For years, placeholders for a 4th edition appeared on platforms like Amazon with various publication dates. Despite these listings, co-author Greg Kroah-Hartman confirmed that while a rough, incomplete draft existed, there were no active plans to finish it due to lack of a publisher contract and the sheer pace of kernel development.
Instead, I will write a comprehensive, helpful article that serves the of your search: helping developers find the official learning resources for Linux device drivers (including the legal 3rd edition, the outdated 4th edition's dead links, and modern alternatives). This will help you and other readers avoid malware-ridden fake PDFs while actually learning LDD. Linux Device Drivers 4th Edition O--39-reilly Pdf 11
Unlike the old days of hard-coding hardware addresses, modern Linux uses Device Trees to describe hardware structure, especially on ARM and RISC-V architectures. For years, placeholders for a 4th edition appeared