On Wed, Jul 1, 2020 at 2:06 AM Christoph Hellwig [off-list ref] wrote:

Except for pktdvd, the only places setting congested bits are file
systems that allocate their own backing_dev_info structures.  And
pktdvd is a deprecated driver that isn't useful in stack setup
either.  So remove the dead congested_fn stacking infrastructure.

Signed-off-by: Christoph Hellwig <redacted>

For md bits:

Acked-by: Song Liu <redacted>