linux-kernel - Re: [RFC PATCH v6 00/12] livepatch: klp-convert tool

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Message-ID: <Yg0xmWaBDNVmCB3b@redhat.com>
Date:   Wed, 16 Feb 2022 12:17:13 -0500
From:   Joe Lawrence <joe.lawrence@...hat.com>
To:     live-patching@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-kbuild@...r.kernel.org
Subject: Re: [RFC PATCH v6 00/12] livepatch: klp-convert tool

On Wed, Feb 16, 2022 at 11:39:28AM -0500, Joe Lawrence wrote:
> 
> [ ... snip ... ]
> 
>  lib/livepatch/Makefile                        |  12 +
>  lib/livepatch/test_klp_convert.h              |  45 +
>  lib/livepatch/test_klp_convert1.c             | 121 +++
>  lib/livepatch/test_klp_convert2.c             | 110 +++
>  lib/livepatch/test_klp_convert_data.c         | 190 ++++
>  lib/livepatch/test_klp_convert_keys.c         |  91 ++
>  lib/livepatch/test_klp_convert_keys_mod.c     |  52 +
>  lib/livepatch/test_klp_convert_mod_a.c        |  31 +
>  lib/livepatch/test_klp_convert_mod_b.c        |  19 +
>  lib/livepatch/test_klp_convert_mod_c.c        |  36 +
>  lib/livepatch/test_klp_convert_sections.c     | 120 +++

A general (selftests) question: is there any build mechanism in the
kernel tree that is used to *expect* build failure?

Under certain circumstances, we would need klp-convert to fail and it
would be helpful to test for that.  At the moment I am considered out of
tree tests that could exercise the code this way, but definitely prefer
anything that is already in-tree.

Thanks,

-- Joe