linux-kernel - drivers/mfd/khadas-mcu.c:125:34: warning: unused variable 'khadas_mcu_of

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Message-ID: <202008162228.YxcmQ3Ss%lkp@intel.com>
Date:   Sun, 16 Aug 2020 22:02:31 +0800
From:   kernel test robot <lkp@...el.com>
To:     Neil Armstrong <narmstrong@...libre.com>
Cc:     kbuild-all@...ts.01.org, clang-built-linux@...glegroups.com,
        linux-kernel@...r.kernel.org, Lee Jones <lee.jones@...aro.org>
Subject: drivers/mfd/khadas-mcu.c:125:34: warning: unused variable
 'khadas_mcu_of_match'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   4b6c093e21d36bede0fd88fd0aeb3b03647260e4
commit: 6c27219e34911601955b72c754adfc11c527ba7b mfd: Add support for the Khadas System control Microcontroller
date:   8 weeks ago
config: x86_64-randconfig-r034-20200816 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project ab9fc8bae805c785066779e76e7846aabad5609e)
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 x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        git checkout 6c27219e34911601955b72c754adfc11c527ba7b
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

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/mfd/khadas-mcu.c:125:34: warning: unused variable 'khadas_mcu_of_match' [-Wunused-const-variable]
   static const struct of_device_id khadas_mcu_of_match[] = {
                                    ^
   1 warning generated.

# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6c27219e34911601955b72c754adfc11c527ba7b
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 6c27219e34911601955b72c754adfc11c527ba7b
vim +/khadas_mcu_of_match +125 drivers/mfd/khadas-mcu.c

   124	
 > 125	static const struct of_device_id khadas_mcu_of_match[] = {
   126		{ .compatible = "khadas,mcu", },
   127		{},
   128	};
   129	MODULE_DEVICE_TABLE(of, khadas_mcu_of_match);
   130	

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

Download attachment ".config.gz" of type "application/gzip" (37668 bytes)