Linux Device Driver
列印時間
如下：
void print_time(void)
{
struct timeval t;
struct tm broken;
do_gettimeofday(&t);
time_to_tm(t.tv_sec, 0, &broken);
printk("%d:%d:%d:%ld\n", broken.tm_hour, broken.tm_min, broken.tm_sec, t.tv_usec);
}