signal_wake_up(t, 1);
signal_wake_up(task, false);
signal_wake_up(p, 0);
signal_wake_up(t, 1);
signal_wake_up(t, sig == SIGKILL);
signal_wake_up(t, 0);
signal_wake_up(t, 1);
signal_wake_up(t, 0);
signal_wake_up(t, 0);