Merge branch 'akpm' (patches from Andrew)

Merge branch 'akpm' (patches from Andrew)

Merge misc fixes from Andrew Morton:
 "19 patches.

  Subsystems affected by this patch series: mm (userfaultfd, migration,
  memblock, mempolicy, slub, secretmem, and thp), ocfs2, binfmt, vfs,
  and misc"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  mailmap: add Andrej Shadura
  mm/thp: decrease nr_thps in file's mapping on THP split
  mm/secretmem: fix NULL page->mapping dereference in page_is_secretmem()
  vfs: check fd has read access in kernel_read_file_from_fd()
  elfcore: correct reference to CONFIG_UML
  mm, slub: fix incorrect memcg slab count for bulk free
  mm, slub: fix potential use-after-free in slab_debugfs_fops
  mm, slub: fix potential memoryleak in kmem_cache_open()
  mm, slub: fix mismatch between reconstructed freelist depth and cnt
  mm, slub: fix two bugs in slab_debug_trace_open()
  mm/mempolicy: do not allow illegal MPOL_F_NUMA_BALANCING | MPOL_LOCAL in mbind()
  memblock: check memory total_size
  ocfs2: mount fails with buffer overflow in strlen
  ocfs2: fix data corruption after conversion from inline format
  mm/migrate: fix CPUHP state to update node demotion order
  mm/migrate: add CPU hotplug to demotion #ifdef
  mm/migrate: optimize hotplug-time demotion order updates
  userfaultfd: fix a race between writeprotect and exit_mmap()
  mm/userfaultfd: selftests: fix memory corruption with thp enabled