atomic queue limits updates v3

[Martin K. Petersen]

Christoph,

> As the series is big enough it only converts two drivers - virtio_blk
> as a heavily used driver in virtualized setups, and loop as one that
> actually does runtime updates while being fairly simple. I plan to
> update most drivers for this merge window, although SCSI will probably
> have to wait for the next one given that it will need extensive API
> changes in the LLDD and ULD interfaces.

Looks nice in general and avoids the annoyances I had with my discovery
series wrt. discard. I'm in the process of rebasing that series to fit
on top of your changes and things get cleaned up nicely. We'll probably
have to coordinate the sd changes a bit.

Anyway. Great to finally get this resolved!

Reviewed-by: Martin K. Petersen <martin.petersen at oracle.com>

-- 
Martin K. Petersen	Oracle Linux Engineering