linux-kernel - drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c:49:34: warning: unused variable 'mdp_of

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Date:   Thu, 5 Jan 2023 02:51:20 +0800
From:   kernel test robot <lkp@...el.com>
To:     Moudy Ho <moudy.ho@...iatek.com>
Cc:     llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
        linux-kernel@...r.kernel.org,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media@...r.kernel.org,
        Ping-Hsun Wu <ping-hsun.wu@...iatek.com>,
        daoyuan huang <daoyuan.huang@...iatek.com>,
        Hans Verkuil <hverkuil@...all.nl>
Subject: drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c:49:34: warning:
 unused variable 'mdp_of_ids'

Hi Moudy,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   69b41ac87e4a664de78a395ff97166f0b2943210
commit: 61890ccaefaff89f5babd2c8412fd222c3f5fe38 media: platform: mtk-mdp3: add MediaTek MDP3 driver
date:   4 months ago
config: hexagon-randconfig-r045-20230105
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 7a8cb6cd4e3ff8aaadebff2b9d3ee9e2a326d444)
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
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=61890ccaefaff89f5babd2c8412fd222c3f5fe38
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 61890ccaefaff89f5babd2c8412fd222c3f5fe38
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash drivers/media/platform/mediatek/mdp3/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

>> drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c:49:34: warning: unused variable 'mdp_of_ids' [-Wunused-const-variable]
   static const struct of_device_id mdp_of_ids[] = {
                                    ^
   1 warning generated.

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for VIDEO_MEDIATEK_VPU
   Depends on [n]: MEDIA_SUPPORT [=y] && MEDIA_PLATFORM_SUPPORT [=y] && MEDIA_PLATFORM_DRIVERS [=y] && V4L_MEM2MEM_DRIVERS [=n] && VIDEO_DEV [=y] && (ARCH_MEDIATEK || COMPILE_TEST [=y])
   Selected by [y]:
   - VIDEO_MEDIATEK_MDP3 [=y] && MEDIA_SUPPORT [=y] && MEDIA_PLATFORM_SUPPORT [=y] && MEDIA_PLATFORM_DRIVERS [=y] && (MTK_IOMMU [=n] || COMPILE_TEST [=y]) && VIDEO_DEV [=y] && (ARCH_MEDIATEK || COMPILE_TEST [=y]) && HAS_DMA [=y] && REMOTEPROC [=y]


vim +/mdp_of_ids +49 drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c

    48	
  > 49	static const struct of_device_id mdp_of_ids[] = {
    50		{ .compatible = "mediatek,mt8183-mdp3-rdma",
    51		  .data = &mt8183_mdp_driver_data,
    52		},
    53		{},
    54	};
    55	MODULE_DEVICE_TABLE(of, mdp_of_ids);
    56	

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp

View attachment "config" of type "text/plain" (111226 bytes)