linux-kernel - Re: [PATCH v2 1/1] hung_task: fix warnings caused by unaligned lock pointers

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Message-ID: <CAMuHMdV5o0mA50yeEfG9cH-YUZspEd-OVSDJP-q+H+bxbqm-KQ@mail.gmail.com>
Date: Thu, 9 Oct 2025 09:11:06 +0200
From: Geert Uytterhoeven <geert@...ux-m68k.org>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Lance Yang <lance.yang@...ux.dev>, Eero Tamminen <oak@...sinkinet.fi>, 
	Kent Overstreet <kent.overstreet@...ux.dev>, amaindex@...look.com, anna.schumaker@...cle.com, 
	boqun.feng@...il.com, ioworker0@...il.com, joel.granados@...nel.org, 
	jstultz@...gle.com, leonylgao@...cent.com, linux-kernel@...r.kernel.org, 
	linux-m68k@...ts.linux-m68k.org, longman@...hat.com, mhiramat@...nel.org, 
	mingo@...hat.com, mingzhe.yang@...com, peterz@...radead.org, 
	rostedt@...dmis.org, Finn Thain <fthain@...ux-m68k.org>, senozhatsky@...omium.org, 
	tfiga@...omium.org, will@...nel.org, stable@...r.kernel.org
Subject: Re: [PATCH v2 1/1] hung_task: fix warnings caused by unaligned lock pointers

Hi Andrew,

On Thu, 9 Oct 2025 at 06:04, Andrew Morton <akpm@...ux-foundation.org> wrote:
> On Thu, 9 Oct 2025 10:01:18 +0800 Lance Yang <lance.yang@...ux.dev> wrote:
> > I think we fundamentally disagree on whether this fix for known
> > false-positive warnings is needed for -stable.
>
> Having the kernel send scary warnings to our users is really bad
> behavior.  And if we don't fix it, people will keep reporting it.

As the issue is present in v6.16 and v6.17, I think that warrants -stable.

> And removing a WARN_ON is a perfectly good way of fixing it.  The
> kernel has 19,000 WARNs, probably seven of which are useful :(

Right. And there is panic_on_warn...

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds