Merge branch 'stable/for-linus-3.5.rebased' into uek2-merge

Merge branch 'stable/for-linus-3.5.rebased' into uek2-merge

* stable/for-linus-3.5.rebased: (22 commits)
  x86/apic: Fix UP boot crash
  xen/apic: implement io apic read with hypercall
  xen/x86: Implement x86_apic_ops
  x86/apic: Replace io_apic_ops with x86_io_apic_ops.
  x86/ioapic: Add io_apic_ops driver layer to allow interception
  xen: implement IRQ_WORK_VECTOR handler
  xen: implement apic ipi interface
  xen/gnttab: add deferred freeing logic
  xen: enter/exit lazy_mmu_mode around m2p_override calls
  xen/setup: update VA mapping when releasing memory during setup
  xen/setup: Combine the two hypercall functions - since they are quite similar.
  xen/setup: Populate freed MFNs from non-RAM E820 entries and gaps to E820 RAM
  xen/setup: Only print "Freeing XXX-YYY pfn range: Z pages freed" if Z > 0
  xen/p2m: An early bootup variant of set_phys_to_machine
  xen/p2m: Collapse early_alloc_p2m_middle redundant checks.
  xen/p2m: Allow alloc_p2m_middle to call reserve_brk depending on argument
  xen/p2m: Move code around to allow for better re-usage.
  xen: only limit memory map to maximum reservation for domain 0.
  xen: release all pages within 1-1 p2m mappings
  xen: allow extra memory to be in multiple regions
  ...

Conflicts:
	arch/x86/xen/Makefile
	arch/x86/xen/enlighten.c
	arch/x86/xen/setup.c
	arch/x86/xen/xen-ops.h
	include/xen/page.h