On Mon, 19 Feb 2018 12:58:38 +0300
Kirill Tkhai <ktk...@virtuozzo.com> wrote:

> +     struct list_head        exit_list;      /* To linked to call pernet exit
> +                                              * methods on dead net (net_sem
> +                                              * read locked), or to 
> unregister
> +                                              * pernet ops (net_sem wr 
> locked).
> +                                              */

Sorry, that comment is completely unparseable.
Either you know what it does, and therefore comment is unnecessary
Or change comment to a valid explanation of the semantics of the list.

Maybe comments about locking model are best left to where
it is used in the code.

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