linux-kernel - Re: [PATCH 0/2] kbuild, uapi: Mark inner unions in packed structs as packed

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Message-Id: <176860117992.3208640.15511985701328893417.b4-ty@kernel.org>
Date: Fri, 16 Jan 2026 15:06:19 -0700
From: Nathan Chancellor <nathan@...nel.org>
To: "K. Y. Srinivasan" <kys@...rosoft.com>, 
 Haiyang Zhang <haiyangz@...rosoft.com>, Wei Liu <wei.liu@...nel.org>, 
 Dexuan Cui <decui@...rosoft.com>, Long Li <longli@...rosoft.com>, 
 Nathan Chancellor <nathan@...nel.org>, 
 Nick Desaulniers <nick.desaulniers+lkml@...il.com>, 
 Bill Wendling <morbo@...gle.com>, Justin Stitt <justinstitt@...gle.com>, 
 Hans de Goede <hansg@...nel.org>, Arnd Bergmann <arnd@...db.de>, 
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
 Thomas Weißschuh <thomas.weissschuh@...utronix.de>
Cc: linux-hyperv@...r.kernel.org, linux-kernel@...r.kernel.org, 
 llvm@...ts.linux.dev, kernel test robot <lkp@...el.com>
Subject: Re: [PATCH 0/2] kbuild, uapi: Mark inner unions in packed structs
 as packed

On Thu, 15 Jan 2026 08:35:43 +0100, Thomas Weißschuh wrote:
> The unpacked unions within a packed struct generates alignment warnings
> on clang for 32-bit ARM.
> 
> With the recent changes to compile-test the UAPI headers in more cases,
> these warning in combination with CONFIG_WERROR breaks the build.
> 
> Fix the warnings.
> 
> [...]

Applied to

  https://git.kernel.org/pub/scm/linux/kernel/git/kbuild/linux.git kbuild-next

Thanks!

[1/2] hyper-v: Mark inner union in hv_kvp_exchg_msg_value as packed
      https://git.kernel.org/kbuild/c/1e5271393d777
[2/2] virt: vbox: uapi: Mark inner unions in packed structs as packed
      https://git.kernel.org/kbuild/c/c25d01e1c4f2d

Please look out for regression or issue reports or other follow up
comments, as they may result in the patch/series getting dropped or
reverted. Patches applied to an "unstable" branch are accepted pending
wider testing in -next and any post-commit review; they will generally
be moved to the main branch in a week if no issues are found.

Best regards,
-- 
Nathan Chancellor <nathan@...nel.org>