From: Masahiro Yamada <masahiroy@kernel.org>
To: linux-kbuild@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, Kees Cook <kees@kernel.org>,
Masahiro Yamada <masahiroy@kernel.org>,
Nathan Chancellor <nathan@kernel.org>,
Nicolas Schier <nicolas@fjasle.eu>
Subject: [PATCH] kbuild: move -fzero-init-padding-bits=all to the top-level Makefile
Date: Sun, 16 Feb 2025 01:15:52 +0900 [thread overview]
Message-ID: <20250215161604.690467-1-masahiroy@kernel.org> (raw)
The -fzero-init-padding-bits=all option is not a warning flag, so
defining it in scripts/Makefile.extrawarn is inconsistent.
Move it to the top-level Makefile for consistency.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
Makefile | 3 +++
| 3 ---
2 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/Makefile b/Makefile
index 89628e354ca7..4a36864dd4bd 100644
--- a/Makefile
+++ b/Makefile
@@ -928,6 +928,9 @@ KBUILD_CFLAGS += $(CC_AUTO_VAR_INIT_ZERO_ENABLER)
endif
endif
+# Explicitly clear padding bits during variable initialization
+KBUILD_CFLAGS += $(call cc-option,-fzero-init-padding-bits=all)
+
# While VLAs have been removed, GCC produces unreachable stack probes
# for the randomize_kstack_offset feature. Disable it for all compilers.
KBUILD_CFLAGS += $(call cc-option, -fno-stack-clash-protection)
--git a/scripts/Makefile.extrawarn b/scripts/Makefile.extrawarn
index dc081cf46d21..d75897559d18 100644
--- a/scripts/Makefile.extrawarn
+++ b/scripts/Makefile.extrawarn
@@ -82,9 +82,6 @@ KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init)
# Warn if there is an enum types mismatch
KBUILD_CFLAGS += $(call cc-option,-Wenum-conversion)
-# Explicitly clear padding bits during variable initialization
-KBUILD_CFLAGS += $(call cc-option,-fzero-init-padding-bits=all)
-
KBUILD_CFLAGS += -Wextra
KBUILD_CFLAGS += -Wunused
--
2.43.0
next reply other threads:[~2025-02-15 16:16 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-15 16:15 Masahiro Yamada [this message]
2025-02-15 20:37 ` [PATCH] kbuild: move -fzero-init-padding-bits=all to the top-level Makefile Nathan Chancellor
2025-02-16 23:43 ` Kees Cook
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