linux-kernel - Re: WARNING: CPU: 27 PID: 7051 at lib/math/int_log.c:63 intlog2+0xaa/0xe0 at running int_log

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Message-ID: <20260107214659.GA694817@noisy.programming.kicks-ass.net>
Date: Wed, 7 Jan 2026 22:46:59 +0100
From: Peter Zijlstra <peterz@...radead.org>
To: Kees Cook <kees@...nel.org>
Cc: Erhard Furtner <erhard_f@...lbox.org>, linux-kernel@...r.kernel.org,
	kunit-dev@...glegroups.com,
	Alessandro Carminati <acarmina@...hat.com>
Subject: Re: WARNING: CPU: 27 PID: 7051 at lib/math/int_log.c:63
 intlog2+0xaa/0xe0 at running int_log_kunit test (v6.15-rc1)

On Wed, Jan 07, 2026 at 12:35:10PM -0800, Kees Cook wrote:

> It seems like we have another case of needed to silence warnings under
> kunit[1]. Alessandro and Peter, where does the linked series stand
> currently?

Well, x86 and s390 now have BUG_FORMAT support and can do all of
WARN*() in __report_bug().

I'm thinking 'someone' wants to get ARM64 and Power implemented too to
cover all the 'big' architectures.

This in turn would enable those suppress-a-warn hacks to live in a
single place and not mess up code-gen.