[RFC PATCH 0/8] fat: convert to iomap

[Matheus Alves de Almeida]

Hi,

This series converts fat to use iomap. It follows roughly the direction
suggested by https://docs.kernel.org/filesystems/iomap/porting.html,
with the exfat conversion series and related fixes as a reference.

Overall, the largest performance improvements were seen for extending
writes (~30%) and fallocate() (~18%).

Thanks,
Matheus

Matheus Alves de Almeida (8):
  fat: support FIEMAP
  fat: use iomap for ->bmap()
  fat: add iomap direct I/O support
  fat: clean stale bdev buffers of newly allocated clusters
  fat: drop ->write_begin() and ->write_end() usage from
    fat_cont_expand()
  fat: add iomap buffered I/O support
  fat: remove ->mmu_private
  fat: add multi-cluster allocation for write

 fs/fat/Kconfig  |   2 +-
 fs/fat/Makefile |   2 +-
 fs/fat/cache.c  |  95 ++++++++++-----
 fs/fat/dir.c    |   1 -
 fs/fat/fat.h    |  20 +--
 fs/fat/fatent.c |  67 ++++++++--
 fs/fat/file.c   | 316 ++++++++++++++++++++++++++++++++++++++----------
 fs/fat/inode.c  | 248 +++++--------------------------------
 fs/fat/iomap.c  | 180 +++++++++++++++++++++++++++
 9 files changed, 599 insertions(+), 332 deletions(-)
 create mode 100644 fs/fat/iomap.c

-- 
2.43.0