[Fedora-xen] Xen w/ Matrox Parhelia - cpu_callout_map

[Vann Walke]

I've been attempting to use my machine with a Matrox Parhelia card with
the Fedora Core 6 Xen kernel.  The Matrox card requires a kernel
module.  The module builds without error, but fails to load due to an
unknown symbol, "cpu_callout_map".

I submitted this issue to the Unofficial Matrox Technical Support Forum,
but haven't been able to resolve anything yet:
http://matrox.tuxx-home.at/viewtopic.php?t=185

I've also submitted this question to the xen-users mailing list who
asked that I try here (the fedora-xen list) first.

Any thoughts on how to resolve this problem?  How would I find out what
the function of cpu_callout_map is and why it is being compiled into the
mtx module?  Any idea if this is a general Xen issue or is it FC6 specific?

Many thanks for your help,
Vann