[PATCH 0/6] hugetlb: normalize exported interfaces to use base-page indices

[Jane Chu]

This series stems from a discussion with David. [1]
The series makes a small cleanup to a few hugetlb interfaces used
outside the subsystem by standardizing them on base-page indices.
Hopefully this makes the interface semantics a bit more coherent with
the rest of mm, while the internal hugetlb code continue to use hugepage
indices where that remains the more natural fit.

It is based off mm-stable, 3/30/2026, b2c31180b9d6.

[1] https://lore.kernel.org/linux-mm/9ec9edd1-0f4c-4da2-ae78-0e7b251a9e25@xxxxxxxxxx/

Jane Chu (6):
  hugetlb: open-code hugetlb folio lookup index conversion
  hugetlb: remove the hugetlb_linear_page_index() helper
  hugetlb: make hugetlb_fault_mutex_hash() take PAGE_SIZE index
  hugetlb: drop vma_hugecache_offset() in favor of linear_page_index()
  hugetlb: make hugetlb_add_to_page_cache() use PAGE_SIZE-based index
  hugetlb: pass hugetlb reservation ranges in base-page indices

 Documentation/mm/hugetlbfs_reserv.rst |  12 +--
 fs/hugetlbfs/inode.c                  |  60 +++++++-------
 include/linux/hugetlb.h               |  31 +------
 mm/hugetlb.c                          | 112 ++++++++++++++------------
 mm/memfd.c                            |  18 +++--
 mm/userfaultfd.c                      |   6 +-
 6 files changed, 109 insertions(+), 130 deletions(-)

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2.43.5