If you are a kernel developer searching for this resource, here is the full context of why it's missing, where you can find modern alternatives, and how GitHub still plays a role in keeping the classic 3rd Edition relevant. The Mystery of the 4th Edition
Community-led GitHub repositories effectively serve as the "living 4th edition" by updating the book’s examples to work with current kernels: Linux Device Drivers 4th Edition Pdf Github
Since there is no official 4th Edition PDF, developers have turned to GitHub to maintain the code. The 3rd Edition was written for the 2.6 kernel (released in 2005). Because the Linux kernel API changes constantly, the original code no longer compiles on modern versions (5.x or 6.x). If you are a kernel developer searching for