• Linus Torvalds's avatar
    Merge tag 'dax-fixes-5.3-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm · b6c0649c
    Linus Torvalds authored
    Pull dax fixes from Dan Williams:
     "A filesystem-dax and device-dax fix for v5.3.
    
      The filesystem-dax fix is tagged for stable as the implementation has
      been mistakenly throwing away all cow pages on any truncate or hole
      punch operation as part of the solution to coordinate device-dma vs
      truncate to dax pages.
    
      The device-dax change fixes up a regression this cycle from the
      introduction of a common 'internal per-cpu-ref' implementation.
    
      Summary:
    
       - Fix dax_layout_busy_page() to not discard private cow pages of
         fs/dax private mappings.
    
       - Update the memremap_pages core to properly cleanup on behalf of
         internal reference-count users like device-dax"
    
    * tag 'dax-fixes-5.3-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
      mm/memremap: Fix reuse of pgmap instances with internal references
      dax: dax_layout_busy_page() should not unmap cow pages
    b6c0649c
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