From: Tzung-Bi Shih <tzungbi@google.com>
To: kernel test robot <yujie.liu@intel.com>
Cc: Yunfei Dong <Yunfei.Dong@mediatek.com>,
llvm@lists.linux.dev, kbuild-all@lists.01.org,
Linux Memory Management List <linux-mm@kvack.org>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
linux-media@vger.kernel.org,
Alexandre Courbot <acourbot@chromium.org>,
Hans Verkuil <hverkuil@xs4all.nl>
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]
Date: Tue, 19 Oct 2021 16:55:50 +0800 [thread overview]
Message-ID: <CA+Px+wX5NgbA_0VcS9pJ_L5=_znTca6LtsLYbCsh3ksro_2qzA@mail.gmail.com> (raw)
In-Reply-To: <eb2b58dc-3600-70d3-147a-c356d24feabd@intel.com>
On Tue, Oct 19, 2021 at 9:40 AM kernel test robot <yujie.liu@intel.com> 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 <lkp@intel.com>
>
>
> 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/
prev parent reply other threads:[~2021-10-19 8:56 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <202110172146.wMBY6qzo-lkp@intel.com>
2021-10-19 7:40 ` [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] kernel test robot
2021-10-19 8:55 ` Tzung-Bi Shih [this message]
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