linux-kernel - drivers/remoteproc/mtk_scp.c:645:34: warning: unused variable 'mtk_scp_of

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Message-ID: <202011020817.nhpgLbGq-lkp@intel.com>
Date:   Mon, 2 Nov 2020 08:08:20 +0800
From:   kernel test robot <lkp@...el.com>
To:     Alexandre Courbot <acourbot@...omium.org>
Cc:     kbuild-all@...ts.01.org, clang-built-linux@...glegroups.com,
        linux-kernel@...r.kernel.org,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media@...r.kernel.org
Subject: drivers/remoteproc/mtk_scp.c:645:34: warning: unused variable
 'mtk_scp_of_match'

Hi Alexandre,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   3cea11cd5e3b00d91caf0b4730194039b45c5891
commit: cbd2dca74926c0e4610c40923cc786b732c9e8ef remoteproc: scp: add COMPILE_TEST dependency
date:   5 weeks ago
config: x86_64-randconfig-a005-20201102 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 235dfcf70abca65dba5d80f1a42d1485bab8980c)
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
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=cbd2dca74926c0e4610c40923cc786b732c9e8ef
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout cbd2dca74926c0e4610c40923cc786b732c9e8ef
        # 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/remoteproc/mtk_scp.c:645:34: warning: unused variable 'mtk_scp_of_match' [-Wunused-const-variable]
   static const struct of_device_id mtk_scp_of_match[] = {
                                    ^
   1 warning generated.

vim +/mtk_scp_of_match +645 drivers/remoteproc/mtk_scp.c

63c13d61eafe46 Erin Lo 2019-11-12  644  
63c13d61eafe46 Erin Lo 2019-11-12 @645  static const struct of_device_id mtk_scp_of_match[] = {
63c13d61eafe46 Erin Lo 2019-11-12  646  	{ .compatible = "mediatek,mt8183-scp"},
63c13d61eafe46 Erin Lo 2019-11-12  647  	{},
63c13d61eafe46 Erin Lo 2019-11-12  648  };
63c13d61eafe46 Erin Lo 2019-11-12  649  MODULE_DEVICE_TABLE(of, mtk_scp_of_match);
63c13d61eafe46 Erin Lo 2019-11-12  650  

:::::: The code at line 645 was first introduced by commit
:::::: 63c13d61eafe4606f1c16c54da40c4eee78e9edf remoteproc/mediatek: add SCP support for mt8183

:::::: TO: Erin Lo <erin.lo@...iatek.com>
:::::: CC: Bjorn Andersson <bjorn.andersson@...aro.org>

---
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" (44158 bytes)