[PATCH 5.4 v3 0/6] Fix Build ID on arm64 if CONFIG_MODVERSIONS=y

From: Tom Saeger <tom.saeger@oracle.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Sasha Levin <sashal@kernel.org>,
	Tom Saeger <tom.saeger@oracle.com>,
	stable@vger.kernel.org, "H.J. Lu" <hjl.tools@gmail.com>,
	Kees Cook <keescook@chromium.org>,
	Masahiro Yamada <masahiroy@kernel.org>,
	Dennis Gilmore <dennis@ausil.us>,
	Ard Biesheuvel <ardb@kernel.org>,
	Palmer Dabbelt <palmer@rivosinc.com>,
	Michael Ellerman <mpe@ellerman.id.au>,
	Nathan Chancellor <nathan@kernel.org>,
	Heiko Carstens <hca@linux.ibm.com>,
	John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>,
	Arnd Bergmann <arnd@arndb.de>, Christoph Hellwig <hch@lst.de>,
	Naresh Kamboju <naresh.kamboju@linaro.org>,
	Rich Felker <dalias@libc.org>,
	Yoshinori Sato <ysato@users.sourceforge.jp>,
	Andrew Morton <akpm@linux-foundation.org>
Subject: [PATCH 5.4 v3 0/6] Fix Build ID on arm64 if CONFIG_MODVERSIONS=y
Date: Wed,  1 Mar 2023 19:06:58 -0700	[thread overview]
Message-ID: <20230210-tsaeger-upstream-linux-stable-5-4-v3-0-122fc5440d4c@oracle.com> (raw)

Build ID is missing for arm64 with CONFIG_MODVERSIONS=y using ld >= 2.36
on 5.4, 5.10, and 5.15

Backport Build ID fixes, which work-around ld behavior by
modifying vmlinux linker script.

This has been build tested this on {x86_64, arm64, riscv, powerpc, s390, sh}.

Simple test case:
  $ readelf -n vmlinux | grep "Build ID"

Changes for v3:
- per Greg, re-style backport of 84d5f77fc2ee ("x86, vmlinux.lds: Add RUNTIME_DISCARD_EXIT to generic DISCARDS")
- per Greg, add justification for backporting:
  99cb0d917ffa ("arch: fix broken BuildID for arm64 and riscv")
  which has "Fixes:" to v6.2 only content.
- rebase to 5.4.233

Changes for v2:
- rebase 6/6 c1c551bebf92 ("sh: define RUNTIME_DISCARD_EXIT") from upstream

Previous threads:
[1] v2 https://lore.kernel.org/all/20230210-tsaeger-upstream-linux-stable-5-4-v2-0-a56d1e0f5e98@oracle.com/
[2] v1 https://lore.kernel.org/all/cover.1674588616.git.tom.saeger@oracle.com/
[3] https://lore.kernel.org/all/3df32572ec7016e783d37e185f88495831671f5d.1671143628.git.tom.saeger@oracle.com/
[4] https://lore.kernel.org/all/cover.1670358255.git.tom.saeger@oracle.com/

Signed-off-by: Tom Saeger <tom.saeger@oracle.com>
---
H.J. Lu (1):
      x86, vmlinux.lds: Add RUNTIME_DISCARD_EXIT to generic DISCARDS

Masahiro Yamada (2):
      arch: fix broken BuildID for arm64 and riscv
      s390: define RUNTIME_DISCARD_EXIT to fix link error with GNU ld < 2.36

Michael Ellerman (2):
      powerpc/vmlinux.lds: Define RUNTIME_DISCARD_EXIT
      powerpc/vmlinux.lds: Don't discard .rela* for relocatable builds

Tom Saeger (1):
      sh: define RUNTIME_DISCARD_EXIT

 arch/powerpc/kernel/vmlinux.lds.S |  6 +++++-
 arch/s390/kernel/vmlinux.lds.S    |  2 ++
 arch/sh/kernel/vmlinux.lds.S      |  1 +
 arch/x86/kernel/vmlinux.lds.S     |  2 ++
 include/asm-generic/vmlinux.lds.h | 16 ++++++++++++++--
 5 files changed, 24 insertions(+), 3 deletions(-)
---
base-commit: 69f65d442efe5eb3c1ee8adec251b918c1b0090a
change-id: 20230210-tsaeger-upstream-linux-stable-5-4-07f93e88c218

Best regards,
-- 
Tom Saeger <tom.saeger@oracle.com>