linux-kernel - Re: [PATCH v6] livepatch: introduce shadow variable API

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Message-ID: <alpine.LSU.2.21.1709131358120.27762@san.suse.cz>
Date:   Wed, 13 Sep 2017 14:00:37 +0200 (CEST)
From:   Miroslav Benes <mbenes@...e.cz>
To:     Joe Lawrence <joe.lawrence@...hat.com>
cc:     live-patching@...r.kernel.org, linux-kernel@...r.kernel.org,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Jessica Yu <jeyu@...hat.com>, Jiri Kosina <jikos@...nel.org>,
        Petr Mladek <pmladek@...e.com>
Subject: Re: [PATCH v6] livepatch: introduce shadow variable API

On Thu, 31 Aug 2017, Joe Lawrence wrote:

> Add exported API for livepatch modules:
> 
>   klp_shadow_get()
>   klp_shadow_alloc()
>   klp_shadow_get_or_alloc()
>   klp_shadow_free()
>   klp_shadow_free_all()
> 
> that implement "shadow" variables, which allow callers to associate new
> shadow fields to existing data structures.  This is intended to be used
> by livepatch modules seeking to emulate additions to data structure
> definitions.
> 
> See Documentation/livepatch/shadow-vars.txt for a summary of the new
> shadow variable API, including a few common use cases.
> 
> See samples/livepatch/livepatch-shadow-* for example modules that
> demonstrate shadow variables.
> 
> Signed-off-by: Joe Lawrence <joe.lawrence@...hat.com>

Acked-by: Miroslav Benes <mbenes@...e.cz>

I'd wait for Petr's review.

Thanks,
Miroslav