Boots and seems to work with PREEMPT enabled

[Anton Ivanov]

Added support for kernel side fpu store/restore and real kernel_fpu_begin/kernel_fpu_end using gcc intrinsics. Enabled PREEMPT.

It boots and seems to be alive and kicking. I do not notice any significant effect on performance either.

How do I test it from here onwards?

I am happy to throw the patches on the list as an RFC, though I would prefer to test first :)

-- 
Anton R. Ivanov
https://www.kot-begemot.co.uk/