drivers/perf/arm-cmn.c:356:15: sparse: sparse: symbol 'arm_cmn_debugfs' was not declared. Should it be static?

[kernel test robot <lkp@intel.com>]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   88808fbbead481aedb46640a5ace69c58287f56a
commit: a88fa6c28b867a387e3af202d6dbbb754d3aa2f1 perf/arm-cmn: Add debugfs topology info
date:   7 weeks ago
config: sparc64-randconfig-s032-20220203 (https://download.01.org/0day-ci/archive/20220203/202202030812.II1K2ZXf-lkp(a)intel.com/config)
compiler: sparc64-linux-gcc (GCC) 11.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.4-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a88fa6c28b867a387e3af202d6dbbb754d3aa2f1
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout a88fa6c28b867a387e3af202d6dbbb754d3aa2f1
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=sparc64 SHELL=/bin/bash drivers/perf/

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


sparse warnings: (new ones prefixed by >>)
>> drivers/perf/arm-cmn.c:356:15: sparse: sparse: symbol 'arm_cmn_debugfs' was not declared. Should it be static?

vim +/arm_cmn_debugfs +356 drivers/perf/arm-cmn.c

   355	
 > 356	struct dentry *arm_cmn_debugfs;
   357	

---
0-DAY CI Kernel Test Service, Intel Corporation
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