[PATCH v2 1/6] blk-mq: introduce blk_mq_set_request_complete

[Sagi Grimberg]

> In some scenarios, nvme need setting the state of request to
> MQ_RQ_COMPLETE. So add an inline function blk_mq_set_request_complete.
> For details, see the subsequent patches.

Its kinda difficult to understand the meaning of all of this...
the cover letter tells us nothing, and patches 1/2 also tells us
to see subsequent patches.

This is saved in the git change log history, so please try
describe what it is you are going with this, even if there are
overlaps between patches.