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Subject: Re: [POC 11/23] livepatch: Safely detect forced transition when
 removing split livepatch modules
To:     Petr Mladek <pmladek@suse.com>, Jiri Kosina <jikos@kernel.org>,
        Josh Poimboeuf <jpoimboe@redhat.com>,
        Miroslav Benes <mbenes@suse.cz>
Cc:     Joe Lawrence <joe.lawrence@redhat.com>,
        Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>,
        Nicolai Stange <nstange@suse.de>,
        live-patching@vger.kernel.org, linux-kernel@vger.kernel.org
References: <20200117150323.21801-1-pmladek@suse.com>
 <20200117150323.21801-12-pmladek@suse.com>
From:   Julien Thierry <jthierry@redhat.com>
Message-ID: <2d92bc17-0844-54dd-b6ea-8d89ce2d590b@redhat.com>
Date:   Wed, 22 Jan 2020 10:15:11 +0000
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Hi Petr,

On 1/17/20 3:03 PM, Petr Mladek wrote:
> The information about forced livepatch transition is currently stored
> in struct klp_patch. But there is not any obvious safe way how to
> access it when the split livepatch modules are removed.
> 

If that's the only motivation to do this, klp_objects could have a 
reference to the klp_patch they are part of. This could easily be set 
when adding the klp_object to the klp_patch->obj_list in 
klp_init_object_early() .

Having this reference could also prove useful in future scenarios.

Cheers,

-- 
Julien Thierry