To write your first chapter, you don't need to rewrite the whole kernel (which now has over 40 million lines of code!) [28]. You start with a Kernel Module
Linux Kernel Development by Robert Love
Full source code spanning topics from memory allocation to concurrency 🛠️ University & Practice Lab Guides linux kernel programming pdf github
While it is a copyrighted book, various community repositories like swadhinsekhar/books jyfc/ebook host the 3rd Edition PDF for educational reference. Key Topics: To write your first chapter, you don't need