linux-kernel - Re: [PATCH 2/8] kbuild: Support for Symbols.list creation

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Date:   Mon, 4 Sep 2017 04:23:29 -0300
From:   Joao Moreira <jmoreira@...e.de>
To:     Joe Lawrence <joe.lawrence@...hat.com>
Cc:     live-patching@...r.kernel.org, linux-kernel@...r.kernel.org,
        mbenes@...e.cz, mmarek@...e.cz, pmladek@...e.com, jikos@...e.cz,
        nstange@...e.de, jroedel@...e.de, matz@...e.de,
        jpoimboe@...hat.com, khlebnikov@...dex-team.ru, jeyu@...nel.org
Subject: Re: [PATCH 2/8] kbuild: Support for Symbols.list creation

On 08/31/2017 12:24 PM, Joe Lawrence wrote:
> Hi Joao,
> 
Hi Joe and Josh,

Thanks for the quick feedback, I'll be looking forward for your comments 
once you have the change to dig deeper :). I'll apply all typo-fixes, 
add klpclean to the PHONY targets and change the quiet_cmd invocation as 
suggested in v2.

>> For identifying livepatches during the build process, a flag variable
>> LIVEPATCH_$(basetarget).o is considered in scripts/Makefile.build. This
>> way, set this flag for the livepatch sample Makefile in
>> samples/livepatch/Makefile.
> 
> I've never tried building a livepatch out of tree (is that even
> possible?) but does this make it any more/less harder?

Tbh, I never had tried it before, so I just emulated the process and it 
was simple and successful. All it required in addition to what is 
regular, was the introduction of the "LIVEPATCH_($bastarget).o := y" 
into the Makefile. All else was implicitly handled by Kbuild.

Best,
Joao