Voluntary Preempt additions

This is in addition to voluntary preempt U5 . So, first apply up to
Voluntary Preempt U4 , then apply this patch. I'll release for U5 as
soon as it's formally released. 

We are releasing the following new features,
                                                                                      
- Architecture independent mutex with priority inheritance. Note, we 
have only tested this in x86.
                                                                                      
- Modified latency tracer to trace non-preemptable mutex locking , in
/proc/lock_trace
                                                                                      
- Added two new locking functions _mutex_lock_cpu and _mutex_unlock_cpu.


Get the patch at,

ftp://source.mvista.com/pub/realtime/Linux-2.6.9_rc4-mm1-...


Daniel Walker

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