Summary

This chapter showed you the basics of driver development and explained the concept of modules/built-in devices, as well as their loading and unloading. Even if you are not able to interact with the user space, you are ready to write a complete driver, print a formatted message, and understand the concept of init/exit. The next chapter will deal with character devices, with which you will be able to target enhanced features, write code accessible from the user space, and have a significant impact on the system.