[PATCH v5 0/7] Fix some cache flush bugs

[Muchun Song <songmuchun@bytedance.com>]

This series focus on fixing cache maintenance.

v5:
  - Collect Reviewed-by from Mike.
  - Fix mcopy_atomic_pte() and __mcopy_atomic() (Mike).
  - Fix shmem_mfill_atomic_pte().

v4:
  - Replace folio_copy() with copy_user_huge_page().
  - Update commit message for patch 2.

v3:
  - Collect Reviewed-by tag from Zi Yan.
  - Fix hugetlb cache maintenance.

v2:
  - Collect Reviewed-by tag from Zi Yan.
  - Using a for loop instead of the folio variant for backportability.

Muchun Song (7):
  mm: thp: fix wrong cache flush in remove_migration_pmd()
  mm: fix missing cache flush for all tail pages of compound page
  mm: hugetlb: fix missing cache flush in copy_huge_page_from_user()
  mm: hugetlb: fix missing cache flush in hugetlb_mcopy_atomic_pte()
  mm: shmem: fix missing cache flush in shmem_mfill_atomic_pte()
  mm: userfaultfd: fix missing cache flush in mcopy_atomic_pte() and
    __mcopy_atomic()
  mm: replace multiple dcache flush with flush_dcache_folio()

 mm/huge_memory.c | 3 ++-
 mm/hugetlb.c     | 3 ++-
 mm/memory.c      | 2 ++
 mm/migrate.c     | 3 +--
 mm/shmem.c       | 4 +++-
 mm/userfaultfd.c | 3 +++
 6 files changed, 13 insertions(+), 5 deletions(-)

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2.11.0