[NETNS] Oops in register_pernet_operations() with CONFIG_NET_NS=n

[Benjamin Thery]

Eric W. Biederman wrote:
> Benjamin Thery <benjamin.thery at bull.net> writes:
> 
>> Denis V. Lunev wrote:
>>> The patch attached should help. The idea is simple. The "init" should be
>>> called only once without NETNS. Period. No need for any lists.
>> This is the kind of idea I had but I didn't think it could be 
>> that simple. :) 
>> Thanks Denis.
> 
> It isn't.
> 
>>> I'll resend it to Dave after the ACK.
>> Tested on x86_64 with CONFIG_NET_NS=n and y. 
>> It fixes the issue we observed.
>>
>> Acked-by: Benjamin Thery <benjamin.thery at bull.net>
> 
> Try rmmod.

rmmod was part of my tests and it does work.
I did:

$ iptables --list

  modules x_tables, ip_tables & iptable_filter are loaded
  each calling register_pernet_subsys.

$ rmmod iptable_filter ip_tables x_tables

  No problem here

$ iptables --list

  To be sure I can load the modules again.


> 
> Eric
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