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Date:   Mon, 26 Oct 2020 11:48:11 +0100
From:   Michal Kubecek <mkubecek@suse.cz>
To:     linux-s390@vger.kernel.org, Joe Perches <joe@perches.com>
Cc:     linux-kernel@vger.kernel.org, Jiri Slaby <jslaby@suse.cz>
Subject: [Regression] s390x build broken with 5.10-rc1 (bisected)
Message-ID: <20201026104811.22ta4pby2chmz4pv@lion.mk-sys.cz>
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Hello,

5.10-rc1 builds on s390x fail with

  make -f ./scripts/Makefile.build obj=arch/s390/boot arch/s390/boot/bzImage
  make -f ./scripts/Makefile.modpost
  make -f ./scripts/Makefile.modfinal
  make -f ./scripts/Makefile.build obj=arch/s390/boot/compressed arch/s390/boot/compressed/vmlinux
          s1=`s390x-suse-linux-objdump -t -j ".boot.data" "vmlinux" | sort | sed -n "/0000000000000000/! s/.*\s.boot.data\s\+//p" | sha256sum`; s2=`s390x-suse-linux-objdump -t -j ".boot.data" "arch/s390/boot/compressed/vmlinux" | sort | sed -n "/0000000000000000/! s/.*\s.boot.data\s\+//p" | sha256sum`; if [ "$s1" != "$s2" ]; then echo "error: section .boot.data differs between vmlinux and arch/s390/boot/compressed/vmlinux" >&2; exit 1; fi; touch arch/s390/boot/section_cmp.boot.data
          s1=`s390x-suse-linux-objdump -t -j ".boot.preserved.data" "vmlinux" | sort | sed -n "/0000000000000000/! s/.*\s.boot.preserved.data\s\+//p" | sha256sum`; s2=`s390x-suse-linux-objdump -t -j ".boot.preserved.data" "arch/s390/boot/compressed/vmlinux" | sort | sed -n "/0000000000000000/! s/.*\s.boot.preserved.data\s\+//p" | sha256sum`; if [ "$s1" != "$s2" ]; then echo "error: section .boot.preserved.data differs between vmlinux and arch/s390/boot/compressed/vmlinux" >&2; exit 1; fi; touch arch/s390/boot/section_cmp.boot.preserved.data
  error: section .boot.data differs between vmlinux and arch/s390/boot/compressed/vmlinux
  make[1]: *** [arch/s390/boot/Makefile:65: arch/s390/boot/section_cmp.boot.data] Error 1
  make[1]: *** Waiting for unfinished jobs....
  error: section .boot.preserved.data differs between vmlinux and arch/s390/boot/compressed/vmlinux
  make[1]: *** [arch/s390/boot/Makefile:65: arch/s390/boot/section_cmp.boot.preserved.data] Error 1
  make: *** [arch/s390/Makefile:153: bzImage] Error 2
  make: *** Waiting for unfinished jobs....

Bisect identified commit 33def8498fdd ("treewide: Convert macro and uses
of __section(foo) to __section("foo")"), i.e. the very last commit
before tagging v5.10-rc1.

I can reproduce this with e.g. defconfig and both native s390x build and
build on x86_64 using cross compiler. I used gcc 10.2.1 and binutils 2.34.

Michal