On Tue, Jun 15, 2021 at 09:37:33AM -0400, Josef Bacik wrote:

Yeah I'd like to clean this up at some point, but that's outside the scope
of this patch.  I want to get a helper in without needing to run it by
everybody, we can take up cleaning this up at a later point with input from
everybody else.  Thanks,

But you _do_ need to run a new core writeback function past "everybody".
Just posting it on the btrfs list like for this series is definitely
not enough.