一个网友写的关于块设备驱动的，写得很详细，很基础，文章标题是《写一个块设备驱动》，不过那是论坛的更新帖，不方便看，我自己花时间整理出来了-A netizen wrote block device driver, very detailed, the title of the article is to " write a block device driver, but updated the forum posts, inconvenient see, I have to spend time