发布时间：2012-12-10 23:04:56
kill_fasync及fasync_helper用于异步通知中kill_fasync(&dev->async_queue, SIGIO, POLL_IN); //向app发可读信号，dev->async_queue可用来区分向谁发那个进程调用这个fasync_helper就向谁发int fasync_helper(int fd, struct file * filp, int on, struct fasync_struct **fapp){ struct fasync_struct *fa, **fp; &nbs......【阅读全文】
