[GIT PULL] Btrfs fixes for 5.5-rc5

[David Sterba]

Hi,

a few fixes for btrfs:

* blkcg accounting problem with compression that could stall writes

* setting up blkcg bio for compression crashes due to NULL bdev pointer

* fix possible infinite loop in writeback for nocow files (here possible
  means almost impossible, 13 things that need to happen to trigger it)

Please pull, thanks.

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The following changes since commit fbd542971aa1e9ec33212afe1d9b4f1106cd85a1:

  btrfs: send: remove WARN_ON for readonly mount (2019-12-13 14:10:46 +0100)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux.git for-5.5-rc4-tag

for you to fetch changes up to de7999afedff02c6631feab3ea726a0e8f8c3d40:

  Btrfs: fix infinite loop during nocow writeback due to race (2019-12-30 16:13:20 +0100)

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Dennis Zhou (2):
      btrfs: punt all bios created in btrfs_submit_compressed_write()
      btrfs: fix compressed write bio blkcg attribution

Filipe Manana (1):
      Btrfs: fix infinite loop during nocow writeback due to race

 fs/btrfs/compression.c | 7 ++++++-
 fs/btrfs/inode.c       | 6 +++---
 2 files changed, 9 insertions(+), 4 deletions(-)