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References: <20220810114318.3220630-1-anders.roxell@linaro.org> <87fsi3ce28.fsf@mpe.ellerman.id.au>
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From:   Anders Roxell <anders.roxell@linaro.org>
Date:   Thu, 11 Aug 2022 14:35:08 +0200
Message-ID: <CADYN=9L_Sgd8HTkhtM5t0eoN7ict8zX6fRCJsVvYcgp9H_QsSg@mail.gmail.com>
Subject: Re: [PATCHv3, resend] powerpc: mm: radix_tlb: rearrange the if-else block
To:     Michael Ellerman <mpe@ellerman.id.au>
Cc:     nathan@kernel.org, ndesaulniers@google.com, llvm@lists.linux.dev,
        linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
        Arnd Bergmann <arnd@arndb.de>,
        Christophe Leroy <christophe.leroy@csgroup.eu>
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On Thu, 11 Aug 2022 at 11:41, Michael Ellerman <mpe@ellerman.id.au> wrote:
>
> Anders Roxell <anders.roxell@linaro.org> writes:
> > Clang warns:
> >
> > arch/powerpc/mm/book3s64/radix_tlb.c:1191:23: error: variable 'hstart' is uninitialized when used here [-Werror,-Wuninitialized]
> >                                 __tlbiel_va_range(hstart, hend, pid,
> >                                                   ^~~~~~
> > arch/powerpc/mm/book3s64/radix_tlb.c:1175:23: note: initialize the variable 'hstart' to silence this warning
> >                 unsigned long hstart, hend;
> >                                     ^
> >                                      = 0
> > arch/powerpc/mm/book3s64/radix_tlb.c:1191:31: error: variable 'hend' is uninitialized when used here [-Werror,-Wuninitialized]
> >                                 __tlbiel_va_range(hstart, hend, pid,
> >                                                           ^~~~
> > arch/powerpc/mm/book3s64/radix_tlb.c:1175:29: note: initialize the variable 'hend' to silence this warning
> >                 unsigned long hstart, hend;
> >                                           ^
> >                                            = 0
> > 2 errors generated.
>
> Which version & config are you building?

clang-13, clang-14 and clang-nightly, configs are cell_defconfig and
maple_defconfig

I'm building with tuxmake [1] like this:
$ tuxmake --runtime podman --target-arch powerpc --toolchain clang-14
--kconfig cell_defconfig

Cheers,
Anders
[1] https://tuxmake.org/