[0/6] ITER_XARRAY cleanups and consequences

Message

Matthew Wilcox March 3, 2025, 5:53 p.m. UTC

iov_iter currently extracts pages from the xarray when only folios have
been stored there.  This needs to be fixed before we can separate struct
folio from struct page.  __readahead_batch() is in the same situation,
and converting all three of these places lets us remove find_subpage()
and thp_nr_pages().  Removing readahead_page_batch() isn't particularly
related to these changes, but it may as well go in with this batch.

Matthew Wilcox (Oracle) (6):
  iov_iter: Convert iter_xarray_populate_pages() to use folios
  iov_iter: Convert iov_iter_extract_xarray_pages() to use folios
  pagemap: Remove find_subpage()
  filemap: Convert __readahead_batch() to use a folio
  pagemap: Remove readahead_page_batch()
  mm: Delete thp_nr_pages()

 include/linux/mm.h      |  9 ---------
 include/linux/pagemap.h | 40 ++++++----------------------------------
 lib/iov_iter.c          | 30 +++++++++++++++---------------
 3 files changed, 21 insertions(+), 58 deletions(-)