Merge branch 'akpm' (patches from Andrew)

Merge some more updates from Andrew Morton:

 - various hotfixes and minor things

 - hch's use_mm/unuse_mm clearnups

Subsystems affected by this patch series: mm/hugetlb, scripts, kcov,
lib, nilfs, checkpatch, lib, mm/debug, ocfs2, lib, misc.

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  kernel: set USER_DS in kthread_use_mm
  kernel: better document the use_mm/unuse_mm API contract
  kernel: move use_mm/unuse_mm to kthread.c
  kernel: move use_mm/unuse_mm to kthread.c
  stacktrace: cleanup inconsistent variable type
  lib: test get_count_order/long in test_bitops.c
  mm: add comments on pglist_data zones
  ocfs2: fix spelling mistake and grammar
  mm/debug_vm_pgtable: fix kernel crash by checking for THP support
  lib: fix bitmap_parse() on 64-bit big endian archs
  checkpatch: correct check for kernel parameters doc
  nilfs2: fix null pointer dereference at nilfs_segctor_do_construct()
  lib/lz4/lz4_decompress.c: document deliberate use of `&'
  kcov: check kcov_softirq in kcov_remote_stop()
  scripts/spelling: add a few more typos
  khugepaged: selftests: fix timeout condition in wait_for_scan()

diff --cc drivers/vhost/vhost.c
Simple merge

diff --cc include/linux/kthread.h
Simple merge

diff --cc kernel/kthread.c
index b84fc7e,86357cd..8e3d2d7
--- 1/kernel/kthread.c
--- 2/kernel/kthread.c
+++ b/kernel/kthread.c
@@@ -46,8 -51,8 +51,9 @@@ struct kthread_create_inf
  struct kthread {
        unsigned long flags;
        unsigned int cpu;
 +      int (*threadfn)(void *);
        void *data;
+       mm_segment_t oldfs;
        struct completion parked;
        struct completion exited;
  #ifdef CONFIG_BLK_CGROUP