- upstream updates:
  + p2m: Check return value of p2m_set_entry() when decreasing reservation (thx George Dunlap) (XSA-247).
  + p2m: Always check to see if removing a p2m entry actually worked (thx George Dunlap). (XSA-247)
  + x86/pod: prevent infinite loop when shattering large pages (thx Julien Grall). (XSA-246)
  + x86/shadow: correct SH_LINEAR mapping detection in sh_guess_wrmap() (thx Andrew Cooper). (XSA-243)
  + x86: don't wrongly trigger linear page table assertion (thx Jan Beulich). (XSA-240)
  + x86/mm: fix race condition in modify_xen_mappings() (thx Yu Zhang).
  + x86/mm: fix race conditions in map_pages_to_xen() (thx Min He).
  + x86/hvm: do not register hpet mmio during s3 cycle (thx Eric Chanudet).
  + x86/mm: Make PV linear pagetables optional (thx George Dunlap).
  + x86: fix asm() constraint for GS selector update (thx Jan Beulich).
  + x86: don't latch wrong (stale) GS base addresses (thx Jan Beulich).
  + x86: also show FS/GS base addresses when dumping registers (thx Jan Beulich).
  + x86: fix GS-base-dirty determination (thx Jan Beulich).
  + ui/gtk: Fix deprecation of vte_terminal_copy_clipboard (thx Anthony PERARD).
  + xen/pt: allow QEMU to request MSI unmasking at bind time (thx Roger Pau Monne).

- fix ubt-macro usage in changelog

- fix ubt-macro usage in changelog

- fix ubt-macro usage in changelog