Re: [REGRESSION] mainline/master: (build) in arch/arm/kernel/entry-common.o (/tmp/kci/linux/scripts/Makefile...

On Tue, Aug 18, 2026 at 09:19:04AM -0700, Nick Desaulniers wrote:
> + Ard
> 
> On Mon, Aug 17, 2026 at 11:00 PM Thorsten Leemhuis
> <[email protected]> wrote:
> > Nathan, Nick, do you still care about clang problems like this?
> 
> Yes, from the logs, it looks like ARCH=arm allmodconfig with clang-21
> (perhaps, there's a funny warning about the compiler version in the
> logs).
> 
> > And do
> > you by chance know what's wrong here?
> >
> > """
> > <instantiation>:2:11: error: out of range pc-relative fixup value
> >  ldr r10, =__per_cpu_offset
> >           ^
> > <instantiation>:2:11: error: out of range pc-relative fixup value
> >  ldr tsk, =__current
> >           ^
> > <instantiation>:2:11: error: out of range pc-relative fixup value
> >  ldr tsk, =__current
> >           ^
> 
> Smells like the same problem that was addressed by
> commit 5fe41793bc78 ("ARM: 9176/1: avoid literal references in inline assembly")
> 
> What tree was being tested? 5fe41793bc78 landed in v5.18-rc1. Whatever
> was being tested is probably missing that patch.

As Mark notes, this is mainline. This error is visible with LLVM 23 as
well. I bisected it to commit 79d27fd71854 ("arch: hookup fchroot()
system call").

  # bad: [0f23d56f17fdfc7db69d51f64c8b91bbab947aa9] Merge tag 'linux_kselftest-next-7.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
  # good: [8d3ae59288f1e7d58d76558a6ee96d533bc5019f] Linux 7.2
  git bisect start '0f23d56f17fdfc7db69d51f64c8b91bbab947aa9' 'v7.2'
  # bad: [1c3e8cef79ea5f1415cff0d3c507e2e07b71ade8] Merge tag 'vfs-7.3-rc1.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
  git bisect bad 1c3e8cef79ea5f1415cff0d3c507e2e07b71ade8
  # bad: [9ea8d6197d9f43a15ccb9c0dce601ec535d5da7e] Merge tag 'vfs-7.3-rc1.iomap' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
  git bisect bad 9ea8d6197d9f43a15ccb9c0dce601ec535d5da7e
  # good: [a7b880449ab1b2389b31ed9da703691dcac54655] binfmt_misc: carry pre-opened interpreters in struct binfmt_misc_interp
  git bisect good a7b880449ab1b2389b31ed9da703691dcac54655
  # good: [7c7fe554f40adac2a7f8d9b6d5886ca332edd496] docs: fix grammatical error in iomap docs
  git bisect good 7c7fe554f40adac2a7f8d9b6d5886ca332edd496
  # good: [d31a688a49a82a48e0434aee9d851e094270a6ee] Merge tags 'vfs-7.3-rc1.efs' and 'vfs-7.3-rc1.freevxfs' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
  git bisect good d31a688a49a82a48e0434aee9d851e094270a6ee
  # bad: [a45a6605cd04f2e55c1650a49bdb05106ac07ccc] Documentation: add failfs documentation
  git bisect bad a45a6605cd04f2e55c1650a49bdb05106ac07ccc
  # good: [20370a5f5d9b1549ab3bf10a898b4e024b8841fa] fs: add fchroot()
  git bisect good 20370a5f5d9b1549ab3bf10a898b4e024b8841fa
  # bad: [79d27fd718545db4731691e0a77e51d27dc1a41e] arch: hookup fchroot() system call
  git bisect bad 79d27fd718545db4731691e0a77e51d27dc1a41e
  # good: [b1221afa31cc2daf6b83d72e45827cffb4e86aff] fs: support FD_FAILFS_ROOT in fchroot()
  git bisect good b1221afa31cc2daf6b83d72e45827cffb4e86aff
  # first 'bad' commit: [79d27fd718545db4731691e0a77e51d27dc1a41e] arch: hookup fchroot() system call

I do see that change in -next and there is no error there so was this a
known issue that was fixed in another tree? I will keep looking.

-- 
Cheers,
Nathan