[PATCH 1/5] blk-mq: Introduce blk_mq_reinit_tagset

[Steve Wise]

> From: Sagi Grimberg <sagi at grimberg.me>
> 
> The new nvme-rdma driver will need to reinitialize all the tags as part of
> the error recovery procedure (realloc the tag memory region). Add a helper
> in blk-mq for it that can iterate over all requests in a tagset to make
> this easier.
> 
> Signed-off-by: Sagi Grimberg <sagi at grimberg.me>
> Tested-by: Ming Lin <ming.l at ssi.samsung.com>
> Reviewed-by: Stephen Bates <Stephen.Bates at pmcs.com>
> Signed-off-by: Christoph Hellwig <hch at lst.de>

Looks fine.

Reviewed-by: Steve Wise <swise at opengridcomputing.com>