• Linus Torvalds's avatar
    Merge tag 'libnvdimm-for-4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm · a3841f94
    Linus Torvalds authored
    Pull libnvdimm and dax updates from Dan Williams:
     "Save for a few late fixes, all of these commits have shipped in -next
      releases since before the merge window opened, and 0day has given a
      build success notification.
      The ext4 touches came from Jan, and the xfs touches have Darrick's
      reviewed-by. An xfstest for the MAP_SYNC feature has been through
      a few round of reviews and is on track to be merged.
       - Introduce MAP_SYNC and MAP_SHARED_VALIDATE, a mechanism to enable
         'userspace flush' of persistent memory updates via filesystem-dax
         mappings. It arranges for any filesystem metadata updates that may
         be required to satisfy a write fault to also be flushed ("on disk")
         before the kernel returns to userspace from the fault handler.
         Effectively every write-fault that dirties metadata completes an
         fsync() before returning from the fault handler. The new
         MAP_SHARED_VALIDATE mapping type guarantees that the MAP_SYNC flag
         is validated as supported by the filesystem's ->mmap() file
       - Add support for the standard ACPI 6.2 label access methods that
         replace the NVDIMM_FAMILY_INTEL (vendor specific) label methods.
         This enables interoperability with environments that only implement
         the standardized methods.
       - Add support for the ACPI 6.2 NVDIMM media error injection methods.
       - Add support for the NVDIMM_FAMILY_INTEL v1.6 DIMM commands for
         latch last shutdown status, firmware update, SMART error injection,
         and SMART alarm threshold control.
       - Cleanup physical address information disclosures to be root-only.
       - Fix revalidation of the DIMM "locked label area" status to support
         dynamic unlock of the label area.
       - Expand unit test infrastructure to mock the ACPI 6.2 Translate SPA
         (system-physical-address) command and error injection commands.
      Acknowledgements that came after the commits were pushed to -next:
       - 957ac8c4 ("dax: fix PMD faults on zero-length files"):
    Reviewed-by: default avatarRoss Zwisler <ross.zwisler@linux.intel.com>
       - a39e596b ("xfs: support for synchronous DAX faults") and
         7b565c9f ("xfs: Implement xfs_filemap_pfn_mkwrite() using __xfs_filemap_fault()")
            Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>"
    * tag 'libnvdimm-for-4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: (49 commits)
      acpi, nfit: add 'Enable Latch System Shutdown Status' command support
      dax: fix general protection fault in dax_alloc_inode
      dax: fix PMD faults on zero-length files
      dax: stop requiring a live device for dax_flush()
      brd: remove dax support
      dax: quiet bdev_dax_supported()
      fs, dax: unify IOMAP_F_DIRTY read vs write handling policy in the dax core
      tools/testing/nvdimm: unit test clear-error commands
      acpi, nfit: validate commands against the device type
      tools/testing/nvdimm: stricter bounds checking for error injection commands
      xfs: support for synchronous DAX faults
      xfs: Implement xfs_filemap_pfn_mkwrite() using __xfs_filemap_fault()
      ext4: Support for synchronous DAX faults
      ext4: Simplify error handling in ext4_dax_huge_fault()
      dax: Implement dax_finish_sync_fault()
      dax, iomap: Add support for synchronous faults
      mm: Define MAP_SYNC and VM_SYNC flags
      dax: Allow tuning whether dax_insert_mapping_entry() dirties entry
      dax: Allow dax_iomap_fault() to return pfn
      dax: Fix comment describing dax_iomap_fault()
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