[PATCH 14/16] block: switch polling to be bio based

[Christoph Hellwig]

On Fri, Oct 15, 2021 at 10:30:26AM +0200, Pankaj Raghav wrote:
> > @@ -568,7 +569,8 @@ blk_status_t errno_to_blk_status(int errno);
> >  #define BLK_POLL_ONESHOT		(1 << 0)
> >  /* do not sleep to wait for the expected completion time */
> >  #define BLK_POLL_NOSLEEP		(1 << 1)
> Minor comment: Could we also have a flag #define BLK_POLL_SPIN 0?
> It can improve the readability from the caller side instead of having
> just a 0 to indicate spinning.

The above are flags, so adding a define for a value is a bit counter
productive.