Merge misc fixes from Andrew Morton.
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (21 commits)
mm: revert mremap pud_free anti-fix
mm: fix BUG in __split_huge_page_pmd
swap: fix set_blocksize race during swapon/swapoff
procfs: call default get_unmapped_area on MMU-present architectures
procfs: fix unintended truncation of returned mapped address
writeback: fix negative bdi max pause
percpu_refcount: export symbols
fs: buffer: move allocation failure loop into the allocator
mm: memcg: handle non-error OOM situations more gracefully
tools/testing/selftests: fix uninitialized variable
block/partitions/efi.c: treat size mismatch as a warning, not an error
mm: hugetlb: initialize PG_reserved for tail pages of gigantic compound pages
mm/zswap: bugfix: memory leak when re-swapon
mm: /proc/pid/pagemap: inspect _PAGE_SOFT_DIRTY only on present pages
mm: migration: do not lose soft dirty bit if page is in migration state
gcov: MAINTAINERS: Add an entry for gcov
mm/hugetlb.c: correct missing private flag clearing
mm/vmscan.c: don't forget to free shrinker->nr_deferred
ipc/sem.c: synchronize semop and semctl with IPC_RMID
ipc: update locking scheme comments
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