netdev - Re: [REGRESSION] next/pending-fixes: (build) error: unknown warning option '-Wno-suggest-attribute=format'; did...

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Message-ID: <3cd2c37e-458f-409c-86e9-cd3c636fb071@linux.dev>
Date: Mon, 15 Dec 2025 17:31:42 -0800
From: Ihor Solodrai <ihor.solodrai@...ux.dev>
To: Stephen Rothwell <sfr@...b.auug.org.au>,
 Daniel Borkmann <daniel@...earbox.net>, Alexei Starovoitov <ast@...nel.org>,
 Andrii Nakryiko <andrii@...nel.org>
Cc: KernelCI bot <bot@...nelci.org>, kernelci@...ts.linux.dev,
 kernelci-results@...ups.io, regressions@...ts.linux.dev, gus@...labora.com,
 linux-next@...r.kernel.org, bpf <bpf@...r.kernel.org>,
 Networking <netdev@...r.kernel.org>,
 Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: Re: [REGRESSION] next/pending-fixes: (build) error: unknown warning
 option '-Wno-suggest-attribute=format'; did...

On 12/15/25 5:25 PM, Stephen Rothwell wrote:
> Hi all,
> 
> On Mon, 15 Dec 2025 23:59:03 -0000 KernelCI bot <bot@...nelci.org> wrote:
>>
>> Hello,
>>
>> New build issue found on next/pending-fixes:
>>
>> ---
>>  error: unknown warning option '-Wno-suggest-attribute=format'; did you mean '-Wno-property-attribute-mismatch'? [-Werror,-Wunknown-warning-option] in kernel/bpf/helpers.o (scripts/Makefile.build:287) [logspec:kbuild,kbuild.compiler.error]
>> ---
>>
>> - dashboard: https://d.kernelci.org/i/maestro:32e32983183c2c586f588a4a3a7cda83311d5be9
>> - giturl: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
>> - commit HEAD:  326785a1dd4cea4065390fb99b0249781c9912bf
>>
>>
>> Please include the KernelCI tag when submitting a fix:
>>
>> Reported-by: kernelci.org bot <bot@...nelci.org>
>>
>>
>> Log excerpt:
>> =====================================================
>>   CC      kernel/bpf/helpers.o
>> error: unknown warning option '-Wno-suggest-attribute=format'; did you mean '-Wno-property-attribute-mismatch'? [-Werror,-Wunknown-warning-option]
>>
>> =====================================================
>>
>>
>> # Builds where the incident occurred:
>>
>> ## defconfig on (arm64):
>> - compiler: clang-21
>> - config: https://files.kernelci.org/kbuild-clang-21-arm64-mainline-694097d2cbfd84c3cdba292d/.config
>> - dashboard: https://d.kernelci.org/build/maestro:694097d2cbfd84c3cdba292d
>>
>>
>> #kernelci issue maestro:32e32983183c2c586f588a4a3a7cda83311d5be9
>>
>> --
>> This is an experimental report format. Please send feedback in!
>> Talk to us at kernelci@...ts.linux.dev
>>
>> Made with love by the KernelCI team - https://kernelci.org
>>
> 
> Presumably caused by commit
> 
>  ba34388912b5 ("bpf: Disable false positive -Wsuggest-attribute=format warning")

Hi Stephen,

A potential hotfix is here:
https://lore.kernel.org/bpf/d80c77cf-c570-4f3b-960f-bbd2d0316fac@linux.dev/

Needs acks/nacks.

> 
> in the bpf tree.