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From: Michael Ellerman <mpe@ellerman.id.au>
To: Anders Roxell <anders.roxell@linaro.org>, nathan@kernel.org,
 ndesaulniers@google.com
Cc: llvm@lists.linux.dev, linuxppc-dev@lists.ozlabs.org,
 linux-kernel@vger.kernel.org, Anders Roxell <anders.roxell@linaro.org>,
 Arnd Bergmann <arnd@arndb.de>, Christophe Leroy
 <christophe.leroy@csgroup.eu>
Subject: Re: [PATCHv3, resend] powerpc: mm: radix_tlb: rearrange the if-else
 block
In-Reply-To: <20220810114318.3220630-1-anders.roxell@linaro.org>
References: <20220810114318.3220630-1-anders.roxell@linaro.org>
Date: Thu, 11 Aug 2022 19:41:35 +1000
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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?

I don't see this warning in my test builds.

cheers