Ok, here's a v2 which goes ontop of http://lkml.kernel.org/r/1404175346-12330-1-git-send-email-behanw@xxxxxxxxxxxxxxxxxx After this, all warnings stuff should be back to normal. --- From: Borislav Petkov <bp@xxxxxxx> Subject: [PATCH -v2] Kbuild: Move -Wmaybe-uninitialized to W=1 This warning is enabled by -Wall or -Wextra, says the gcc manpage. It also says that gcc cannot always know whether the warning is issued correctly: "These warnings are made optional because GCC is not smart enough to see all the reasons why the code might be correct in spite of appearing to have an error." And, as expected, it fires for perfectly valid use cases, thus making it not really useful. Let's move it to the W=1 bunch in case people want to enable it with the additional checks. Signed-off-by: Borislav Petkov <bp@xxxxxxx> --- Makefile | 5 ++++- scripts/Makefile | 1 + scripts/Makefile.extrawarn | 1 + 3 files changed, 6 insertions(+), 1 deletion(-) diff --git a/Makefile b/Makefile index 4d75b4bceedd..b58c94261960 100644 --- a/Makefile +++ b/Makefile @@ -613,7 +613,7 @@ include $(srctree)/arch/$(SRCARCH)/Makefile KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE -KBUILD_CFLAGS += -Os $(call cc-disable-warning,maybe-uninitialized,) +KBUILD_CFLAGS += -Os else KBUILD_CFLAGS += -O2 endif @@ -742,6 +742,9 @@ KBUILD_CFLAGS += $(call cc-option,-Werror=date-time) # use the deterministic mode of AR if available KBUILD_ARFLAGS := $(call ar-option,D) +# disable -Wmaybe-uninitialized as too noisy, see Makefile.extrawarn instead +KBUILD_CFLAGS += $(call cc-disable-warning, maybe-uninitialized) + # check for 'asm goto' ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y) KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO diff --git a/scripts/Makefile b/scripts/Makefile index 890df5c6adfb..a483d9988a2e 100644 --- a/scripts/Makefile +++ b/scripts/Makefile @@ -19,6 +19,7 @@ hostprogs-$(CONFIG_BUILDTIME_EXTABLE_SORT) += sortextable hostprogs-$(CONFIG_ASN1) += asn1_compiler HOSTCFLAGS_sortextable.o = -I$(srctree)/tools/include +HOSTCFLAGS_sortextable.o += $(call cc-disable-warning, maybe-uninitialized) HOSTCFLAGS_asn1_compiler.o = -I$(srctree)/include always := $(hostprogs-y) $(hostprogs-m) diff --git a/scripts/Makefile.extrawarn b/scripts/Makefile.extrawarn index e3501272cd93..9657d5778e06 100644 --- a/scripts/Makefile.extrawarn +++ b/scripts/Makefile.extrawarn @@ -25,6 +25,7 @@ warning-1 += -Wold-style-definition warning-1 += $(call cc-option, -Wmissing-include-dirs) warning-1 += $(call cc-option, -Wunused-but-set-variable) warning-1 += $(call cc-disable-warning, missing-field-initializers) +warning-1 += $(call cc-option, -Wmaybe-uninitialized) ifeq ($(COMPILER),clang) warning-1 += $(call cc-disable-warning, initializer-overrides) -- 2.0.0 -- Regards/Gruss, Boris. Sent from a fat crate under my desk. Formatting is fine. -- -- To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
