Pull libnvdimm updates from Dan Williams:
 "The bulk of this has been in -next since before the merge window
  opened, with no known collisions / issues reported.

  The only detail worth noting, outside the summary below, is that the
  "libnvdimm-start-pad" topic has been truncated to just cleanups and
  small fixes. The full topic branch would have doubled down on hacks
  around the "section alignment" limitation of the core-mm, instead
  effort is now being spent to address that root issue in the memory
  hotplug implementation for v5.2.

   - Fix nfit-bus command submission regression

   - Support retrieval of short-ARS results if the ARS state is
     "requires continuation", and even if the "no_init_ars" module
     parameter is specified

   - Allow busy-polling of the kernel ARS state by allowing root to
     reset the exponential back-off timer

   - Filter potentially stale ARS results by tracking query-ARS relative
     to the previous start-ARS

   - Enhance dax_device alignment checks

   - Add support for the Hyper-V family of device-specific-methods
     (DSMs)

   - Add several fixes and workarounds for Hyper-V compatibility

   - Fix support to cache the dirty-shutdown-count at init"

* tag 'libnvdimm-for-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: (25 commits)
  libnvdimm/namespace: Clean up holder_class_store()
  libnvdimm/of_pmem: Fix platform_no_drv_owner.cocci warnings
  acpi/nfit: Update NFIT flags error message
  libnvdimm/btt: Fix LBA masking during 'free list' population
  libnvdimm/btt: Remove unnecessary code in btt_freelist_init
  libnvdimm/pfn: Remove dax_label_reserve
  dax: Check the end of the block-device capacity with dax_direct_access()
  nfit/ars: Avoid stale ARS results
  nfit/ars: Allow root to busy-poll the ARS state machine
  nfit/ars: Introduce scrub_flags
  nfit/ars: Remove ars_start_flags
  nfit/ars: Attempt short-ARS even in the no_init_ars case
  nfit/ars: Attempt a short-ARS whenever the ARS state is idle at boot
  acpi/nfit: Require opt-in for read-only label configurations
  libnvdimm/pmem: Honor force_raw for legacy pmem regions
  libnvdimm/pfn: Account for PAGE_SIZE > info-block-size in nd_pfn_init()
  libnvdimm: Fix altmap reservation size calculation
  libnvdimm, pfn: Fix over-trim in trim_pfn_device()
  acpi/nfit: Fix bus command validation
  libnvdimm/dimm: Add a no-BLK quirk based on NVDIMM family
  ...