check_timer(timer);
void add_timer_on(struct timer_list *timer, int cpu){	tvec_base_t *base = &per_cpu(tvec_bases, cpu);  	unsigned long flags;  	BUG_ON(timer_pending(timer) || !timer->function);	check_timer(timer);	spin_lock_irqsave(&base->t_base.lock, flags);	timer->base = &base->t_base;	internal_add_timer(base, timer);	spin_unlock_irqrestore(&base->t_base.lock, flags);}