[PATCH v2 3/4] nvme: enable SG gaps support

[Christoph Hellwig]

On Sun, Apr 23, 2017 at 12:45:39PM +0300, Sagi Grimberg wrote:
>> still would fit NVMe dword-alignment SGLs, though :)
>
> I would say its useful to have, but its only relevant to ioctls as
> normal io we explicitly on sub logical block size alignment.
>
> Anyways, I still think having ctrl->virt_boundary instead of
> ctrl->sg_gap_support is cleaner...

Ok, fine with me.