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authorMasahiro Yamada <masahiroy@kernel.org>2020-06-27 03:59:12 +0900
committerMasahiro Yamada <masahiroy@kernel.org>2020-07-07 11:13:10 +0900
commit893ab00439a45513cae55781fc8e3b7108ee1cda (patch)
treefb8fd6db0c947cd8040bf06e520ecc6329e56cba /arch/Kconfig
parentdd7699e37f289fa433f42c6bcc108468c8b198c0 (diff)
downloadlinux-893ab00439a45513cae55781fc8e3b7108ee1cda.tar.bz2
kbuild: remove cc-option test of -fno-stack-protector
Some Makefiles already pass -fno-stack-protector unconditionally. For example, arch/arm64/kernel/vdso/Makefile, arch/x86/xen/Makefile. No problem report so far about hard-coding this option. So, we can assume all supported compilers know -fno-stack-protector. GCC 4.8 and Clang support this option (https://godbolt.org/z/_HDGzN) Get rid of cc-option from -fno-stack-protector. Remove CONFIG_CC_HAS_STACKPROTECTOR_NONE, which is always 'y'. Note: arch/mips/vdso/Makefile adds -fno-stack-protector twice, first unconditionally, and second conditionally. I removed the second one. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Reviewed-by: Kees Cook <keescook@chromium.org> Acked-by: Ard Biesheuvel <ardb@kernel.org> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Diffstat (limited to 'arch/Kconfig')
-rw-r--r--arch/Kconfig3
1 files changed, 0 insertions, 3 deletions
diff --git a/arch/Kconfig b/arch/Kconfig
index 8cc35dc556c7..1ea61290900a 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -478,9 +478,6 @@ config HAVE_STACKPROTECTOR
An arch should select this symbol if:
- it has implemented a stack canary (e.g. __stack_chk_guard)
-config CC_HAS_STACKPROTECTOR_NONE
- def_bool $(cc-option,-fno-stack-protector)
-
config STACKPROTECTOR
bool "Stack Protector buffer overflow detection"
depends on HAVE_STACKPROTECTOR