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:

quoted

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