Re: [PATCH] net: Convert net_mutex into rw_semaphore and down read it on net->init/->exit

[Eric Dumazet]

On Tue, 2017-11-14 at 10:11 -0800, Stephen Hemminger wrote:
> On Tue, 14 Nov 2017 16:53:33 +0300
> Kirill Tkhai <ktkhai@xxxxxxxxxxxxx> wrote:
> 
> > +	/*
> > +	 * RCU-protected list, modifiable by pernet-init and -exit methods.
> > +	 * When net namespace is alive (net::count > 0), all the changes
> > +	 * are made under rw_sem held on write.
> > +	 */
> > +	struct list_head	fib_notifier_ops;
> >  
> 
> If you use __rcu annotation then it could be checked (and the comment is not needed).

I do not think we can use __rcu annotation yet on a struct list_head ?

(The annotation would be needed on the members)