[PATCH v2 0/2] btrfs: minor fixes and cleanups on direct IO path

[Qu Wenruo <wqu@suse.com>]

[CHANGELOG]
v2:
- Drop the first 2 patches
  The problem with APPEND NOWAIT direct writes needs more consideration.
  If short writes happened for APPEND NOWAIT write, there are more
  factors to consider.

  Firstly we should return -EGAIN so that the caller can retry in a
  blocking way.

  Secondly we should fully revert what has been written so that isize is
  not increased.


  For the OE conflicts I have not yet hit with upstream, so it should be
  something wrong in my previous direct locking changes.

There are several small problems inside the direct IO code:

- Duplicated btrfs_dio_data::submitted
  The iomap_end() callback has @written parameter which provides the
  same value.

  Fixed in the third patch.

- Badly structured btrfs_dio_iomap_end()
  Refactored in the last patch.

Qu Wenruo (2):
  btrfs: remove btrfs_dio_data::submitted
  btrfs: refactor btrfs_dio_iomap_end()

 fs/btrfs/direct-io.c | 131 ++++++++++++++++++++++---------------------
 1 file changed, 66 insertions(+), 65 deletions(-)

-- 
2.54.0