linux-kernel - Re: objtool warning in ice_free_prof

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Message-ID: <5874052.DvuYhMxLoT@natalenko.name>
Date: Mon, 07 Apr 2025 11:21:27 +0200
From: Oleksandr Natalenko <oleksandr@...alenko.name>
To: linux-kernel@...r.kernel.org,
 Przemek Kitszel <przemyslaw.kitszel@...el.com>
Cc: netdev@...r.kernel.org, intel-wired-lan@...ts.osuosl.org,
 Paolo Abeni <pabeni@...hat.com>, Jakub Kicinski <kuba@...nel.org>,
 Eric Dumazet <edumazet@...gle.com>, "David S. Miller" <davem@...emloft.net>,
 Andrew Lunn <andrew+netdev@...n.ch>,
 Tony Nguyen <anthony.l.nguyen@...el.com>,
 Peter Zijlstra <peterz@...radead.org>, Josh Poimboeuf <jpoimboe@...nel.org>
Subject: Re: objtool warning in ice_free_prof_mask

Hello.

On pondělí 7. dubna 2025 11:03:31, středoevropský letní čas Przemek Kitszel wrote:
> On 4/7/25 08:20, Oleksandr Natalenko wrote:
> > Hello.
> > 
> > With v6.15-rc1, CONFIG_OBJTOOL_WERROR=y and gcc 14.2.1 the following happens:
> 
> have you COMPILE_TEST'ed whole kernel and this is the only (new) error?

It's not a new warning, I've observe it for several recent major kernel releases already.

I do not build with CONFIG_COMPILE_TEST.

I've also realised I see this warning with -O3 only. I know this is unsupported, so feel free to ignore me, but I do -O3 builds for finding out possible loose ends in the code, and this is the only place where it breaks.

> > ```
> > drivers/net/ethernet/intel/ice/ice.o: error: objtool: ice_free_prof_mask.isra.0() falls through to next function ice_free_flow_profs.cold()
> > drivers/net/ethernet/intel/ice/ice.o: error: objtool: ice_free_prof_mask.isra.0.cold() is missing an ELF size annotation
> > ```
> > 
> > If I mark ice_write_prof_mask_reg() as noinline, this warning disappears.
> > 
> > Any idea what's going wrong?
> 
> sorry, no idea
> 
> > 
> > Thank you.

-- 
Oleksandr Natalenko, MSE
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