# Re: \[PATCH v2 3/6\] block: add iopoll method to support bio-based IO polling

- From: Christoph Hellwig \<hch@infradead.org\>
- Date: 2021-01-28 08:42:04 
- List: linux-block
- Page: https://ratatoskr.run/linux-block/2021/01/6400594
- Thread: https://ratatoskr.run/linux-block/2021/01/6400532/t.md

```text
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.
```