• Linus Torvalds's avatar
    Merge tag 'for-linus-hmm' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma · fec88ab0
    Linus Torvalds authored
    Pull HMM updates from Jason Gunthorpe:
     "Improvements and bug fixes for the hmm interface in the kernel:
       - Improve clarity, locking and APIs related to the 'hmm mirror'
         feature merged last cycle. In linux-next we now see AMDGPU and
         nouveau to be using this API.
       - Remove old or transitional hmm APIs. These are hold overs from the
         past with no users, or APIs that existed only to manage cross tree
         conflicts. There are still a few more of these cleanups that didn't
         make the merge window cut off.
       - Improve some core mm APIs:
           - export alloc_pages_vma() for driver use
           - refactor into devm_request_free_mem_region() to manage
             DEVICE_PRIVATE resource reservations
           - refactor duplicative driver code into the core dev_pagemap
       - Remove hmm wrappers of improved core mm APIs, instead have drivers
         use the simplified API directly
       - Remove DEVICE_PUBLIC
       - Simplify the kconfig flow for the hmm users and core code"
    * tag 'for-linus-hmm' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma: (42 commits)
      mm: don't select MIGRATE_VMA_HELPER from HMM_MIRROR
      mm: remove the HMM config option
      mm: sort out the DEVICE_PRIVATE Kconfig mess
      mm: simplify ZONE_DEVICE page private data
      mm: remove hmm_devmem_add
      mm: remove hmm_vma_alloc_locked_page
      nouveau: use devm_memremap_pages directly
      nouveau: use alloc_page_vma directly
      PCI/P2PDMA: use the dev_pagemap internal refcount
      device-dax: use the dev_pagemap internal refcount
      memremap: provide an optional internal refcount in struct dev_pagemap
      memremap: replace the altmap_valid field with a PGMAP_ALTMAP_VALID flag
      memremap: remove the data field in struct dev_pagemap
      memremap: add a migrate_to_ram method to struct dev_pagemap_ops
      memremap: lift the devmap_enable manipulation into devm_memremap_pages
      memremap: pass a struct dev_pagemap to ->kill and ->cleanup
      memremap: move dev_pagemap callbacks into a separate structure
      memremap: validate the pagemap type passed to devm_memremap_pages
      mm: factor out a devm_request_free_mem_region helper
      mm: export alloc_pages_vma
memory-failure.c 51.8 KB