linux-kernel - [PATCH v2 0/1] kbuild: upgrade the orphan section warning to an error if CONFIG

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Message-Id: <20221025073023.16137-1-xin3.li@intel.com>
Date:   Tue, 25 Oct 2022 00:30:22 -0700
From:   Xin Li <xin3.li@...el.com>
To:     linux-kernel@...r.kernel.org, llvm@...ts.linux.dev,
        linux-kbuild@...r.kernel.org, x86@...nel.org
Cc:     nathan@...nel.org, keescook@...omium.org,
        andrew.cooper3@...rix.com, hpa@...or.com, peterz@...radead.org
Subject: [PATCH v2 0/1] kbuild: upgrade the orphan section warning to an error if CONFIG_WERROR is set

Andrew Cooper suggested upgrading the orphan section warning to a hard link
error. However Nathan Chancellor said outright turning the warning into an
error with no escape hatch might be too aggressive, as we have had these
warnings triggered by new compiler generated sections, and suggested turning
orphan sections into an error only if CONFIG_WERROR is set. Kees Cook echoed
and emphasized that the mandate from Linus is that we should avoid breaking
builds. It wrecks bisection, it causes problems across compiler versions, etc.

Change since v1:
* Introduce a new Kconfig item CONFIG_LD_ORPHAN_WARN_LEVEL to replace
  (if $(CONFIG_WERROR),error,warn) (Nathan Chancellor).

Xin Li (1):
  kbuild: upgrade the orphan section warning to an error if
    CONFIG_WERROR is set

 Makefile                          |  2 +-
 arch/arm/boot/compressed/Makefile |  2 +-
 arch/arm64/kernel/vdso/Makefile   |  2 +-
 arch/arm64/kernel/vdso32/Makefile |  2 +-
 arch/x86/boot/compressed/Makefile |  2 +-
 init/Kconfig                      | 15 ++++++++++++---
 6 files changed, 17 insertions(+), 8 deletions(-)

-- 
2.34.1