linux-kernel - Re: [PATCH v2 3/5] thunderbolt: test: Use kunit_test

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Date:   Wed, 22 Jun 2022 15:16:01 +0800
From:   David Gow <davidgow@...gle.com>
To:     Brendan Higgins <brendanhiggins@...gle.com>,
        Luis Chamberlain <mcgrof@...nel.org>,
        Jeremy Kerr <jk@...econstruct.com.au>,
        Daniel Latypov <dlatypov@...gle.com>,
        Shuah Khan <skhan@...uxfoundation.org>,
        Andrew Jeffery <andrew@...id.au>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Andra Paraschiv <andraprs@...zon.com>,
        Longpeng <longpeng2@...wei.com>
Cc:     Paraschiv@...gle.com,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        KUnit Development <kunit-dev@...glegroups.com>,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Maíra Canal <maira.canal@....br>,
        linux-mmc <linux-mmc@...r.kernel.org>,
        linux-aspeed <linux-aspeed@...ts.ozlabs.org>,
        OpenBMC Maillist <openbmc@...ts.ozlabs.org>,
        linux-usb@...r.kernel.org, linux-modules@...r.kernel.org,
        Matt Johnston <matt@...econstruct.com.au>
Subject: Re: [PATCH v2 3/5] thunderbolt: test: Use kunit_test_suite() macro

On Tue, Jun 21, 2022 at 4:54 PM David Gow <davidgow@...gle.com> wrote:
>
> The new implementation of kunit_test_suite() for modules no longer
> conflicts with module_init, so can now be used by the thunderbolt tests.
>
> Also update the Kconfig entry to enable the test when KUNIT_ALL_TESTS is
> enabled.
>
> This means that kunit_tool can now successfully run and parse the test
> results with, for example:
>         ./tools/testing/kunit/kunit.py run --arch=x86_64 \
>         --kconfig_add CONFIG_PCI=y --kconfig_add CONFIG_USB4=y \
>         'thunderbolt'
>
> Acked-by: Mika Westerberg <mika.westerberg@...ux.intel.com>
> Signed-off-by: David Gow <davidgow@...gle.com>
> ---
>
> Changes since v1:
> https://lore.kernel.org/linux-kselftest/20220618090310.1174932-4-davidgow@google.com/
> - Actually include the Kconfig changes, which were mistakenly added to
>   the next patch in the series in v1.
> - Add Acked-by tag from Mika Westerberg
>
> ---
>  drivers/thunderbolt/Kconfig  |  5 +++--
>  drivers/thunderbolt/domain.c |  3 ---
>  drivers/thunderbolt/tb.h     |  8 --------
>  drivers/thunderbolt/test.c   | 12 +-----------
>  4 files changed, 4 insertions(+), 24 deletions(-)
>
> diff --git a/drivers/thunderbolt/Kconfig b/drivers/thunderbolt/Kconfig
> index 4bfec8a28064..2a063d344b94 100644
> --- a/drivers/thunderbolt/Kconfig
> +++ b/drivers/thunderbolt/Kconfig
> @@ -28,8 +28,9 @@ config USB4_DEBUGFS_WRITE
>           this for production systems or distro kernels.
>
>  config USB4_KUNIT_TEST
> -       bool "KUnit tests"
> -       depends on KUNIT=y
> +       bool "KUnit tests" if !KUNIT_ALL_TESTS
> +       depends on KUNIT
> +       default KUNIT_ALL_TESTS
>

FYI: It turns out we can't just replace the "depends on KUNIT=y" with
"depends on KUNIT" here, as it's still possible to have CONFIG_USB4=y
and CONFIG_KUNIT=m, which would lead to missing KUnit symbols during
link.

What does work is adding, in addition to "depends on KUNIT":
depends on (USB4=m || KUNIT=y)

Which will prevent the tests from being enabled in this situation.

I'll wait another day or so before sending out a v3 with this fixed,
in case there are any other issues which arise.

Cheers,
-- David

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