摘要：
poll的作用：同时探测n个drivers，找到可以直接使用的driver，从而尽量block进程。以下kernel源代码来自于：<linux/poll.h> 与 fs/select.cstatic unsigned int scull_p_poll(struct file *filp, poll_table *wait){ struct scull_pipe *dev = filp->private_data; unsigned int mask = 0; /* * The buffer is circular; it is considered full ... 阅读全文
