linux-kernel - Re: [PATCH 0/2] kbuild: userprogs: also inherit byte order and ABI from kernel

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Message-ID: <20250814184646.GA1764877@ax162>
Date: Thu, 14 Aug 2025 11:46:46 -0700
From: Nathan Chancellor <nathan@...nel.org>
To: Thomas Weißschuh <thomas.weissschuh@...utronix.de>
Cc: Nicolas Schier <nicolas.schier@...ux.dev>, linux-kbuild@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Masahiro Yamada <masahiroy@...nel.org>
Subject: Re: [PATCH 0/2] kbuild: userprogs: also inherit byte order and ABI
 from kernel

On Wed, Aug 13, 2025 at 07:43:39AM +0200, Thomas Weißschuh wrote:
> Make sure the byte order and ABI of the userprogs matches the one of the
> kernel, similar to how the bit size is handled.
> Otherwise the userprogs may not be executable.
> This happens for example on powerpc little endian, or riscv32.
> 
> These patches where originally part of my series "kunit: Introduce UAPI
> testing framework" [0], but that isn't going anywhere right now and the
> patches are useful on their own.
> 
> [0] kunit: Introduce UAPI testing framework
> ---
> Thomas Weißschuh (2):
>       kbuild: userprogs: avoid duplication of flags inherited from kernel
>       kbuild: userprogs: also inherit byte order and ABI from kernel

Seems reasonable to me. Should I fast track this via kbuild-fixes or
should I just apply it to kbuild-next? I am guessing you only noticed
this in the context of developing [0] so it might not be a big issue in
the wild?

Cheers,
Nathan