[LITMUS^RT] rebasing on top of Linux 4.1

[Björn Brandenburg]

Hi everyone,

just to let you know, I’ve started the rebasing effort to move LITMUS^RT to Linux 4.1. There has been quite a lot of churn in Linux since 3.10, including some major API changes that affect us, so progress is a bit slow and the rebase is not yet complete. Nonetheless, if you’re curious or want to help out, I’ve pushed my work-in-progress branches to Github. 

The branch squashed is equivalent to master, with the few feature commits since the last rebase merged into the patchset:

	https://github.com/LITMUS-RT/litmus-rt/commits/squashed

The branch next is the (still incomplete) rebased version of LITMUS^RT.

	https://github.com/LITMUS-RT/litmus-rt/commits/next

As you can see, there are still ~30 patches missing. I hope to get through the rest in the next week; unfortunately, almost every single match requires manual corrections. Patches & problem reports welcome.

Thanks,
Björn