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

[Mike Snitzer]

On Mon, Aug 30 2010 at  5:58am -0400,
Tejun Heo <tj at kernel.org> 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 <snitzer at redhat.com>