[PATCH v4 0/6] Fixes related namespace alignment/page size/big endian

[Aneesh Kumar K.V]

This series handle configs where hugepage support is not enabled by default.
Also, we update some of the information messages to make sure we use PAGE_SIZE instead
of SZ_4K. We now store page size and struct page size in pfn_sb and do extra check
before enabling namespace. There also an endianness fix.

The patch series is on top of subsection v10 patchset

http://lore.kernel.org/linux-mm/156092349300.979959.17603710711957735135.stgit@dwillia2-desk3.amr.corp.intel.com

Changes from V3:
* Dropped the change related PFN_MIN_VERSION
* for pfn_sb minor version < 4, we default page_size to PAGE_SIZE instead of SZ_4k.

Aneesh Kumar K.V (6):
  nvdimm: Consider probe return -EOPNOTSUPP as success
  mm/nvdimm: Add page size and struct page size to pfn superblock
  mm/nvdimm: Use correct #defines instead of open coding
  mm/nvdimm: Pick the right alignment default when creating dax devices
  mm/nvdimm: Use correct alignment when looking at first pfn from a
    region
  mm/nvdimm: Fix endian conversion issues 

 arch/powerpc/include/asm/libnvdimm.h |  9 ++++
 arch/powerpc/mm/Makefile             |  1 +
 arch/powerpc/mm/nvdimm.c             | 34 +++++++++++++++
 arch/x86/include/asm/libnvdimm.h     | 19 +++++++++
 drivers/nvdimm/btt.c                 |  8 ++--
 drivers/nvdimm/bus.c                 |  4 +-
 drivers/nvdimm/label.c               |  2 +-
 drivers/nvdimm/namespace_devs.c      | 13 +++---
 drivers/nvdimm/nd-core.h             |  3 +-
 drivers/nvdimm/nd.h                  |  6 ---
 drivers/nvdimm/pfn.h                 |  5 ++-
 drivers/nvdimm/pfn_devs.c            | 62 ++++++++++++++++++++++++++--
 drivers/nvdimm/pmem.c                | 26 ++++++++++--
 drivers/nvdimm/region_devs.c         | 27 ++++++++----
 include/linux/huge_mm.h              |  7 +++-
 kernel/memremap.c                    |  8 ++--
 16 files changed, 194 insertions(+), 40 deletions(-)
 create mode 100644 arch/powerpc/include/asm/libnvdimm.h
 create mode 100644 arch/powerpc/mm/nvdimm.c
 create mode 100644 arch/x86/include/asm/libnvdimm.h

-- 
2.21.0