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While placeholder listings sometimes appear on retail sites like Amazon, the authors (including Greg Kroah-Hartman) have stated there are currently no plans for a 4th edition from O'Reilly. Instead of searching for a non-existent file, you should focus on the legitimate, free versions of the 3rd edition and the modern alternatives that have replaced it.
If you are looking for free and legal resources to learn Linux device driver development, you should look toward the 3rd Edition or alternative modern titles. The Classic: Linux Device Drivers, 3rd Edition (LDD3)
To understand the demand for the 4th edition, one must appreciate the lineage of this book. Originally written by Alessandro Rubini and later updated by Jonathan Corbet, Greg Kroah-Hartman, and Rubini himself, Linux Device Drivers has been the primary textbook for anyone looking to write code that talks directly to hardware.
While placeholder listings sometimes appear on retail sites like Amazon, the authors (including Greg Kroah-Hartman) have stated there are currently no plans for a 4th edition from O'Reilly. Instead of searching for a non-existent file, you should focus on the legitimate, free versions of the 3rd edition and the modern alternatives that have replaced it.
If you are looking for free and legal resources to learn Linux device driver development, you should look toward the 3rd Edition or alternative modern titles. The Classic: Linux Device Drivers, 3rd Edition (LDD3)
To understand the demand for the 4th edition, one must appreciate the lineage of this book. Originally written by Alessandro Rubini and later updated by Jonathan Corbet, Greg Kroah-Hartman, and Rubini himself, Linux Device Drivers has been the primary textbook for anyone looking to write code that talks directly to hardware.