Are these books outdated?

[John Chludzinski]

The 2.6 kernel made significant changes to threading support in the 
kernel. In 2.6 there's now a 1-to-1 mapping from kthreads to pthreads.


On 2016-08-10 14:17, Greg KH wrote:
> On Wed, Aug 10, 2016 at 11:16:13PM +0530, Raul Piper wrote:
>> Most of the books like Essential linux device drivers, Robert love 
>> kernel
>> development,
>> Linux device drivers by Rubini
>> Most of the books are based on old kernels 2.2,2.6 etc
>> 
>> I wanted to know hasnt the kernel evolved during these times and is it 
>> still
>> good to design drivers based on that theory.Since device trees and 
>> possibly
>> many other concepts would have evolved and  obviously the apis related 
>> to them
>> like _of_ apis for device tree parsing.
>> Please comment- which book to be read or followed?
> 
> The ideas should still be the same, but the details have changed.
> 
> If you don't like that, then just refer to the best documentation there
> is, the source itself.  The kernel comes with TONS of built-in
> documentation (make pdfdocs) and all of the source code which shows
> exactly how things work together.
> 
> And it's free!
> 
> best of luck,
> 
> greg k-h