Merge branch 'akpm' (patches from Andrew)

Merge misc fixes from Andrew Morton:
 "14 patches.

  Subsystems affected by this patch series: mm (kasan, mremap, tmpfs,
  selftests, memcg, and slub), MAINTAINERS, squashfs, nilfs2, and
  firmware"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  nilfs2: make splice write available again
  mm, slub: better heuristic for number of cpus when calculating slab order
  Revert "mm: memcontrol: avoid workload stalls when lowering memory.high"
  MAINTAINERS: update Andrey Ryabinin's email address
  selftests/vm: rename file run_vmtests to run_vmtests.sh
  tmpfs: disallow CONFIG_TMPFS_INODE64 on alpha
  tmpfs: disallow CONFIG_TMPFS_INODE64 on s390
  mm/mremap: fix BUILD_BUG_ON() error in get_extent
  firmware_loader: align .builtin_fw to 8
  kasan: fix stack traces dependency for HW_TAGS
  squashfs: add more sanity checks in xattr id lookup
  squashfs: add more sanity checks in inode lookup
  squashfs: add more sanity checks in id lookup
  squashfs: avoid out of bounds writes in decompressors