linux-kernel - Re: [PATCH v2 12/14] selftests/nolibc: add tinyconfig target

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Message-ID: <20230722130759.GL17311@1wt.eu>
Date:   Sat, 22 Jul 2023 15:07:59 +0200
From:   Willy Tarreau <w@....eu>
To:     Zhangjin Wu <falcon@...ylab.org>
Cc:     thomas@...ch.de, arnd@...db.de, linux-kernel@...r.kernel.org,
        linux-kselftest@...r.kernel.org
Subject: Re: [PATCH v2 12/14] selftests/nolibc: add tinyconfig target

On Wed, Jul 19, 2023 at 09:30:30PM +0800, Zhangjin Wu wrote:
> The original tinyconfig target only enables minimal kernel config
> options, it can speed up the kernel build and nolibc test a lot and also
> brings us with smaller kernel image size.
> 
> But the default enabled options are not enough for qemu boot and console
> print, some additional config options should be added for every
> architecture individually.
> 
> Signed-off-by: Zhangjin Wu <falcon@...ylab.org>
> ---
>  tools/testing/selftests/nolibc/Makefile | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/tools/testing/selftests/nolibc/Makefile b/tools/testing/selftests/nolibc/Makefile
> index eec2935672ad..f42782fa78a9 100644
> --- a/tools/testing/selftests/nolibc/Makefile
> +++ b/tools/testing/selftests/nolibc/Makefile
> @@ -218,6 +218,9 @@ mrproper:
>  defconfig:
>  	$(Q)$(MAKE_KERNEL) $(DEFCONFIG) prepare
>  
> +tinyconfig:
> +	$(Q)$(MAKE_KERNEL) tinyconfig prepare

So for the same reasons as defconfig above, I'd actually keep mrproper
here. And if we figure that tinyconfig is never called by the user
directly but as a dependency from the makefile itself or scripts,
then we likely don't even need to create a visible entry for it.

Willy