You can see the "TODO" markers scattered throughout the PDF. Some chapters feel like rough drafts or outlines.
If you are looking for a "5th Edition" experience—meaning documentation for modern kernels (5.x or 6.x)—the following titles serve as the spiritual successors: Linux Device Drivers 5th Edition Pdf
Ideal for developers working with embedded hardware and . You can see the "TODO" markers scattered throughout the PDF
Note the __init and __exit macros and MODULE_* metadata—these are critical in modern kernels. there are typographical errors
Since it's unofficial, there are typographical errors, code formatting glitches, and occasional contradictory explanations. The PDF might also be a snapshot from a Git repo—meaning sections could be months out of sync with each other.