[PATCH] NVMe: Avoid caculate cq head doorbel in nvme_process_cq()

[Matthew Wilcox]

On Thu, Sep 05, 2013 at 04:55:43PM +0800, Haiyan Hu wrote:
> Your analysis is more comprehensive. Of course, I'd like to send a new patch that
> you advised. Do you think the updated variable named "db_stride_shift"?

I think that might have been a better name for the old meaning :-)  I think
we should probabaly keep the name as-is, but change the usage.  Unless
someone can come up with a better name ... ?