linux device driver看了好几遍，总感觉不够透彻，很多东西经不住问，才深深的意识到，要走进linux的浩瀚世界，并不是一件容易的事情。我决定从理论到实践，再一次走一遍这本书。-linux device driver looked at it several times, always feel thoroughly enough, many things stand up to ask, just deeply aware of the vastness of the world to enter linux is not an easy task. I decided from theory to practice, once more again this book.