linux-kernel - Re: [PATCH] mmc: sdhci-of-aspeed: test: Fix dependencies when KUNIT=m

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Date:   Mon, 18 Jul 2022 10:14:48 +0930
From:   "Andrew Jeffery" <andrew@...id.au>
To:     "David Gow" <davidgow@...gle.com>,
        "Brendan Higgins" <brendanhiggins@...gle.com>,
        "Daniel Latypov" <dlatypov@...gle.com>,
        "Shuah Khan" <skhan@...uxfoundation.org>,
        "Ulf Hansson" <ulf.hansson@...aro.org>,
        "Arnd Bergmann" <arnd@...db.de>
Cc:     linux-aspeed@...ts.ozlabs.org,
        linux-mmc <linux-mmc@...r.kernel.org>,
        "Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>,
        "kbuild test robot" <lkp@...el.com>,
        linux-kselftest@...r.kernel.org,
        "Sadiya Kazi" <sadiyakazi@...gle.com>, kunit-dev@...glegroups.com
Subject: Re: [PATCH] mmc: sdhci-of-aspeed: test: Fix dependencies when KUNIT=m



On Fri, 15 Jul 2022, at 13:33, David Gow wrote:
> While the sdhci-of-aspeed KUnit tests do work when builtin, and do work
> when KUnit itself is being built as a module, the two together break.
>
> This is because the KUnit tests (understandably) depend on KUnit, so a
> built-in test cannot build if KUnit is a module.
>
> Fix this by adding a dependency on (MMC_SDHCI_OF_ASPEED=m || KUNIT=y),
> which only excludes this one problematic configuration.
>
> This was reported on a nasty openrisc-randconfig run by the kernel test
> robot, though for some reason (compiler optimisations removing the test
> code?) I wasn't able to reproduce it locally on x86:
> https://lore.kernel.org/linux-mm/202207140122.fzhlf60k-lkp@intel.com/T/
>
> Fixes: 291cd54e5b05 ("mmc: sdhci-of-aspeed: test: Use kunit_test_suite() macro")
> Reported-by: kernel test robot <lkp@...el.com>
> Signed-off-by: David Gow <davidgow@...gle.com>
> ---
>  drivers/mmc/host/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
> index 10c563999d3d..e63608834411 100644
> --- a/drivers/mmc/host/Kconfig
> +++ b/drivers/mmc/host/Kconfig
> @@ -171,6 +171,7 @@ config MMC_SDHCI_OF_ASPEED
>  config MMC_SDHCI_OF_ASPEED_TEST
>  	bool "Tests for the ASPEED SDHCI driver" if !KUNIT_ALL_TESTS
>  	depends on MMC_SDHCI_OF_ASPEED && KUNIT
> +	depends on (MMC_SDHCI_OF_ASPEED=m || KUNIT=y)

Should this replace the line above? Isn't it just more constrained?

Regardless, thanks for your work here, the kunit integration with the 
ASPEED SDHCI driver bothered me a lot when I wrote it.

Andrew