Revert "blk-mq: initialize req->q in allocation"

This reverts commit 6a3c8a3ac0.

We need selective clearing of the request to make the init-at-free
time completely safe. Otherwise we end up stomping on
rq->atomic_flags, which we don't want to do.
This commit is contained in:
Jens Axboe 2014-04-24 08:50:38 -06:00
commit 70ab0b2d51