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Subject[PATCH v2 00/28] iomap/xfs folio patches
This patchset converts XFS & iomap to use folios, and gets them to a
state where they can handle multi-page folios. Applying these patches
is not yet sufficient to actually start using multi-page folios for
XFS; more page cache changes are needed. I don't anticipate needing to
touch XFS again until we're at the point where we want to convert the
aops to be type-safe. It completes an xfstests run with no unexpected
failures. Most of these patches have been posted before and I've retained
acks/reviews where I thought them reasonable. Some patches are new.

- Added review tags from Jens, Darrick & Christoph (thanks!)
- Added folio_zero_* wrappers around zero_user_*()
- Added a patch to rename AS_THP_SUPPORT
- Added a patch to convert __block_write_begin_int() to take a folio
- Split the iomap_add_to_ioend() patch into three
- Updated changelog of bio_add_folio() (Jens)
- Adjusted whitespace of bio patches (Christoph, Jens)
- Improved changelog of readahead conversion to explain why the put_page()
disappeared (Christoph)
- Add a patch to zero an entire folio at a time, instead of limiting to
a page
- Switch pos & end_pos back to being u64 from loff_t
- Call block_write_end() and ->page_done with the head page of the folio,
as that's what those functions expect.

I intend to push patch 1 upstream myself (before 5.16), but I've included
it here to avoid nasty messages from the build-bots. I can probably
persuade Linus to take patches 2-4 as well if Darrick's not comfortable
taking them as part of the iomap changes.

These changes are also available at:
git:// heads/folio-iomap

I intend to rebase that branch to include any further R-b tags (some of
the patches are new and don't have reviews).

Matthew Wilcox (Oracle) (28):
csky,sparc: Declare flush_dcache_folio()
mm: Add functions to zero portions of a folio
fs: Rename AS_THP_SUPPORT and mapping_thp_support
block: Add bio_add_folio()
block: Add bio_for_each_folio_all()
fs/buffer: Convert __block_write_begin_int() to take a folio
iomap: Convert to_iomap_page to take a folio
iomap: Convert iomap_page_create to take a folio
iomap: Convert iomap_page_release to take a folio
iomap: Convert iomap_releasepage to use a folio
iomap: Add iomap_invalidate_folio
iomap: Pass the iomap_page into iomap_set_range_uptodate
iomap: Convert bio completions to use folios
iomap: Use folio offsets instead of page offsets
iomap: Convert iomap_read_inline_data to take a folio
iomap: Convert readahead and readpage to use a folio
iomap: Convert iomap_page_mkwrite to use a folio
iomap: Convert __iomap_zero_iter to use a folio
iomap: Convert iomap_write_begin() and iomap_write_end() to folios
iomap: Convert iomap_write_end_inline to take a folio
iomap,xfs: Convert ->discard_page to ->discard_folio
iomap: Simplify iomap_writepage_map()
iomap: Simplify iomap_do_writepage()
iomap: Convert iomap_add_to_ioend() to take a folio
iomap: Convert iomap_migrate_page() to use folios
iomap: Support multi-page folios in invalidatepage
xfs: Support multi-page folios

Documentation/core-api/kernel-api.rst | 1 +
arch/csky/abiv1/inc/abi/cacheflush.h | 1 +
arch/csky/abiv2/inc/abi/cacheflush.h | 2 +
arch/sparc/include/asm/cacheflush_32.h | 1 +
arch/sparc/include/asm/cacheflush_64.h | 1 +
block/bio.c | 22 ++
fs/buffer.c | 22 +-
fs/inode.c | 2 -
fs/internal.h | 2 +-
fs/iomap/buffered-io.c | 506 +++++++++++++------------
fs/xfs/xfs_aops.c | 24 +-
fs/xfs/xfs_icache.c | 2 +
include/linux/bio.h | 56 ++-
include/linux/fs.h | 1 -
include/linux/highmem.h | 44 ++-
include/linux/iomap.h | 3 +-
include/linux/pagemap.h | 26 +-
mm/highmem.c | 2 -
mm/shmem.c | 3 +-
19 files changed, 431 insertions(+), 290 deletions(-)


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