linux-kernel - Re: [PATCH] powerpc: Avoid clang uninitialized warning in __get_user_size

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Message-Id: <161970488758.4033873.8885072573106528353.b4-ty@ellerman.id.au>
Date:   Fri, 30 Apr 2021 00:01:27 +1000
From:   Michael Ellerman <patch-notifications@...erman.id.au>
To:     Michael Ellerman <mpe@...erman.id.au>,
        Nathan Chancellor <nathan@...nel.org>
Cc:     clang-built-linux@...glegroups.com, linuxppc-dev@...ts.ozlabs.org,
        linux-kernel@...r.kernel.org,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Paul Mackerras <paulus@...ba.org>
Subject: Re: [PATCH] powerpc: Avoid clang uninitialized warning in __get_user_size_allowed

On Mon, 26 Apr 2021 13:35:18 -0700, Nathan Chancellor wrote:
> Commit 9975f852ce1b ("powerpc/uaccess: Remove calls to __get_user_bad()
> and __put_user_bad()") switch to BUILD_BUG() in the default case, which
> leaves x uninitialized. This will not be an issue because the build will
> be broken in that case but clang does static analysis before it realizes
> the default case will be done so it warns about x being uninitialized
> (trimmed for brevity):
> 
> [...]

Applied to powerpc/next.

[1/1] powerpc: Avoid clang uninitialized warning in __get_user_size_allowed
      https://git.kernel.org/powerpc/c/f9cd5f91a897ea0c45d0059ceeb091cee78c6ebe

cheers