Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Date:   Wed, 7 Apr 2021 21:03:28 +0200
From:   Borislav Petkov <bp@alien8.de>
To:     Nick Desaulniers <ndesaulniers@google.com>
Cc:     Yang Li <yang.lee@linux.alibaba.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>,
        "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" <x86@kernel.org>,
        "H. Peter Anvin" <hpa@zytor.com>,
        Nathan Chancellor <nathan@kernel.org>,
        LKML <linux-kernel@vger.kernel.org>,
        clang-built-linux <clang-built-linux@googlegroups.com>,
        Masahiro Yamada <masahiroy@kernel.org>
Subject: Re: [PATCH] x86/kernel: remove unneeded dead-store initialization
Message-ID: <20210407190328.GM25319@zn.tnic>
References: <1617177624-24670-1-git-send-email-yang.lee@linux.alibaba.com>
 <20210407120239.GD25319@zn.tnic>
 <CAKwvOdnuKazNhqXAM9Qj7DgCW=PqVHkyyfYWytmkyBzv0QeYsw@mail.gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
In-Reply-To: <CAKwvOdnuKazNhqXAM9Qj7DgCW=PqVHkyyfYWytmkyBzv0QeYsw@mail.gmail.com>
Precedence: bulk

On Wed, Apr 07, 2021 at 10:41:26AM -0700, Nick Desaulniers wrote:
> You do have clang-tidy installed right? `which clang-tidy`?

Yah, installed that and was able to repro:

arch/x86/kernel/cpu/cacheinfo.c:880:24: warning: Value stored to 'this_cpu_ci' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
        struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
arch/x86/kernel/cpu/cacheinfo.c:880:24: note: Value stored to 'this_cpu_ci' during its initialization is never read

Thx.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette