linux-kernel - drivers/media/platform/allegro-dvt/allegro-core.c:3206:34: warning: unused variable 'allegro_dt

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Message-ID: <202201122143.NO6WA9tr-lkp@intel.com>
Date:   Wed, 12 Jan 2022 21:04:37 +0800
From:   kernel test robot <lkp@...el.com>
To:     Michael Tretter <m.tretter@...gutronix.de>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media@...r.kernel.org, Hans Verkuil <hverkuil@...all.nl>
Subject: drivers/media/platform/allegro-dvt/allegro-core.c:3206:34: warning:
 unused variable 'allegro_dt_ids'

Hi Michael,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   daadb3bd0e8d3e317e36bc2c1542e86c528665e5
commit: d74d4e2359ec7985831192f9b5ee22ed5e55b81c media: allegro: move driver out of staging
date:   1 year ago
config: mips-buildonly-randconfig-r004-20220112 (https://download.01.org/0day-ci/archive/20220112/202201122143.NO6WA9tr-lkp@intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 244dd2913a43a200f5a6544d424cdc37b771028b)
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 mips cross compiling tool for clang build
        # apt-get install binutils-mips-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d74d4e2359ec7985831192f9b5ee22ed5e55b81c
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout d74d4e2359ec7985831192f9b5ee22ed5e55b81c
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=mips SHELL=/bin/bash drivers/media/platform/allegro-dvt/

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

All warnings (new ones prefixed by >>):

>> drivers/media/platform/allegro-dvt/allegro-core.c:3206:34: warning: unused variable 'allegro_dt_ids' [-Wunused-const-variable]
   static const struct of_device_id allegro_dt_ids[] = {
                                    ^
   1 warning generated.


vim +/allegro_dt_ids +3206 drivers/media/platform/allegro-dvt/allegro-core.c

f20387dfd065693 drivers/staging/media/allegro-dvt/allegro-core.c Michael Tretter 2019-05-28  3205  
f20387dfd065693 drivers/staging/media/allegro-dvt/allegro-core.c Michael Tretter 2019-05-28 @3206  static const struct of_device_id allegro_dt_ids[] = {
f20387dfd065693 drivers/staging/media/allegro-dvt/allegro-core.c Michael Tretter 2019-05-28  3207  	{ .compatible = "allegro,al5e-1.1" },
f20387dfd065693 drivers/staging/media/allegro-dvt/allegro-core.c Michael Tretter 2019-05-28  3208  	{ /* sentinel */ }
f20387dfd065693 drivers/staging/media/allegro-dvt/allegro-core.c Michael Tretter 2019-05-28  3209  };
f20387dfd065693 drivers/staging/media/allegro-dvt/allegro-core.c Michael Tretter 2019-05-28  3210  

:::::: The code at line 3206 was first introduced by commit
:::::: f20387dfd065693ba7ea2788a2f893bf653c9cb8 media: allegro: add Allegro DVT video IP core driver

:::::: TO: Michael Tretter <m.tretter@...gutronix.de>
:::::: CC: Mauro Carvalho Chehab <mchehab+samsung@...nel.org>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org