Merge branch 'akpm' (patches from Andrew)

Merge misc fixes from Andrew Morton:
 "12 patches.

  Subsystems affected by this patch series: mm (memcg, zsmalloc, swap,
  mailmap, selftests, pagecache, hugetlb, pagemap), lib, and coredump"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  mm/mmap.c: fix mmap return value when vma is merged after call_mmap()
  hugetlb_cgroup: fix offline of hugetlb cgroup with reservations
  mm/filemap: add static for function __add_to_page_cache_locked
  userfaultfd: selftests: fix SIGSEGV if huge mmap fails
  tools/testing/selftests/vm: fix build error
  mailmap: add two more addresses of Uwe Kleine-König
  mm/swapfile: do not sleep with a spin lock held
  mm/zsmalloc.c: drop ZSMALLOC_PGTABLE_MAPPING
  mm: list_lru: set shrinker map bit when child nr_items is not zero
  mm: memcg/slab: fix obj_cgroup_charge() return value handling
  coredump: fix core_pattern parse error
  zlib: export S390 symbols for zlib modules