[LITMUS^RT] ARM compilation patches.

[Manohar Vanga]

> Regarding the enabling of performance counters, it looks like a patch was submitted for enabling and using them on ARMv7 processors (both A8 and A9). I didn't check exactly when this was introduced: (http://lxr.free-electrons.com/source/arch/arm/kernel/perf_event_v7.c) I think you could just try back porting that file into the tree.

This looks like it's been in the tree for quite a while. It's there in the LitmusRT tree! It can be enabled with CONFIG_CPU_V7 :-)

Thanks and best regards!
/manohar