[RFC 1/5] user namespaces: Add a user_namespace as creator/owner of uts_namespace

[Eric W. Biederman]

Greg KH <greg at kroah.com> writes:

>> There are also major benefits to have the version of something that is
>> never freed never going away, because it means you can just reference it
>> in code.  So while I would be happy to say this is special don't use a
>> kref and roll the reference counting logic by hand, we aren't
>> dynamically allocating init_uts_ns any time soon.
>
> Why have a reference count at all if it's not needed or used here?

We have to reference count every other uts namespace.

Eric