linux-kernel - Re: New warning `cryptd: no symbol version for this_cpu

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Message-ID: <CAFULd4ZGWFN00AVQ3Y3yg4HJgdbb5o_hxERnskggFtxfCUBieA@mail.gmail.com>
Date: Thu, 3 Apr 2025 15:42:53 +0200
From: Uros Bizjak <ubizjak@...il.com>
To: Paul Menzel <pmenzel@...gen.mpg.de>
Cc: Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>, 
	Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org, 
	LKML <linux-kernel@...r.kernel.org>, regressions@...ts.linux.dev, 
	Brian Gerst <brgerst@...il.com>, Nadav Amit <nadav.amit@...il.com>, 
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: New warning `cryptd: no symbol version for this_cpu_off`

On Thu, Apr 3, 2025 at 3:20 PM Paul Menzel <pmenzel@...gen.mpg.de> wrote:
>
> Dear Uros,
>
>
> Am 03.04.25 um 15:14 schrieb Uros Bizjak:
> > On Thu, Apr 3, 2025 at 2:30 PM Paul Menzel <pmenzel@...gen.mpg.de> wrote:
> >>
> >> #regzbot ^introduced: 6a367577153a
> >>
> >> [To: +Uros, Cc: +Nadav, +Andrew]
>
> >> Am 03.04.25 um 09:35 schrieb Paul Menzel:
> >>
> >>> On the Intel Kaby Lake laptop Dell XPS 13 9360, updating from
> >>> 6.14.0-11270-g08733088b566 to 6.14.0-12456-gacc4d5ff0b61, Linux logs the
> >>> new warning below:
> >>>
> >>>       cryptd: no symbol version for this_cpu_off
> >>>
> >>> I haven’t bisected it, but could it be commit 06aa03056f90 (x86/smp:
> >>> Move this_cpu_off to percpu hot section). It says to have no functional
> >>> change though.
> >>
> >> `git bisect` led to commit 6a367577153a (percpu/x86: enable strict
> >> percpu checks via named AS qualifiers).
> >>
> >>       $ git bisect start
> >>       $ git bisect good 08733088b566
> >>       $ git bisect bad acc4d5ff0b61
> >
> > Can you please post your .config?
>
> Sorry, I didn’t attach it right away. It’s attached now.

Huh, it looks that modpost chokes on __seg_gs prefixed symbols.

WARNING: modpost: EXPORT symbol "this_cpu_off" [vmlinux] version
generation failed, symbol will not be versioned.
Is "this_cpu_off" prototyped in <asm/asm-prototypes.h>?

Uros.