| Message ID | 20220930203310.4010564-1-samitolvanen@google.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Makefile.extrawarn: Move -Wcast-function-type-strict to W=1 | expand |
On Fri, 30 Sep 2022 20:33:10 +0000, Sami Tolvanen wrote: > We enable -Wcast-function-type globally in the kernel to warn about > mismatching types in function pointer casts. Compilers currently > warn only about ABI incompability with this flag, but Clang 16 will > enable a stricter version of the check by default that checks for an > exact type match. This will be very noisy in the kernel, so disable > -Wcast-function-type-strict without W=1 until the new warnings have > been addressed. > > [...] Applied to for-next/hardening, thanks! [1/1] Makefile.extrawarn: Move -Wcast-function-type-strict to W=1 https://git.kernel.org/kees/c/2120635108b3
diff --git a/scripts/Makefile.extrawarn b/scripts/Makefile.extrawarn index 6ae482158bc4..52bd7df84fd6 100644 --- a/scripts/Makefile.extrawarn +++ b/scripts/Makefile.extrawarn @@ -64,6 +64,7 @@ KBUILD_CFLAGS += -Wno-sign-compare KBUILD_CFLAGS += $(call cc-disable-warning, pointer-to-enum-cast) KBUILD_CFLAGS += -Wno-tautological-constant-out-of-range-compare KBUILD_CFLAGS += $(call cc-disable-warning, unaligned-access) +KBUILD_CFLAGS += $(call cc-disable-warning, cast-function-type-strict) endif endif
We enable -Wcast-function-type globally in the kernel to warn about mismatching types in function pointer casts. Compilers currently warn only about ABI incompability with this flag, but Clang 16 will enable a stricter version of the check by default that checks for an exact type match. This will be very noisy in the kernel, so disable -Wcast-function-type-strict without W=1 until the new warnings have been addressed. Cc: stable@vger.kernel.org Link: https://reviews.llvm.org/D134831 Link: https://github.com/ClangBuiltLinux/linux/issues/1724 Suggested-by: Nathan Chancellor <nathan@kernel.org> Signed-off-by: Sami Tolvanen <samitolvanen@google.com> --- scripts/Makefile.extrawarn | 1 + 1 file changed, 1 insertion(+) base-commit: 7bc6e90d7aa4170039abe80b9f4e8c8e4eb35091