Re: [PATCH] blk-mq: fix is_flush_rq

[Bart Van Assche <bvanassche@xxxxxxx>]

On 8/17/21 6:09 PM, Ming Lei wrote:
> +bool is_flush_rq(struct request *rq)
> +{
> +	return rq->end_io == flush_end_io;
> +}

My understanding is that calling is_flush_rq() is only safe if the
caller guarantees that the request refcount >= 1. How about adding a
comment that explains this?

Thanks,

Bart.