linux-kernel - Re: [PATCH v13 05/12] livepatch: Refuse to unload only livepatches available during a forced transition

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Message-ID: <20181018120947.py36o462zdqjknsm@pathway.suse.cz>
Date:   Thu, 18 Oct 2018 14:09:47 +0200
From:   Petr Mladek <pmladek@...e.com>
To:     Josh Poimboeuf <jpoimboe@...hat.com>
Cc:     Jiri Kosina <jikos@...nel.org>, Miroslav Benes <mbenes@...e.cz>,
        Jason Baron <jbaron@...mai.com>,
        Joe Lawrence <joe.lawrence@...hat.com>,
        Evgenii Shatokhin <eshatokhin@...tuozzo.com>,
        live-patching@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v13 05/12] livepatch: Refuse to unload only livepatches
 available during a forced transition

On Wed 2018-10-17 13:35:19, Josh Poimboeuf wrote:
> I'm having trouble parsing the subject.  How about:
> 
>   Allow unloading of patches added after using 'force'

ok

> > --- a/kernel/livepatch/core.c
> > +++ b/kernel/livepatch/core.c
> > @@ -45,7 +45,8 @@
> >   */
> >  DEFINE_MUTEX(klp_mutex);
> >  
> > -static LIST_HEAD(klp_patches);
> > +/* Registered patches */
> > +LIST_HEAD(klp_patches);
> 
> Instead of making this non-static, can we just move
> klp_force_transition() to core.c?  It's nice to have all the list
> management code encapsulated in the same file.

Come on! We need it just to iterate over a list of available
livepatches. The logic used to manage this list is trivial.
klp_force_transition() itself is more complicated and it
logically fits into transitions.c.

I do not want to fight over this. If you resist, I'll move it.
I just wanted to share my view.

Best Regards,
Petr