[PATCH 1/3] block: introduce blk_mq_tagset_iter

[Bart Van Assche]

On Wed, 2017-09-06 at 18:30 +0300, Sagi Grimberg wrote:
> Iterator helper to apply a function on all the
> tags in a given tagset. export it as it will be used
> outside the block layer later on.

Thanks Sagi for having done this work.

Reviewed-by: Bart Van Assche <bart.vanassche at wdc.com>