Merge branch 'stable/for-linus-3.7.rebased' into uek2-merge

Merge branch 'stable/for-linus-3.7.rebased' into uek2-merge

* stable/for-linus-3.7.rebased:
  xen/p2m: Reserve 8MB of _brk space for P2M leafs when populating back.
  xen/mmu: Remove from __ka space PMD entries for pagetables.
  xen/mmu: Copy and revector the P2M tree.
  xen/p2m: Add logic to revector a P2M tree to use __va leafs.
  xen/mmu: Recycle the Xen provided L4, L3, and L2 pages
  xen/mmu: For 64-bit do not call xen_map_identity_early
  xen/mmu: use copy_page instead of memcpy.
  xen/mmu: Provide comments describing the _ka and _va aliasing issue
  xen/mmu: The xen_setup_kernel_pagetable doesn't need to return anything.
  xen/x86: Use memblock_reserve for sensitive areas.
  xen/p2m: Fix the comment describing the P2M tree.
  xen/perf: Define .glob for the different hypercalls.