[GIT PULL] io_uring passthrough support

[Christoph Hellwig]

On Mon, May 23, 2022 at 02:19:38PM -0600, Jens Axboe wrote:
> We can obviously dump this as it isn't integral to anything, and
> honestly now that the NVMe is wired up, there's no great need to have a
> separate test for it. But it doesn't really hurt and there are already
> regression tests for it.

Yes, please dump it.  It is not actually useful and is just more
code around for no good reason.