problems compiling kernel-smp-2.6.9-39 for x86_64

[Mindy Preston <mpreston ssec wisc edu>]

I'm trying to recompile this kernel for XFS support.  I just downloaded 
the kernel source RPM with up2date today.  I've remade kernel.spec as is 
now good and proper, set up my .config, and made oldconfig.  When I try 
to make, here's what I get:

[root snaapy kernel-2.6.934.ELsmp]# make
 CHK     include/linux/version.h
 CHK     include/asm-x86_64/offset.h
/bin/sh: arch/x86_64/kernel/asm-offsets.s: No such file or directory
 UPD     include/asm-x86_64/offset.h
mv: cannot stat `include/asm-x86_64/offset.h.tmp': No such file or directory
make: *** [include/asm-x86_64/offset.h] Error 1

Any ideas on this?  I've done some web trawling and it looks like 
downloading a new kernel source or remaking kernel.spec fixes this for 
other people, but neither has worked for me.

-Mindy