[GIT PULL] Folio fixes for 5.16

[Matthew Wilcox]

Hi Linus,

In the course of preparing the folio changes for iomap for next merge
window, we discovered some problems that would be nice to address now:

 - Renaming multi-page folios to large folios.
   mapping_multi_page_folio_support() is just a little too long, so
   we settled on mapping_large_folio_support().  That meant renaming,
   eg folio_test_multi() to folio_test_large().
 - I hadn't included folio wrappers for zero_user_segments(), etc.
   Also, multi-page^W^W large folio support is now independent of
   CONFIG_TRANSPARENT_HUGEPAGE, so machines with HIGHMEM always need to
   fall back to the out-of-line zero_user_segments().
 - The build bots finally got round to telling me that I missed a
   couple of architectures when adding flush_dcache_folio().  Christoph
   suggested that we just add linux/cacheflush.h and not rely on
   asm-generic/cacheflush.h.

These changes have been in linux-next for the last week with no new
squawks.

The following changes since commit 8ab774587903771821b59471cc723bba6d893942:

  Merge tag 'trace-v5.16-5' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace (2021-11-14 19:07:19 -0800)

are available in the Git repository at:

  git://git.infradead.org/users/willy/pagecache.git tags/folio-5.16b

for you to fetch changes up to c035713998700e8843c7d087f55bce3c54c0e3ec:

  mm: Add functions to zero portions of a folio (2021-11-18 15:05:56 -0500)

----------------------------------------------------------------
Fixes for 5.16 folios:

 - Fix compilation warnings on csky and sparc
 - Rename multipage folios to large folios
 - Rename AS_THP_SUPPORT and FS_THP_SUPPORT
 - Add functions to zero portions of a folio

----------------------------------------------------------------
Matthew Wilcox (Oracle) (6):
      Add linux/cacheflush.h
      mm: Rename folio_test_multi to folio_test_large
      mm: Remove folio_test_single
      fs: Remove FS_THP_SUPPORT
      fs: Rename AS_THP_SUPPORT and mapping_thp_support
      mm: Add functions to zero portions of a folio

 arch/arc/include/asm/cacheflush.h     |  1 -
 arch/arm/include/asm/cacheflush.h     |  1 -
 arch/m68k/include/asm/cacheflush_mm.h |  1 -
 arch/mips/include/asm/cacheflush.h    |  2 --
 arch/nds32/include/asm/cacheflush.h   |  1 -
 arch/nios2/include/asm/cacheflush.h   |  1 -
 arch/parisc/include/asm/cacheflush.h  |  1 -
 arch/sh/include/asm/cacheflush.h      |  1 -
 arch/xtensa/include/asm/cacheflush.h  |  3 ---
 fs/inode.c                            |  2 --
 include/asm-generic/cacheflush.h      |  6 -----
 include/linux/cacheflush.h            | 18 ++++++++++++++
 include/linux/fs.h                    |  1 -
 include/linux/highmem.h               | 47 +++++++++++++++++++++++++++++++----
 include/linux/page-flags.h            | 14 +++++------
 include/linux/pagemap.h               | 26 +++++++++++++++----
 mm/highmem.c                          |  2 --
 mm/memcontrol.c                       |  2 +-
 mm/shmem.c                            |  3 ++-
 mm/util.c                             |  2 +-
 20 files changed, 92 insertions(+), 43 deletions(-)
 create mode 100644 include/linux/cacheflush.h