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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 /Makefile
parentdd7699e37f289fa433f42c6bcc108468c8b198c0 (diff)
downloadlwn-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 'Makefile')
-rw-r--r--Makefile2
1 files changed, 1 insertions, 1 deletions
diff --git a/Makefile b/Makefile
index fe0164a654c7..ea283c9bbaa8 100644
--- a/Makefile
+++ b/Makefile
@@ -762,7 +762,7 @@ ifneq ($(CONFIG_FRAME_WARN),0)
KBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN)
endif
-stackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector
+stackp-flags-y := -fno-stack-protector
stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector
stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong