linux-kernel - Re: Build Failure on linux-next (next-20250407)

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Message-ID: <CAMj1kXEfBMczOmA2+dMMubuD-qE59GTAiV2E_9m8KNG4-rgP6Q@mail.gmail.com>
Date: Wed, 9 Apr 2025 08:06:59 +0200
From: Ard Biesheuvel <ardb@...nel.org>
To: "Borah, Chaitanya Kumar" <chaitanya.kumar.borah@...el.com>
Cc: "linux-efi@...r.kernel.org" <linux-efi@...r.kernel.org>, "x86@...nel.org" <x86@...nel.org>, 
	"intel-gfx@...ts.freedesktop.org" <intel-gfx@...ts.freedesktop.org>, 
	"intel-xe@...ts.freedesktop.org" <intel-xe@...ts.freedesktop.org>, "Saarinen, Jani" <jani.saarinen@...el.com>, 
	"Kurmi, Suresh Kumar" <suresh.kumar.kurmi@...el.com>, 
	"De Marchi, Lucas" <lucas.demarchi@...el.com>, 
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: Build Failure on linux-next (next-20250407)

On Wed, 9 Apr 2025 at 07:01, Borah, Chaitanya Kumar
<chaitanya.kumar.borah@...el.com> wrote:
>
> Hello Ard,
>
> Hope you are doing well. I am Chaitanya from the linux graphics team in Intel.
>
> This mail is regarding a build failure we are seeing in our CI runs[1] on linux-next repository.
>
> Since the version next-20250407[2], we are seeing the following build error.
>
> `````````````````````````````````````````````````````````````````````````````````
> CALL    scripts/checksyscalls.sh
>   DESCEND objtool
>   INSTALL libsubcmd_headers
>   AS      arch/x86/boot/startup/efi-mixed.o
> arch/x86/boot/startup/efi-mixed.o: error: objtool: efi64_stub_entry(): can't find starting instruction
> make[3]: *** [scripts/Makefile.build:335: arch/x86/boot/startup/efi-mixed.o] Error 255
> make[3]: *** Deleting file 'arch/x86/boot/startup/efi-mixed.o'
> make[2]: *** [scripts/Makefile.build:461: arch/x86/boot/startup] Error 2
> make[1]: *** [/home/kbuild2/kernel/Makefile:2006: .] Error 2
> make: *** [Makefile:248: __sub-make] Error 2
> `````````````````````````````````````````````````````````````````````````````````
>
> After bisecting the tree, the following patch [3] seems to be the first "bad" commit
>
> `````````````````````````````````````````````````````````````````````````````````````````````````````````
> commit 4f2d1bbc2c92a32fd612e6c3b51832d5c1c3678e
> Author: Ard Biesheuvel mailto:ardb@...nel.org
> Date:   Tue Apr 1 15:34:20 2025 +0200
>
>     x86/boot: Move the EFI mixed mode startup code back under arch/x86, into startup/
> `````````````````````````````````````````````````````````````````````````````````````````````````````````
>
> We also verified that if we revert the patch the issue is not seen.
>
> Another observation is that build passes when run on "Ubuntu 20.04", in contrast our CI systems uses "Ubuntu 24.04".
>
> Could you please check why the patch causes this regression and provide a fix if necessary?
>

This should fix it. Please reply to the patch with a tested-by if it
fixes the issue for you.

https://lore.kernel.org/linux-efi/20250408085254.836788-10-ardb+git@google.com/T/#u