[PATCH] correction for PPC __compare_and_swap

[dmehaffy@us.ibm.com]

Geoff,

I'll have Brian tryout your patch with our Java people and see if it solves
their problem.  Meanwhile I will look at seeing if I can come up with a
patch that doesn't use __compare_and_swap for the lock release.  I agree
that we would like to not change machine independent code but I think we
will have to change a line or two and we can #ifdef powerpc the code though
I hope I can find away around that.

Dave

Dr. David W. Mehaffy                                   Senior Technical
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AIX System Architecture & Linux Affinity
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