MAX_STACK_DEPTH unwind.h conflict with 2.6.30-rc2 kernel

[Josh Stone]

William Cohen wrote:
> I am working on getting systemtap tracepoints working with the 2.6.30-rc2-tip
> kernel (kernel installed using instructions on
> http://people.redhat.com/mingo/tip.git/readme.txt). I found when trying to run
> tracepoint examples have around that end up getting an error. It looks like the
> unwind MAX_STACK_DEPTH in the runtime conflicts with one in the kernel:

I committed a change earlier that renames our own macro.  I didn't look
too closely at the unwind code, but I think that should be enough.

Josh