linux 2.6.23时钟中断与调度分析(4)

TIMER_INITIALIZER（）：
1):TIMER_INITIALIZER（）用来声明一个定时器，它的定义如下：
#define TIMER_INITIALIZER(_function, _expires, _data) {         \
                .function = (_function),                        \            
                .expires = (_expires),                          \
                .data = (_data),                                \
                .base = &boot_tvec_bases,                       \
        }
注：在上章对里面的数据结构已经解释过了
2): mod_timer():修改定时器的到时时间
int mod_timer(struct timer_list *timer, unsigned long expires)
{
    //如果该定时器没有定义fuction
        BUG_ON(!timer->function);
        timer_stats_timer_set_start_info(timer);
        /*
         * This is a common optimization triggered by the
         * networking code - if the timer is re-modified
   &nb