Merge branch 'akpm' (patches from Andrew)

Merge branch 'akpm' (patches from Andrew)

Merge misc fixes from Andrew Morton:
 "9 fixes"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  mailmap: update Mark Yao's email address
  userfaultfd: clear the vma->vm_userfaultfd_ctx if UFFD_EVENT_FORK fails
  mm/sparse.c: wrong allocation for mem_section
  mm/zsmalloc.c: include fs.h
  mm/debug.c: provide useful debugging information for VM_BUG
  kernel/exit.c: export abort() to modules
  mm/mprotect: add a cond_resched() inside change_pmd_range()
  kernel/acct.c: fix the acct->needcheck check in check_free_space()
  mm: check pfn_valid first in zero_resv_unavail