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

[Miaohe Lin]

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!

---
v1:
  rebase [1] on mainline.

[1] https://lore.kernel.org/lkml/20220304093409.25829-2-linmiaohe@xxxxxxxxxx/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/migrate.h |  2 +-
 include/linux/swapops.h |  4 ++--
 mm/filemap.c            | 10 +++++-----
 mm/hugetlb.c            |  2 +-
 mm/migrate.c            | 31 +++++++++++++------------------
 5 files changed, 22 insertions(+), 27 deletions(-)

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2.23.0