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a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=z+hK2vHxJimvuS81efjInRFCiVYH3H9sgxFrDD0JWWk=; b=IerDwUN7vAgQD8A+cbls941+nsl5Z4jBzvO4NYbv8FNP9T5iLWq1rgTeDX1ENOPZA1 X1MlnLmNrg1tvLybA0nt7F762DMMmIggSKPzKajrkuDXh8I8hhkx2bVbRwewoDCXiCJW 9RXiP08+9MZkQFUDx/DWr4PjOOMCCXDtUdgI8VdqZ2fgQBJj+uUdC/XfEqociSbv0mYE cCRYdJew7Hb6+LXzuI9HnvjNZ58gdCrqlK0FwPoSFE4QhXBNB7Tb81+U6zFILXA/rEFr XTC334VRs19yX/0OoSVfQJlHWD7X+wYeoQdj1m3OIB3OFwRny1OenoW0pJQRTTQ6EASG b1Dw== X-Gm-Message-State: AOAM5304nakueGe0n3dg8RJ6tQM5C3IYyFtY3LT5SUpCMQ3Y617emegd tmnq9fLEPVzsTcWnbL0tdyC4hFBMF28a6nFv6lkIaA== X-Google-Smtp-Source: ABdhPJzLk1SNj1n3SK6HBgdgAoTXiE+yyJUyl3dRSY5JSIqSCwC8qbwa0j0xt0TKR46UEgTn2ZygUFhs9fsDpoLLag0= X-Received: by 2002:a63:f84f:: with SMTP id v15mr28103028pgj.204.1634633761566; Tue, 19 Oct 2021 01:56:01 -0700 (PDT) MIME-Version: 1.0 References: <202110172146.wMBY6qzo-lkp@intel.com> In-Reply-To: From: Tzung-Bi Shih Date: Tue, 19 Oct 2021 16:55:50 +0800 Message-ID: Subject: Re: [linux-next:master 4131/8410] drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_stateless.c:133:18: warning: Value stored to 'pfb' during its initialization is never read [clang-analyzer-deadcode.DeadStores] To: kernel test robot Cc: Yunfei Dong , llvm@lists.linux.dev, kbuild-all@lists.01.org, Linux Memory Management List , Mauro Carvalho Chehab , linux-media@vger.kernel.org, Alexandre Courbot , Hans Verkuil Content-Type: text/plain; charset="UTF-8" X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: 60C54B000185 X-Stat-Signature: kzyd1skj75hb59xxpxwabkagio5weu8w Authentication-Results: imf25.hostedemail.com; dkim=pass header.d=google.com header.s=20210112 header.b=ilXuMmMj; spf=pass (imf25.hostedemail.com: domain of tzungbi@google.com designates 209.85.210.173 as permitted sender) smtp.mailfrom=tzungbi@google.com; dmarc=pass (policy=reject) header.from=google.com X-HE-Tag: 1634633759-108178 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Tue, Oct 19, 2021 at 9:40 AM kernel test robot wrote: > > tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master > head: 7c832d2f9b959e3181370c8b0dacaf9efe13fc05 > commit: 8cdc3794b2e34b3ee11ddfccf4af3f64344a1a75 [4131/8410] media: mtk-vcodec: vdec: support stateless API > config: riscv-randconfig-c006-20211017 (attached as .config) > compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 8ca4b3ef19fe82d7ad6a6e1515317dcc01b41515) > reproduce (this is a W=1 build): > wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross > chmod +x ~/bin/make.cross > # install riscv cross compiling tool for clang build > # apt-get install binutils-riscv64-linux-gnu > # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=8cdc3794b2e34b3ee11ddfccf4af3f64344a1a75 > git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git > git fetch --no-tags linux-next master > git checkout 8cdc3794b2e34b3ee11ddfccf4af3f64344a1a75 > # save the attached .config to linux build tree > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv clang-analyzer > > If you fix the issue, kindly add following tag as appropriate > Reported-by: kernel test robot > > > clang-analyzer warnings: (new ones prefixed by >>) > > >> drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_stateless.c:133:18: warning: Value stored to 'pfb' during its initialization is never read [clang-analyzer-deadcode.DeadStores] > struct vdec_fb *pfb = &framebuf->frame_buffer; > ^~~ ~~~~~~~~~~~~~~~~~~~~~~~ Proposed a fix: https://patchwork.linuxtv.org/project/linux-media/patch/20211019085244.1403-1-tzungbi@google.com/