Merge branch 'stable/bug.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen

* 'stable/bug.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
  xen/setup: Fix for incorrect xen_extra_mem_start.
  xen: When calling power_off, don't call the halt function.
  xen: Fix compile warning when CONFIG_SMP is not defined.
  xen: support CONFIG_MAXSMP
  xen: partially revert "xen: set max_pfn_mapped to the last pfn mapped"