linux-kernel - drivers/media/platform/marvell-ccic/mmp-driver.c:366:34: warning: unused variable 'mmpcam_of

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Date:   Fri, 11 Feb 2022 14:25:10 +0800
From:   kernel test robot <lkp@...el.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org
Subject: drivers/media/platform/marvell-ccic/mmp-driver.c:366:34: warning:
 unused variable 'mmpcam_of_match'

Hi Arnd,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   f1baf68e1383f6ed93eb9cff2866d46562607a43
commit: b408b611eb951594691abfee8ca687b405d27757 mips: ar7: convert to CONFIG_COMMON_CLK
date:   8 months ago
config: mips-buildonly-randconfig-r001-20220211 (https://download.01.org/0day-ci/archive/20220211/202202111412.5iSkckar-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project f6685f774697c85d6a352dcea013f46a99f9fe31)
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=b408b611eb951594691abfee8ca687b405d27757
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout b408b611eb951594691abfee8ca687b405d27757
        # 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/atmel/ drivers/media/platform/marvell-ccic/

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/marvell-ccic/mmp-driver.c:366:34: warning: unused variable 'mmpcam_of_match' [-Wunused-const-variable]
   static const struct of_device_id mmpcam_of_match[] = {
                                    ^
   1 warning generated.


vim +/mmpcam_of_match +366 drivers/media/platform/marvell-ccic/mmp-driver.c

bb0a896e3d5083 drivers/media/video/marvell-ccic/mmp-driver.c    Jonathan Corbet 2011-12-30  365  
83c40e6611ec1e drivers/media/platform/marvell-ccic/mmp-driver.c Lubomir Rintel  2019-05-28 @366  static const struct of_device_id mmpcam_of_match[] = {
83c40e6611ec1e drivers/media/platform/marvell-ccic/mmp-driver.c Lubomir Rintel  2019-05-28  367  	{ .compatible = "marvell,mmp2-ccic", },
83c40e6611ec1e drivers/media/platform/marvell-ccic/mmp-driver.c Lubomir Rintel  2019-05-28  368  	{},
83c40e6611ec1e drivers/media/platform/marvell-ccic/mmp-driver.c Lubomir Rintel  2019-05-28  369  };
08aac0e32fe44b drivers/media/platform/marvell-ccic/mmp-driver.c Lubomir Rintel  2019-07-22  370  MODULE_DEVICE_TABLE(of, mmpcam_of_match);
67a8dbbc4e04cd drivers/media/video/marvell-ccic/mmp-driver.c    Jonathan Corbet 2011-06-11  371  

:::::: The code at line 366 was first introduced by commit
:::::: 83c40e6611ec1e548ece34f6940f516333abc16a media: marvell-ccic/mmp: add devicetree support

:::::: TO: Lubomir Rintel <lkundrak@...sk>
:::::: 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