[PATCH 3/4] iouring: remove IORING_URING_CMD_POLLED

[Keith Busch]

On Thu, Oct 19, 2023 at 07:41:05AM +0200, Christoph Hellwig wrote:
> Looks good and should probably go straight to the io_uring tree
> instead of being mixed up with the metadata changes.

The previos metadata patch removes the only user of the flag, so this
can't go in separately.

But if the driver needs to fallback to kernel bounce buffer for
unaligned or multi-page requests, I don't think I can easily get rid of
the iouring flag since the driver PDU doesn't have enough room to track
everything it needs.