Messages in this thread | | | From | Nick Desaulniers <> | Date | Fri, 30 Apr 2021 15:49:00 -0700 | Subject | Re: [PATCH] Makefile: Move -Wno-unused-but-set-variable out of GCC only block |
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On Wed, Apr 28, 2021 at 6:24 PM Nathan Chancellor <nathan@kernel.org> wrote: > > Currently, -Wunused-but-set-variable is only supported by GCC so it is > disabled unconditionally in a GCC only block (it is enabled with W=1). > clang currently has its implementation for this warning in review so > preemptively move this statement out of the GCC only block and wrap it > with cc-disable-warning so that both compilers function the same. > > Cc: stable@vger.kernel.org > Link: https://reviews.llvm.org/D100581
Thanks for the patch.
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Tested-by: Nick Desaulniers <ndesaulniers@google.com>
(That's actually one of Jian's teammates working on implementing that warning). Tested with https://reviews.llvm.org/D100581 applied, which I do fully expect to land in LLVM soon.
> Signed-off-by: Nathan Chancellor <nathan@kernel.org> > --- > Makefile | 8 ++++---- > 1 file changed, 4 insertions(+), 4 deletions(-) > > diff --git a/Makefile b/Makefile > index f03888cdba4e..911d839cfea8 100644 > --- a/Makefile > +++ b/Makefile > @@ -775,16 +775,16 @@ KBUILD_CFLAGS += -Wno-gnu > KBUILD_CFLAGS += -mno-global-merge > else > > -# These warnings generated too much noise in a regular build. > -# Use make W=1 to enable them (see scripts/Makefile.extrawarn) > -KBUILD_CFLAGS += -Wno-unused-but-set-variable > - > # Warn about unmarked fall-throughs in switch statement. > # Disabled for clang while comment to attribute conversion happens and > # https://github.com/ClangBuiltLinux/linux/issues/636 is discussed. > KBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough,) > endif > > +# These warnings generated too much noise in a regular build. > +# Use make W=1 to enable them (see scripts/Makefile.extrawarn) > +KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable) > + > KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) > ifdef CONFIG_FRAME_POINTER > KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls > > base-commit: d8201efe75e13146ebde433745c7920e15593baf > -- > 2.31.1.362.g311531c9de > > --
-- Thanks, ~Nick Desaulniers
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