[PATCH 4/5] nvme: move the retries count to struct nvme_request

[Christoph Hellwig]

On Wed, Apr 05, 2017 at 11:14:30AM -0400, Keith Busch wrote:
> On Wed, Apr 05, 2017 at 04:18:55PM +0200, Christoph Hellwig wrote:
> > The way NVMe uses this field is entirely different from the older
> > SCSI/BLOCK_PC usage, so move it into struct nvme_request.
> > 
> > Also reduce the size of the file to a unsigned char so that we leave space
> > for additional smaller fields that will appear soon.
> 
> What new fields can we expect? Why temporarily pad the middle of the
> struct instead of appending to the end? The "result" packed nicely
> on 64-bit, at least.

I've got another u8 and a u16 in pending patches.  That being said
moving it to the end might make sense.