On Tue, Aug 24, 2021 at 01:05:18PM +0800, Anand Jain wrote:

Su Yue reported [1] warn() as a result of a race between the following two
threads,
  Thread-A: function stack leading to btrfs_prepare_sprout()
and
  Thread-B: function stack leading to btrfs_show_devname()

[1]  https://patchwork.kernel.org/project/linux-btrfs/patch/20210818041944.5793-1-l@damenly.su/

Anand Jain (4):
  btrfs: convert latest_bdev type to struct btrfs_device and rename
  btrfs: use latest_dev in btrfs_show_devname
  btrfs: update latest_dev when we sprout
  btrfs: fix comment about the btrfs_show_devname

Added to misc-next, with some minor fixups, thanks.