Re: [PATCH 1/6] blk-mq: when polling for IO, look for any completion

[Christoph Hellwig]

> -bool blk_poll(struct request_queue *q, blk_qc_t cookie)
> +int blk_poll(struct request_queue *q, blk_qc_t cookie)

Can you add a comment explaining the return value?

>  {
>       if (!q->poll_fn || !blk_qc_t_valid(cookie))
>               return false;

And false certainly isn't an integer constant..