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Subjectdrivers/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: 3b69e8b4571125bec1f77f886174fe6cab6b9d75
commit: ffd0bbfb378ecd56eac22bf932ccdbf89ac7f725 hwspinlock: Allow drivers to be built with COMPILE_TEST
date: 2 months ago
config: arm-randconfig-r001-20200607 (attached as .config)
compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project e429cffd4f228f70c1d9df0e5d77c08590dd9766)
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 arm cross compiling tool for clang build
# apt-get install binutils-arm-linux-gnueabi
git checkout ffd0bbfb378ecd56eac22bf932ccdbf89ac7f725
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>, old 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@csr.com>
:::::: CC: Ohad Ben-Cohen <ohad@wizery.com>

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