linux-kernel - drivers/hwspinlock/sirf_hwspinlock.c:87:34: warning: unused variable 'sirf_hwpinlock

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Date:   Mon, 10 Aug 2020 03:07:26 +0800
From:   kernel test robot <lkp@...el.com>
To:     Baolin Wang <baolin.wang7@...il.com>
Cc:     kbuild-all@...ts.01.org, clang-built-linux@...glegroups.com,
        linux-kernel@...r.kernel.org,
        Bjorn Andersson <bjorn.andersson@...aro.org>
Subject: drivers/hwspinlock/sirf_hwspinlock.c:87:34: warning: unused variable
 'sirf_hwpinlock_ids'

Hi Baolin,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   06a81c1c7db9bd5de0bd38cd5acc44bb22b99150
commit: ffd0bbfb378ecd56eac22bf932ccdbf89ac7f725 hwspinlock: Allow drivers to be built with COMPILE_TEST
date:   5 months ago
config: x86_64-randconfig-a004-20200810 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 0b90a08f7722980f6074c6eada8022242408cdb4)
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 ffd0bbfb378ecd56eac22bf932ccdbf89ac7f725
        # 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/hwspinlock/sirf_hwspinlock.c:87:34: warning: unused variable 'sirf_hwpinlock_ids' [-Wunused-const-variable]
   static const struct of_device_id sirf_hwpinlock_ids[] = {
                                    ^
   1 warning generated.

vim +/sirf_hwpinlock_ids +87 drivers/hwspinlock/sirf_hwspinlock.c

cc16d664e21ef6 Wei Chen 2015-05-26  86  
cc16d664e21ef6 Wei Chen 2015-05-26 @87  static const struct of_device_id sirf_hwpinlock_ids[] = {
cc16d664e21ef6 Wei Chen 2015-05-26  88  	{ .compatible = "sirf,hwspinlock", },
cc16d664e21ef6 Wei Chen 2015-05-26  89  	{},
cc16d664e21ef6 Wei Chen 2015-05-26  90  };
cc16d664e21ef6 Wei Chen 2015-05-26  91  MODULE_DEVICE_TABLE(of, sirf_hwpinlock_ids);
cc16d664e21ef6 Wei Chen 2015-05-26  92  

:::::: The code at line 87 was first introduced by commit
:::::: cc16d664e21ef640faaf51e9952384cf90b92d9f hwspinlock: add a CSR atlas7 driver

:::::: TO: Wei Chen <wei.chen@....com>
:::::: CC: Ohad Ben-Cohen <ohad@...ery.com>

---
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" (33834 bytes)