linux-kernel - Re: [PATCH v2 3/4] Kbuild: Create intermediate vmlinux build with relocations preserved

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Message-ID: <CAMj1kXHoCgRu5werVnEJs+w4nkuiHA1SAyhwxqPyPF6Mk6Js3w@mail.gmail.com>
Date: Tue, 18 Mar 2025 09:27:29 +0100
From: Ard Biesheuvel <ardb@...nel.org>
To: Heiko Carstens <hca@...ux.ibm.com>
Cc: Masahiro Yamada <masahiroy@...nel.org>, kernel test robot <lkp@...el.com>, 
	Ard Biesheuvel <ardb+git@...gle.com>, linux-kernel@...r.kernel.org, llvm@...ts.linux.dev, 
	oe-kbuild-all@...ts.linux.dev, linux-kbuild@...r.kernel.org, x86@...nel.org, 
	Ingo Molnar <mingo@...nel.org>, Alexander Gordeev <agordeev@...ux.ibm.com>, 
	Vasily Gorbik <gor@...ux.ibm.com>, linux-s390@...r.kernel.org, linux-next@...r.kernel.org, 
	Stephen Rothwell <sfr@...b.auug.org.au>
Subject: Re: [PATCH v2 3/4] Kbuild: Create intermediate vmlinux build with
 relocations preserved

On Tue, 18 Mar 2025 at 09:18, Heiko Carstens <hca@...ux.ibm.com> wrote:
>
> On Thu, Mar 13, 2025 at 07:29:41PM +0900, Masahiro Yamada wrote:
> > On Thu, Mar 13, 2025 at 7:18 PM Ard Biesheuvel <ardb@...nel.org> wrote:
> > > On Thu, 13 Mar 2025 at 10:34, Ard Biesheuvel <ardb@...nel.org> wrote:
> > > > On Thu, 13 Mar 2025 at 10:21, kernel test robot <lkp@...el.com> wrote:
> > > > > kernel test robot noticed the following build errors:
> > > > >
> > > > > [auto build test ERROR on masahiroy-kbuild/for-next]
> > > > > [also build test ERROR on masahiroy-kbuild/fixes tip/x86/core s390/features linus/master v6.14-rc6 next-20250312]
> > > > > [If your patch is applied to the wrong git tree, kindly drop us a note.
> > > > > And when submitting patch, we suggest to use '--base' as documented in
> > > > > https://git-scm.com/docs/git-format-patch#_base_tree_information]
> > > > >
> > > > > url:    https://github.com/intel-lab-lkp/linux/commits/Ard-Biesheuvel/Kbuild-link-vmlinux-sh-Make-output-file-name-configurable/20250311-190926
> > > > > base:   https://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild.git for-next
> > > > > patch link:    https://lore.kernel.org/r/20250311110616.148682-9-ardb%2Bgit%40google.com
> > > > > patch subject: [PATCH v2 3/4] Kbuild: Create intermediate vmlinux build with relocations preserved
> > > > > config: x86_64-randconfig-076-20250313 (https://download.01.org/0day-ci/archive/20250313/202503131715.Fb6CfjhT-lkp@intel.com/config)
> > > > > compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
> > > > > reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250313/202503131715.Fb6CfjhT-lkp@intel.com/reproduce)
> > > > >
> > > > > If you fix the issue in a separate patch/commit (i.e. not just a new version of
> > > > > the same patch/commit), kindly add following tags
> > > > > | Reported-by: kernel test robot <lkp@...el.com>
> > > > > | Closes: https://lore.kernel.org/oe-kbuild-all/202503131715.Fb6CfjhT-lkp@intel.com/
> > > > >
> > > > > All errors (new ones prefixed by >>):
> > > > >
> > > > > >> gawk: scripts/generate_builtin_ranges.awk:82: fatal: cannot open file `vmlinux.map' for reading: No such file or directory
> > > > >
> > > >
> > > > Hmm it seems I missed some things in link-vmlinux.sh - I will take a look.
> > >
> > > We'd need something like the below applied on top - shall I send a v3?
> >
> > I will insert this before you patch set.
> > https://lore.kernel.org/linux-kbuild/20250313102604.1491732-1-masahiroy@kernel.org/T/#u
> ...
> > > --- a/scripts/link-vmlinux.sh
> > > +++ b/scripts/link-vmlinux.sh
> ...
> > > -vmlinux_link "${VMLINUX}"
> > > +vmlinux_link "${VMLINUX}" vmlinux.map
> > >
> > >  # fill in BTF IDs
> > >  if is_enabled CONFIG_DEBUG_INFO_BTF; then
>
> Building linux-next breaks on s390 with DEBUG_INFO_BTF enabled because
> of this; just where your addon patch ends:
>

Apologies for the breakage - this should already have been fixed in
the kbuild tree [0] but the fix does not appear to have landed yet.

[0] https://lore.kernel.org/all/202503161833.ytx1ivfu-lkp@intel.com


Masahiro?