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authorMasahiro Yamada <masahiroy@kernel.org>2020-06-26 21:59:12 +0300
committerMasahiro Yamada <masahiroy@kernel.org>2020-07-07 05:13:10 +0300
commit893ab00439a45513cae55781fc8e3b7108ee1cda (patch)
treefb8fd6db0c947cd8040bf06e520ecc6329e56cba /Documentation/kbuild/kconfig-language.rst
parentdd7699e37f289fa433f42c6bcc108468c8b198c0 (diff)
downloadlinux-893ab00439a45513cae55781fc8e3b7108ee1cda.tar.xz
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 'Documentation/kbuild/kconfig-language.rst')
-rw-r--r--Documentation/kbuild/kconfig-language.rst4
1 files changed, 2 insertions, 2 deletions
diff --git a/Documentation/kbuild/kconfig-language.rst b/Documentation/kbuild/kconfig-language.rst
index a1601ec3317b..2538e7cb08e6 100644
--- a/Documentation/kbuild/kconfig-language.rst
+++ b/Documentation/kbuild/kconfig-language.rst
@@ -540,8 +540,8 @@ followed by a test macro::
If you need to expose a compiler capability to makefiles and/or C source files,
`CC_HAS_` is the recommended prefix for the config option::
- config CC_HAS_STACKPROTECTOR_NONE
- def_bool $(cc-option,-fno-stack-protector)
+ config CC_HAS_ASM_GOTO
+ def_bool $(success,$(srctree)/scripts/gcc-goto.sh $(CC))
Build as module only
~~~~~~~~~~~~~~~~~~~~