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| author | Masahiro Yamada <masahiroy@kernel.org> | 2020-06-27 03:59:12 +0900 |
|---|---|---|
| committer | Masahiro Yamada <masahiroy@kernel.org> | 2020-07-07 11:13:10 +0900 |
| commit | 893ab00439a45513cae55781fc8e3b7108ee1cda (patch) | |
| tree | fb8fd6db0c947cd8040bf06e520ecc6329e56cba /arch/mips/vdso | |
| parent | dd7699e37f289fa433f42c6bcc108468c8b198c0 (diff) | |
| download | lwn-893ab00439a45513cae55781fc8e3b7108ee1cda.tar.gz lwn-893ab00439a45513cae55781fc8e3b7108ee1cda.zip | |
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/mips/vdso')
| -rw-r--r-- | arch/mips/vdso/Makefile | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/mips/vdso/Makefile b/arch/mips/vdso/Makefile index 2e64c7600eea..57fe83235281 100644 --- a/arch/mips/vdso/Makefile +++ b/arch/mips/vdso/Makefile @@ -35,8 +35,7 @@ cflags-vdso := $(ccflags-vdso) \ -O3 -g -fPIC -fno-strict-aliasing -fno-common -fno-builtin -G 0 \ -mrelax-pic-calls $(call cc-option, -mexplicit-relocs) \ -fno-stack-protector -fno-jump-tables -DDISABLE_BRANCH_PROFILING \ - $(call cc-option, -fno-asynchronous-unwind-tables) \ - $(call cc-option, -fno-stack-protector) + $(call cc-option, -fno-asynchronous-unwind-tables) aflags-vdso := $(ccflags-vdso) \ -D__ASSEMBLY__ -Wa,-gdwarf-2 |