On Fri, Nov 10, 2017 at 08:22:32AM -0700, Jens Axboe wrote:

Actually, double checking, one of them is a little suspicious:

        if (a == &dev_attr_uuid.attr) {
<<<<<<< HEAD
                if (uuid_is_null(&ns->uuid) &&
                    !memchr_inv(ns->nguid, 0, sizeof(ns->nguid)))
=======
                if (uuid_is_null(&ids->uuid) ||
                    !memchr_inv(ids->nguid, 0, sizeof(ids->nguid)))

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34a9690712aa386fb5fa9e3b8fb44a22f5f2aec6

                        return 0;
        }

with the previous copy using is_null && memchr_inv, the change to ids
makes it an OR instead. I'm going with the latter, but thought I'd bring
it up.

The && from master is the right one, it comes from:

ommit 007a61ae2f35c7fcf767313285c4924e81f11983
Author: Martin Wilck [off-list ref]
Date:   Thu Sep 28 21:33:23 2017 +0200

    nvme: fix visibility of "uuid" ns attribute

and needs to be logically applied to the new code as well.