linux-kernel - Re: [PATCH v6 1/3] kselftests: lib.mk: Add TEST_GEN_MODS

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Date: Mon, 22 Jan 2024 10:15:57 -0700
From: Shuah Khan <skhan@...uxfoundation.org>
To: Marcos Paulo de Souza <mpdesouza@...e.com>, Shuah Khan
 <shuah@...nel.org>, Jonathan Corbet <corbet@....net>,
 Heiko Carstens <hca@...ux.ibm.com>, Vasily Gorbik <gor@...ux.ibm.com>,
 Alexander Gordeev <agordeev@...ux.ibm.com>,
 Christian Borntraeger <borntraeger@...ux.ibm.com>,
 Sven Schnelle <svens@...ux.ibm.com>, Josh Poimboeuf <jpoimboe@...nel.org>,
 Jiri Kosina <jikos@...nel.org>, Miroslav Benes <mbenes@...e.cz>,
 Petr Mladek <pmladek@...e.com>, Joe Lawrence <joe.lawrence@...hat.com>,
 Shuah Khan <skhan@...uxfoundation.org>
Cc: linux-kselftest@...r.kernel.org, linux-doc@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-s390@...r.kernel.org,
 live-patching@...r.kernel.org
Subject: Re: [PATCH v6 1/3] kselftests: lib.mk: Add TEST_GEN_MODS_DIR variable

On 1/12/24 10:43, Marcos Paulo de Souza wrote:
> Add TEST_GEN_MODS_DIR variable for kselftests. It can point to
> a directory containing kernel modules that will be used by
> selftest scripts.
> 
> The modules are built as external modules for the running kernel.
> As a result they are always binary compatible and the same tests
> can be used for older or newer kernels.
> 
> The build requires "kernel-devel" package to be installed.
> For example, in the upstream sources, the rpm devel package
> is produced by "make rpm-pkg"
> 
> The modules can be built independently by
> 
>    make -C tools/testing/selftests/livepatch/
> 
> or they will be automatically built before running the tests via
> 
>    make -C tools/testing/selftests/livepatch/ run_tests
> 
> Note that they are _not_ built when running the standalone
> tests by calling, for example, ./test-state.sh.
> 
> Along with TEST_GEN_MODS_DIR, it was necessary to create a new install
> rule. INSTALL_MODS_RULE is needed because INSTALL_SINGLE_RULE would
> copy the entire TEST_GEN_MODS_DIR directory to the destination, even
> the files created by Kbuild to compile the modules. The new install
> rule copies only the .ko files, as we would expect the gen_tar to work.
> 
> Reviewed-by: Joe Lawrence <joe.lawrence@...hat.com>
> Reviewed-by: Petr Mladek <pmladek@...e.com>
> Signed-off-by: Marcos Paulo de Souza <mpdesouza@...e.com>
> ---
>   Documentation/dev-tools/kselftest.rst |  4 ++++
>   tools/testing/selftests/lib.mk        | 26 +++++++++++++++++++++-----


Hi Marcos,

I would like the doc patch and lib.mk patch separate. If lib.mk needs changes
we don't have to touch the doc patch.

thanks,
-- Shuah