Linux内核延时

微秒级延时用udelay.
毫秒级延时mdelay()


对于毫秒级或者更大延时推荐用：
头文件<linux/delay.h>

  46void msleep(unsigned int msecs);


  47unsigned long msleep_interruptible(unsigned int msecs);


  48void usleep_range(unsigned long min, unsigned long max);



  49
  50static inline void ssleep(unsigned int seconds)
  51{
  52        msleep(seconds * 1000);
  53}
  54