• Linus Torvalds's avatar
    Merge tag 'libnvdimm-for-4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm · 53ef7d0e
    Linus Torvalds authored
    Pull libnvdimm updates from Dan Williams:
     "The bulk of this has been in multiple -next releases. There were a few
      late breaking fixes and small features that got added in the last
      couple days, but the whole set has received a build success
      notification from the kbuild robot.
      Change summary:
       - Region media error reporting: A libnvdimm region device is the
         parent to one or more namespaces. To date, media errors have been
         reported via the "badblocks" attribute attached to pmem block
         devices for namespaces in "raw" or "memory" mode. Given that
         namespaces can be in "device-dax" or "btt-sector" mode this new
         interface reports media errors generically, i.e. independent of
         namespace modes or state.
         This subsequently allows userspace tooling to craft "ACPI 6.1
         Section Function Index 4 - Clear Uncorrectable Error"
         requests and submit them via the ioctl path for NVDIMM root bus
       - Introduce 'struct dax_device' and 'struct dax_operations': Prompted
         by a request from Linus and feedback from Christoph this allows for
         dax capable drivers to publish their own custom dax operations.
         This fixes the broken assumption that all dax operations are
         related to a persistent memory device, and makes it easier for
         other architectures and platforms to add customized persistent
         memory support.
       - 'libnvdimm' core updates: A new "deep_flush" sysfs attribute is
         available for storage appliance applications to manually trigger
         memory controllers to drain write-pending buffers that would
         otherwise be flushed automatically by the platform ADR
         (asynchronous-DRAM-refresh) mechanism at a power loss event.
         Support for "locked" DIMMs is included to prevent namespaces from
         surfacing when the namespace label data area is locked. Finally,
         fixes for various reported deadlocks and crashes, also tagged for
       - ACPI / nfit driver updates: General updates of the nfit driver to
         add DSM command overrides, ACPI 6.1 health state flags support, DSM
         payload debug available by default, and various fixes.
      Acknowledgements that came after the branch was pushed:
       - commmit 565851c9 "device-dax: fix sysfs attribute deadlock":
    Tested-by: default avatarYi Zhang <yizhan@redhat.com>
       - commit 23f49844 "libnvdimm: rework region badblocks clearing"
         Tested-by: Toshi Kani <toshi.kani@hpe.com>"
    * tag 'libnvdimm-for-4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: (52 commits)
      libnvdimm, pfn: fix 'npfns' vs section alignment
      libnvdimm: handle locked label storage areas
      libnvdimm: convert NDD_ flags to use bitops, introduce NDD_LOCKED
      brd: fix uninitialized use of brd->dax_dev
      block, dax: use correct format string in bdev_dax_supported
      device-dax: fix sysfs attribute deadlock
      libnvdimm: restore "libnvdimm: band aid btt vs clear poison locking"
      libnvdimm: fix nvdimm_bus_lock() vs device_lock() ordering
      libnvdimm: rework region badblocks clearing
      acpi, nfit: kill ACPI_NFIT_DEBUG
      libnvdimm: fix clear length of nvdimm_forget_poison()
      libnvdimm, pmem: fix a NULL pointer BUG in nd_pmem_notify
      libnvdimm, region: sysfs trigger for nvdimm_flush()
      libnvdimm: fix phys_addr for nvdimm_clear_poison
      x86, dax, pmem: remove indirection around memcpy_from_pmem()
      block: remove block_device_operations ->direct_access()
      block, dax: convert bdev_dax_supported() to dax_direct_access()
      filesystem-dax: convert to dax_direct_access()
      Revert "block: use DAX for partition table reads"
      ext2, ext4, xfs: retrieve dax_device for iomap operations
device-mapper.h 17.7 KB