Merge branch 'akpm' (patches from Andrew)
Merge fixes from Andrew Morton:
"21 fixes"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (21 commits)
writeback: fix initial dirty limit
mm/memory-failure: set PageHWPoison before migrate_pages()
mm: check __PG_HWPOISON separately from PAGE_FLAGS_CHECK_AT_*
mm/memory-failure: give up error handling for non-tail-refcounted thp
mm/memory-failure: fix race in counting num_poisoned_pages
mm/memory-failure: unlock_page before put_page
ipc: use private shmem or hugetlbfs inodes for shm segments.
mm: initialize hotplugged pages as reserved
ocfs2: fix shift left overflow
kthread: export kthread functions
fsnotify: fix oops in fsnotify_clear_marks_by_group_flags()
lib/iommu-common.c: do not use 0xffffffffffffffffl for computing align_mask
mm/slub: allow merging when SLAB_DEBUG_FREE is set
signalfd: fix information leak in signalfd_copyinfo
signal: fix information leak in copy_siginfo_to_user
signal: fix information leak in copy_siginfo_from_user32
ocfs2: fix BUG in ocfs2_downconvert_thread_do_work()
fs, file table: reinit files_stat.max_files after deferred memory initialisation
mm, meminit: replace rwsem with completion
mm, meminit: allow early_pfn_to_nid to be used during runtime
...
