[Patch v4 0/7] mm/hugetlb: code refine and simplification

[Wei Yang <richard.weiyang@linux.alibaba.com>]

Following are some cleanup for hugetlb.

Simple test with tools/testing/selftests/vm/map_hugetlb pass.

v4:
  * fix a logic error for patch 7, thanks Mike
v3:
  * rebase on v5.9-rc2 which adjust the last patch a little
v2:
  * drop 5/6/10 since similar patches are merged or under review.
  * adjust 2 based on comment from Mike Kravetz

Wei Yang (7):
  mm/hugetlb: not necessary to coalesce regions recursively
  mm/hugetlb: remove VM_BUG_ON(!nrg) in
    get_file_region_entry_from_cache()
  mm/hugetlb: use list_splice to merge two list at once
  mm/hugetlb: count file_region to be added when regions_needed != NULL
  mm/hugetlb: a page from buddy is not on any list
  mm/hugetlb: narrow the hugetlb_lock protection area during preparing
    huge page
  mm/hugetlb: take the free hpage during the iteration directly

 mm/hugetlb.c | 73 ++++++++++++++++++++++------------------------------
 1 file changed, 31 insertions(+), 42 deletions(-)

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2.20.1 (Apple Git-117)