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extrawarn: enable format and stringop overflow warnings in W=1 

The stringop and format warnings got disabled globally when they were
newly introduced in commit bd664f6b3e ("disable new gcc-7.1.1 warnings
for now"), 217c3e0196 ("disable stringop truncation warnings for now")
and 5a76021c2e ("gcc-10: disable 'stringop-overflow' warning for now").

In all cases, the sentiment at the time was that the warnings are
useful, and we actually addressed a number of real bugs based on
them, but we never managed to eliminate them all because even the
build bots using W=1 builds only see the -Wstringop-truncation
warnings that are enabled at that level.

Move these into the W=1 section to give them a larger build coverage
and actually eliminate them over time.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
This commit is contained in:
Arnd Bergmann 2023-08-11 16:03:23 +02:00 committed by Masahiro Yamada
parent 2cd3271b7a
commit 6d4ab2e97d
1 changed files with 6 additions and 5 deletions
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11
scripts/Makefile.extrawarn
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@ -16,8 +16,6 @@ KBUILD_CFLAGS += -Werror=strict-prototypes
KBUILD_CFLAGS += -Wno-format-security
KBUILD_CFLAGS += -Wno-trigraphs
KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,)
KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation)
KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow)
KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)
ifneq ($(CONFIG_FRAME_WARN),0)
@ -56,9 +54,6 @@ KBUILD_CFLAGS += -Wno-pointer-sign
# globally built with -Wcast-function-type.
KBUILD_CFLAGS += $(call cc-option, -Wcast-function-type)
# We'll want to enable this eventually, but it's not going away for 5.7 at least
KBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow)
# Another good warning that we'll want to enable eventually
KBUILD_CFLAGS += $(call cc-disable-warning, restrict)
@ -111,6 +106,9 @@ KBUILD_CFLAGS += -Wmissing-include-dirs
KBUILD_CFLAGS += $(call cc-option, -Wunused-but-set-variable)
KBUILD_CFLAGS += $(call cc-option, -Wunused-const-variable)
KBUILD_CFLAGS += $(call cc-option, -Wpacked-not-aligned)
KBUILD_CFLAGS += $(call cc-option, -Wformat-overflow)
KBUILD_CFLAGS += $(call cc-option, -Wformat-truncation)
KBUILD_CFLAGS += $(call cc-option, -Wstringop-overflow)
KBUILD_CFLAGS += $(call cc-option, -Wstringop-truncation)
KBUILD_CPPFLAGS += -Wundef
@ -123,6 +121,9 @@ else
KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
KBUILD_CFLAGS += $(call cc-disable-warning, packed-not-aligned)
KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow)
KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation)
KBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow)
KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
ifdef CONFIG_CC_IS_CLANG