[PATCH v2 0/4] A few cleanup and fixup patches for migration

[Miaohe Lin <linmiaohe@huawei.com>]

Hi everyone,
This series contains a few patches to remove unneeded lock page and
PageMovable check, reduce the rcu lock duration. Also we fix potential
pte_unmap on an not mapped pte. More details can be found in the
respective changelogs. Thanks!

---
v2:
  collect Reviewed-by tag
  make isolate_huge_page consistent with isolate_lru_page
  add hugetlbfs variant of hugetlb_migration_entry_wait
v1:
  rebase [1] on mainline.

[1] https://lore.kernel.org/lkml/20220304093409.25829-2-linmiaohe@huawei.com/T/
---
Miaohe Lin (4):
  mm/migration: reduce the rcu lock duration
  mm/migration: remove unneeded lock page and PageMovable check
  mm/migration: return errno when isolate_huge_page failed
  mm/migration: fix potential pte_unmap on an not mapped pte

 include/linux/hugetlb.h |  6 +++---
 include/linux/swapops.h | 12 ++++++++----
 mm/gup.c                |  2 +-
 mm/hugetlb.c            | 15 +++++++--------
 mm/memory-failure.c     |  2 +-
 mm/mempolicy.c          |  2 +-
 mm/migrate.c            | 39 +++++++++++++++++++++++++--------------
 7 files changed, 46 insertions(+), 32 deletions(-)

-- 
2.23.0