reschedule_signals
static void reschedule_signals(struct proc *p, sigset_t block, int flags);
reschedule_signals(p, new_block, flags);
reschedule_signals(p, new_block, 0);
reschedule_signals(p, unblocked, 0);
reschedule_signals(p, td->td_sigmask, 0);
reschedule_signals(p, fastblock_mask, SIGPROCMASK_FASTBLK);