Perhaps the two of you need to compare confugurations?
Whatever for? I know the robots report this warning because there was
one from the KVM cross-merge when the .fixup removal went in. It got
reported and fixed and that was the last of it.
Anyway; try:
$ git grep "\.fixup" arch/x86/
there isn't a single usage.
Andrew Cooper suggested upgrading the orphan section warning to a hard
link error, orphan sections are bad regardless.