linux-kernel - drivers/mux/adgs1408.c:112:34: warning: unused variable 'adgs1408_of

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Message-ID: <202005201042.yjSO10j2%lkp@intel.com>
Date:   Wed, 20 May 2020 10:22:45 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Chris Packham <chris.packham@...iedtelesis.co.nz>
Cc:     kbuild-all@...ts.01.org, clang-built-linux@...glegroups.com,
        linux-kernel@...r.kernel.org, Mark Brown <broonie@...nel.org>,
        Andy Shevchenko <andy.shevchenko@...il.com>
Subject: drivers/mux/adgs1408.c:112:34: warning: unused variable
 'adgs1408_of_match'

Hi Chris,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   115a54162a6c0d0ef2aef25ebd0b61fc5e179ebe
commit: e9e40543ad5b38b848879768359fd13650529961 spi: Add generic SPI multiplexer
date:   3 months ago
config: x86_64-randconfig-r022-20200519 (attached as .config)
compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 135b877874fae96b4372c8a3fbfaa8ff44ff86e3)
reproduce:
        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 e9e40543ad5b38b848879768359fd13650529961
        # 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: kbuild test robot <lkp@...el.com>

All warnings (new ones prefixed by >>, old ones prefixed by <<):

drivers/mux/adgs1408.c:62:12: warning: cast to smaller integer type 'enum adgs1408_chip_id' from 'const void *' [-Wvoid-pointer-to-enum-cast]
chip_id = (enum adgs1408_chip_id)of_device_get_match_data(dev);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/mux/adgs1408.c:112:34: warning: unused variable 'adgs1408_of_match' [-Wunused-const-variable]
static const struct of_device_id adgs1408_of_match[] = {
^
2 warnings generated.

vim +/adgs1408_of_match +112 drivers/mux/adgs1408.c

8b9ce6954c05e3 Mircea Caprioru 2018-08-01  111  
8b9ce6954c05e3 Mircea Caprioru 2018-08-01 @112  static const struct of_device_id adgs1408_of_match[] = {
8b9ce6954c05e3 Mircea Caprioru 2018-08-01  113  	{ .compatible = "adi,adgs1408", .data = (void *)ADGS1408, },
8b9ce6954c05e3 Mircea Caprioru 2018-08-01  114  	{ .compatible = "adi,adgs1409", .data = (void *)ADGS1409, },
8b9ce6954c05e3 Mircea Caprioru 2018-08-01  115  	{ }
8b9ce6954c05e3 Mircea Caprioru 2018-08-01  116  };
8b9ce6954c05e3 Mircea Caprioru 2018-08-01  117  MODULE_DEVICE_TABLE(of, adgs1408_of_match);
8b9ce6954c05e3 Mircea Caprioru 2018-08-01  118  

:::::: The code at line 112 was first introduced by commit
:::::: 8b9ce6954c05e3e4115f54444c7eaf2aa2dd5e65 mux: adgs1408: new driver for Analog Devices ADGS1408/1409 mux

:::::: TO: Mircea Caprioru <mircea.caprioru@...log.com>
:::::: CC: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

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

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