• Linus Torvalds's avatar
    Merge tag 'libnvdimm-for-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm · d080827f
    Linus Torvalds authored
    Pull libnvdimm updates from Dan Williams:
     "The bulk of this has appeared in -next and independently received a
      build success notification from the kbuild robot.  The 'for-4.5/block-
      dax' topic branch was rebased over the weekend to drop the "block
      device end-of-life" rework that Al would like to see re-implemented
      with a notifier, and to address bug reports against the badblocks
      integration.
    
      There is pending feedback against "libnvdimm: Add a poison list and
      export badblocks" received last week.  Linda identified some localized
      fixups that we will handle incrementally.
    
      Summary:
    
       - Media error handling: The 'badblocks' implementation that
         originated in md-raid is up-levelled to a generic capability of a
         block device.  This initial implementation is limited to being
         consulted in the pmem block-i/o path.  Later, 'badblocks' will be
         consulted when creating dax mappings.
    
       - Raw block device dax: For virtualization and other cases that want
         large contiguous mappings of persistent memory, add the capability
         to dax-mmap a block device directly.
    
       - Increased /dev/mem restrictions: Add an option to treat all
         io-memory as IORESOURCE_EXCLUSIVE, i.e. disable /dev/mem access
         while a driver is actively using an address range.  This behavior
         is controlled via the new CONFIG_IO_STRICT_DEVMEM option and can be
         overridden by the existing "iomem=relaxed" kernel command line
         option.
    
       - Miscellaneous fixes include a 'pfn'-device huge page alignment fix,
         block device shutdown crash fix, and other small libnvdimm fixes"
    
    * tag 'libnvdimm-for-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: (32 commits)
      block: kill disk_{check|set|clear|alloc}_badblocks
      libnvdimm, pmem: nvdimm_read_bytes() badblocks support
      pmem, dax: disable dax in the presence of bad blocks
      pmem: fail io-requests to known bad blocks
      libnvdimm: convert to statically allocated badblocks
      libnvdimm: don't fail init for full badblocks list
      block, badblocks: introduce devm_init_badblocks
      block: clarify badblocks lifetime
      badblocks: rename badblocks_free to badblocks_exit
      libnvdimm, pmem: move definition of nvdimm_namespace_add_poison to nd.h
      libnvdimm: Add a poison list and export badblocks
      nfit_test: Enable DSMs for all test NFITs
      md: convert to use the generic badblocks code
      block: Add badblock management for gendisks
      badblocks: Add core badblock management code
      block: fix del_gendisk() vs blkdev_ioctl crash
      block: enable dax for raw block devices
      block: introduce bdev_file_inode()
      restrict /dev/mem to idle io memory ranges
      arch: consolidate CONFIG_STRICT_DEVM in lib/Kconfig.debug
      ...
    d080827f
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