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From: Masahiro Yamada <masahiroy@kernel.org>
Date: Sun, 28 Feb 2021 00:42:34 +0900
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Subject: Re: Latest Git kernel doesn't compile because of the
 LINUX_VERSION_CODE issue
To: Christophe Leroy <christophe.leroy@csgroup.eu>
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Cc: Sasha Levin <sashal@kernel.org>, Darren Stevens <darren@stevens-zone.net>,
 "R.T.Dickinson" <rtd2@xtra.co.nz>, Christian Zigotzky <chzigotzky@xenosoft.de>,
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 <linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org>

On Sat, Feb 27, 2021 at 4:34 PM Christophe Leroy
<christophe.leroy@csgroup.eu> wrote:
>
>
> Le 27/02/2021 =C3=A0 08:13, Christian Zigotzky a =C3=A9crit :
> > Hello Christophe,
> >
> > Thanks a lot for compiling the latest git kernel.
> >
> > I have solved the compiling issue through setting up a value for the SU=
BLEVEL variable in
> > "a/Makefile". Before it wasn't necessary to set up a value for the SUBL=
EVEL variable.
>
> I see, so it is a regression introduced by commit 9b82f13e7ef3 ("kbuild: =
clamp SUBLEVEL to 255").
>
> In the past there had already been such a regression at some point, which=
 had then been fixed by
> commit cacd54ef49b7 ("kbuild: Fix KERNELVERSION for empty SUBLEVEL or PAT=
CHLEVEL")
>
> Sasha, can you fix it ?



Thanks for catching this.

I submitted a patch:
https://lore.kernel.org/patchwork/patch/1385119/






> Thanks
> Christophe
>
>
> >
> > Cheers,
> > Christian
> >
> > On 26 February 21 at 5:10 pm, Christophe Leroy wrote:
> >>
> >>
> >> Le 26/02/2021 =C3=A0 13:34, Christian Zigotzky a =C3=A9crit :
> >>> Hello,
> >>>
> >>> I tried to compile the latest Git kernel today. Unfortunately it does=
n't compile.
> >>
> >> I have no such problem with latest git kernel.
> >>
> >> Christophe
> >>
> >>>
> >>> Error messages:
> >>>
> >>>    CC      arch/powerpc/kernel/udbg_16550.o
> >>> In file included from ./include/linux/stackprotector.h:10:0,
> >>>                   from arch/powerpc/kernel/smp.c:35:
> >>> ./arch/powerpc/include/asm/stackprotector.h: In function =E2=80=98boo=
t_init_stack_canary=E2=80=99:
> >>> ./arch/powerpc/include/asm/stackprotector.h:29:30: error: expected ex=
pression before =E2=80=98;=E2=80=99 token
> >>>    canary ^=3D LINUX_VERSION_CODE;
> >>>                                ^
> >>> scripts/Makefile.build:271: recipe for target 'arch/powerpc/kernel/sm=
p.o' failed
> >>> make[2]: *** [arch/powerpc/kernel/smp.o] Error 1
> >>>
> >>> ----
> >>>
> >>> drivers/media/cec/core/cec-api.c: In function =E2=80=98cec_adap_g_cap=
s=E2=80=99:
> >>> drivers/media/cec/core/cec-api.c:85:35: error: expected expression be=
fore =E2=80=98;=E2=80=99 token
> >>>    caps.version =3D LINUX_VERSION_CODE;
> >>>
> >>> ----
> >>>
> >>> I have found the bad commit. It's "Merge tag 'kbuild-v5.12' of
> >>> git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild"=
 [1]
> >>>
> >>> The changes in the Makefile (a/Makefile) are responsible for the comp=
iling errors. [2]
> >>>
> >>> I was able to revert this bad commit. After that it compiled without =
any problems.
> >>>
> >>> Could you please compile the latest Git kernel and confirm this issue=
?
> >>>
> >>> Thanks,
> >>> Christian
> >>>
> >>> [1]
> >>> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/co=
mmit/?id=3D6fbd6cf85a3be127454a1ad58525a3adcf8612ab
> >>>
> >>> [2]
> >>> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/di=
ff/Makefile?id=3D6fbd6cf85a3be127454a1ad58525a3adcf8612ab
> >>>



--=20
Best Regards
Masahiro Yamada