Compiling xenoprof

[David Carr <dc@dcarr.org>]

I'm having some trouble compiling Xen 3.0.0 with the xenoprof patches.

The xenoprof instructions say:

  In order to run OProfile in Xen environments four patches are needed:
  a) xenoprof-2.0-xen-3.0.0.patch
     Patch for Xen hypervisor.
  b) xenoprof-2.0-linux-2.6-sparse.patch
     Patch for Xenolinux. Contains oprofile architecture specific driver 
     for xen (Apply to linux-sparse tree in Xen source tree)
  c) xenoprof-2.0-linux-2.6.12.patch
     Patch for oprofile kernel module in linux 2.6.12. Contain modifications
     to generic oprofile driver code to support xen. (Apply twice, once to 
     dom0 and once to domU trees)
 

Every thing goes fine until part c.  The linux-2.6.12-xen0 and
linux-2.6.12-xenU directories are empty until you build xen (and
therefore can't be patched yet.)  Doing a make world will populate these
trees but also compiles everything.

What is the proper sequence of patching and make commands to build a
xenoprof tree?

Thanks,
David Carr