[dm-devel] [PATCH v2 3/6] block: add iopoll method to support bio-based IO polling

[Christoph Hellwig]

On Mon, Jan 25, 2021 at 08:13:37PM +0800, Jeffle Xu wrote:
> +int blk_poll(struct request_queue *q, blk_qc_t cookie, bool spin)

Can you split the guts of this function into two separate helpers
for the mq vs non-mq case?  As is is is a little hard to read and
introduced extra branches in the fast path.