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kbuild: remove cc-option switch from -Wframe-larger-than=

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This CONFIG option was added by commit 35bb5b1e0e ("Add option to
enable -Wframe-larger-than= on gcc 4.4"). At that time, the cc-option
check was needed.

According to Documentation/process/changes.rst, the current minimal
supported version of GCC is 4.6, so you can assume GCC supports it.
Clang supports it as well.

Remove the cc-option switch and redundant comments.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
This commit is contained in:
Masahiro Yamada 2020-02-17 00:19:36 +09:00
parent f84fdf8df1
commit a83e4ca26a
2 changed files with 2 additions and 3 deletions
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2
Makefile
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@ -729,7 +729,7 @@ KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
endif
ifneq ($(CONFIG_FRAME_WARN),0)
KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
KBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN)
endif
stackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector

3
lib/Kconfig.debug
View File

@ -266,7 +266,7 @@ config ENABLE_MUST_CHECK
attribute warn_unused_result" messages.
config FRAME_WARN
int "Warn for stack frames larger than (needs gcc 4.4)"
int "Warn for stack frames larger than"
range 0 8192
default 2048 if GCC_PLUGIN_LATENT_ENTROPY
default 1280 if (!64BIT && PARISC)
@ -276,7 +276,6 @@ config FRAME_WARN
Tell gcc to warn at build time for stack frames larger than this.
Setting this too low will cause a lot of warnings.
Setting it to 0 disables the warning.
Requires gcc 4.4
config STRIP_ASM_SYMS
bool "Strip assembler-generated symbols during link"