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| author | Masahiro Yamada <masahiroy@kernel.org> | 2020-09-10 22:51:17 +0900 |
|---|---|---|
| committer | Masahiro Yamada <masahiroy@kernel.org> | 2020-09-25 00:36:50 +0900 |
| commit | 8b42cf2fde0ee8b63d71d4bc442a03b6ea55b00b (patch) | |
| tree | cda167eec82055a63302c971b5c9274682bd340e | |
| parent | bb2732112bc52bed7b20b9fc59d7246e4e7ce5ed (diff) | |
| download | linux-8b42cf2fde0ee8b63d71d4bc442a03b6ea55b00b.tar.gz linux-8b42cf2fde0ee8b63d71d4bc442a03b6ea55b00b.tar.bz2 linux-8b42cf2fde0ee8b63d71d4bc442a03b6ea55b00b.zip | |
kbuild: remove cc-option test of -fno-strict-overflow
The minimal compiler versions, GCC 4.9 and Clang 10 support this flag.
Here is the godbolt:
https://godbolt.org/z/odq8h9
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Acked-by: Will Deacon <will@kernel.org>
| -rw-r--r-- | Makefile | 2 | ||||
| -rw-r--r-- | arch/arm64/kernel/vdso32/Makefile | 2 |
2 files changed, 2 insertions, 2 deletions
@@ -928,7 +928,7 @@ KBUILD_CFLAGS += $(call cc-disable-warning, restrict) KBUILD_CFLAGS += $(call cc-disable-warning, maybe-uninitialized) # disable invalid "can't wrap" optimizations for signed / pointers -KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) +KBUILD_CFLAGS += -fno-strict-overflow # clang sets -fmerge-all-constants by default as optimization, but this # is non-conforming behavior for C and in fact breaks the kernel, so we diff --git a/arch/arm64/kernel/vdso32/Makefile b/arch/arm64/kernel/vdso32/Makefile index 572475b7b7ed..3d99a9a249e3 100644 --- a/arch/arm64/kernel/vdso32/Makefile +++ b/arch/arm64/kernel/vdso32/Makefile @@ -90,7 +90,7 @@ VDSO_CFLAGS += -O2 # Some useful compiler-dependent flags from top-level Makefile VDSO_CFLAGS += $(call cc32-option,-Wdeclaration-after-statement,) VDSO_CFLAGS += $(call cc32-option,-Wno-pointer-sign) -VDSO_CFLAGS += $(call cc32-option,-fno-strict-overflow) +VDSO_CFLAGS += -fno-strict-overflow VDSO_CFLAGS += $(call cc32-option,-Werror=strict-prototypes) VDSO_CFLAGS += $(call cc32-option,-Werror=date-time) VDSO_CFLAGS += $(call cc32-option,-Werror=incompatible-pointer-types) |