linux-kernel - Re: [PATCH v3 0/3] kbuild: remove gcc's -Wtype-limits

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Message-Id: <176765740692.3236304.10853846154010651497.b4-ty@kernel.org>
Date: Mon, 05 Jan 2026 16:56:46 -0700
From: Nathan Chancellor <nathan@...nel.org>
To: Nathan Chancellor <nathan@...nel.org>, Nicolas Schier <nsc@...nel.org>, 
 Nick Desaulniers <nick.desaulniers+lkml@...il.com>, 
 Bill Wendling <morbo@...gle.com>, Justin Stitt <justinstitt@...gle.com>, 
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
 David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>, 
 Chris Mason <clm@...com>, David Sterba <dsterba@...e.com>, 
 Kees Cook <kees@...nel.org>, "Gustavo A. R. Silva" <gustavoars@...nel.org>, 
 Vincent Mailhol <mailhol@...nel.org>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>, 
 linux-kbuild@...r.kernel.org, linux-sparse@...r.kernel.org, 
 linux-kernel@...r.kernel.org, llvm@...ts.linux.dev, 
 dri-devel@...ts.freedesktop.org, linux-btrfs@...r.kernel.org, 
 linux-hardening@...r.kernel.org
Subject: Re: [PATCH v3 0/3] kbuild: remove gcc's -Wtype-limits

On Sat, 20 Dec 2025 12:02:18 +0100, Vincent Mailhol wrote:
> I often read on the mailing list people saying "who cares about W=2
> builds anyway?". At least I do. Not that I want to fix all of them,
> but on some occasions, such as new driver submissions, I have often
> found a couple valid diagnostics in the W=2 output.
> 
> That said, the annoying thing is that W=2 is heavily polluted by one
> warning: -Wtype-limits. Try a gcc W=2 build on any file and see the
> results for yourself. I suspect this to be the reason why so few
> people are using W=2.
> 
> [...]

Applied to

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

Thanks!

[1/3] kbuild: remove gcc's -Wtype-limits
      https://git.kernel.org/kbuild/c/660e899103e29
[2/3] kbuild: cleanup local -Wno-type-limits exceptions
      https://git.kernel.org/kbuild/c/34a1bd0b6b2c0
[3/3] overflow: Remove is_non_negative() and is_negative()
      https://git.kernel.org/kbuild/c/5ce3218d4f102

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.

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