Adapted a patch set created by Badari Pulavarty of IBM, that
addresses a fatal initialization-time crash error that indicated
"crash: invalid structure member offset: x8664_pda_level4_pgt"
when run against post-2.6.10 x86_64 kernels. But more importantly,
Badari's patch adds support for these x86_64 kernel changes that
were introduced in 2.6.11:
- x86_64 kernel virtual address range changes, and
- x86_64 user virtual address space usage of 4-level page tables
