[CentOS] Get error msg if try to use kernel makefile / build kernel

Using the new method for building a standalone kernel module
(although seems to happen with the traditional way as well)
I get "mach_mpspec.h: No such file or directory"

Same result if I try to do a kernel 'make'.

Subsequently I get MAX_MP_BUSSES and MAX_IRQ_SOURCES undeclared.

This should surely work 'out of the box' with Centos ?

Any ideas about what's missing ?

Thanks,
MikeW