[GIT PULL] Btrfs fixes for 5.8-rc5, part 2

[David Sterba]

Hi,

please pull two refcounting fixes and one prepartory patch for upcoming
splice cleanup. Thanks.

- fix double put of block group with nodatacow

- fix missing block group put when remounting with discard=async

- explicitly set splice callback (no functional change), to ease
  integrating splice cleanup patches

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The following changes since commit 0465337c5599bbe360cdcff452992a1a6b7ed2d4:

  btrfs: reset tree root pointer after error in init_tree_roots (2020-07-02 10:27:12 +0200)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux.git for-5.8-rc4-tag

for you to fetch changes up to d77765911385b65fc82d74ab71b8983cddfe0b58:

  btrfs: wire up iter_file_splice_write (2020-07-09 19:57:58 +0200)

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Christoph Hellwig (1):
      btrfs: wire up iter_file_splice_write

Josef Bacik (1):
      btrfs: fix double put of block group with nocow

Qu Wenruo (1):
      btrfs: discard: add missing put when grabbing block group from unused list

 fs/btrfs/discard.c | 1 +
 fs/btrfs/file.c    | 1 +
 fs/btrfs/inode.c   | 9 +--------
 3 files changed, 3 insertions(+), 8 deletions(-)