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

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Message-ID: <CAADnVQKB1Ubr8ntTAb0Q6D1ek+2tLk1yJucLOXouaF_vMqP3GA@mail.gmail.com>
Date: Mon, 15 Dec 2025 17:37:44 -0800
From: Alexei Starovoitov <alexei.starovoitov@...il.com>
To: Ihor Solodrai <ihor.solodrai@...ux.dev>
Cc: Stephen Rothwell <sfr@...b.auug.org.au>, Daniel Borkmann <daniel@...earbox.net>, 
	Alexei Starovoitov <ast@...nel.org>, Andrii Nakryiko <andrii@...nel.org>, KernelCI bot <bot@...nelci.org>, 
	kernelci@...ts.linux.dev, kernelci-results@...ups.io, 
	Linux Regressions <regressions@...ts.linux.dev>, gus@...labora.com, 
	Linux-Next Mailing List <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 Mon, Dec 15, 2025 at 5:32 PM Ihor Solodrai <ihor.solodrai@...ux.dev> wrote:
>
> 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.

I removed the offending patch from bpf tree.