Re: [PATCH 2/5] dm: implement REQ_FLUSH/FUA support for bio-based dm

On Mon, Aug 30 2010 at  5:58am -0400,
Tejun Heo [off-list ref] wrote:

This patch converts bio-based dm to support REQ_FLUSH/FUA instead of
now deprecated REQ_HARDBARRIER.

* -EOPNOTSUPP handling logic dropped.

Can you expand on _why_ -EOPNOTSUPP handling is no longer needed?  And
please at it to the final patch header.

This removal isn't unique to DM's conversion to FLUSH+FUA but I couldn't
easily find the justification for its removal in the larger 30+ patch
patchset either -- other patches are terse on the removal too.

Other than that.

Acked-by: Mike Snitzer <redacted>