[PATCH v3 00/10] Convert several functions in page_io.c to use a folio

[Peng Zhang <zhangpeng362@huawei.com>]

From: ZhangPeng <zhangpeng362@huawei.com>

This patch series converts several functions in page_io.c to use a
folio, which can remove several implicit calls to compound_head().

Changelog:

v3:
- introduce bio_first_folio_all(), rather than replacing
  bio_first_page_all() per Matthew (patch 3)
- use a folio in __end_swap_bio_write() (patch 4)
- remove unneeded ifdefs per Matthew (patch 9)

v2:
- remove unneeded ClearPageUptodate() and SetPageError(), suggested by
  Matthew Wilcox
- convert bio_first_page_all() to bio_first_folio_all()
- convert PageTransHuge to folio_test_pmd_mappable per Matthew Wilcox

ZhangPeng (10):
  mm/page_io: remove unneeded ClearPageUptodate()
  mm/page_io: remove unneeded SetPageError()
  mm/page_io: introduce bio_first_folio_all()
  mm/page_io: use a folio in __end_swap_bio_write()
  mm/page_io: use a folio in __end_swap_bio_read()
  mm/page_io: use a folio in sio_read_complete()
  mm/page_io: use a folio in swap_writepage_bdev_sync()
  mm/page_io: use a folio in swap_writepage_bdev_async()
  mm/page_io: convert count_swpout_vm_event() to take in a folio
  mm/page_io: convert bio_associate_blkg_from_page() to take in a folio

 Documentation/block/biovecs.rst |  1 +
 include/linux/bio.h             |  5 +++
 mm/page_io.c                    | 63 +++++++++++++++------------------
 3 files changed, 35 insertions(+), 34 deletions(-)

-- 
2.25.1