Merge git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86

Merge git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86

* git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86:
  x86: pit_clockevent can be static
  x86: EFI runtime code mapping enhancement
  x86: EFI: fix use of unitialized variable and the cache logic
  x86: CPA: fix gbpages support in try_preserve_large_page
  xen: unpin initial Xen pagetable once we're finished with it
  x86/early_ioremap: don't assume we're using swapper_pg_dir
  x86: fixup machine_ops reboot_{32|64}.c unification fallout
  x86: fix sigcontext.h user export