[PATCHv3 for-4.7] nvme: Remove RCU namespace protection

[Keith Busch]

On Wed, Jul 13, 2016 at 09:24:33AM -0700, Jens Axboe wrote:
> On 07/12/2016 07:22 PM, Christoph Hellwig wrote:
> >On Tue, Jul 12, 2016 at 04:15:13PM -0700, Jens Axboe wrote:
> >>I'm going back and forth on this... This isn't a regression for 4.7, is it?
> >>If so, I'd be a lot more comfortable queuing this up for 4.8 (marked stable)
> >>instead. It'll be another late addition, causing issues when it comes time
> >>to merge for-4.8/drivers in the next merge window.
> >
> >It's a 4.7 regression.
> 
> Two questions, then:
> 
> 1) Why isn't it marked as such? Should have a Fixes tag.

Sorry, my fault. I missed appending the "fixes" in later revisions as
this evovled. Should have:

  Reported-by: Ming Lin <mlin at kernel.org>
  [fixes 0bf77e9 nvme: switch to RCU freeing the namespace]

> 2) It's so large... Not really a question, other than, how can we make it
> smaller/more contained?

Fair enough. Part of the changes are not absolutely necessary (the
ordered insertion, for example). I'll resend a smaller patch with
the appropriate tags.