As mentioned last time around, this should be a REQ_NOWAIT flag so
that it can be easily passed down to the request layer.
> +static inline void bio_wouldblock_error(struct bio *bio)
> +{
> + bio->bi_error = -EAGAIN;
> + bio_endio(bio);
> +}
Please skip this helper..
> +#define QUEUE_FLAG_NOWAIT 28 /* queue supports BIO_NOWAIT */
Please make the flag name a little more descriptive, this sounds like
it will never wait.
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