[PATCH] kbuild: move -fzero-init-padding-bits=all to the top-level Makefile

From: Masahiro Yamada
Date: Sat Feb 15 2025 - 11:16:18 EST


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@xxxxxxxxxx>
---

Makefile | 3 +++
scripts/Makefile.extrawarn | 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)
diff --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