求助，最近遇到的问题，数据结构中函数另外命名，如“.llseek = no_llseek,”

[hoqi]

struct file_operations scull_pipe_fops = {
.owner = THIS_MODULE,//？？？，用到什么知识
.llseek = no_llseek,//？？？，用到什么知识
.read = scull_p_read,//？？？，用到什么知识
.write = scull_p_write,
.poll = scull_p_poll,
.ioctl = scull_ioctl,
.open = scull_p_open,
.release = scull_p_release,
.fasync = scull_p_fasync,
};
问题如上面标注，请高手指教，提示我这里是什么，用到什么知识，我好自己有迹可循。
这是我阅览linux device driver的程序scull中的pipe.c程序遇到的。
谢谢

[hoqi]

问题已经解决，
struct file_operations scull_pipe_fops = {
.llseek = no_llseek,
.read = scull_p_read,
.write = scull_p_write,
.poll = scull_p_poll,
.ioctl = scull_ioctl,
.open = scull_p_open,
.release = scull_p_release,
.fasync = scull_p_fasync,
};
是结构体变量的定义并且初始化，变量中的逗号是对结构体成员赋值，至于.owner、.llseek之类的则是是对内核函数的重构。
scull_pie_fops->read,则调用函数scull_p_reead().