Hi Lukasz,

[FYI, it's a private test report for your RFC patch.]
[auto build test ERROR on pm/linux-next]
[also build test ERROR on linux/master linus/master v5.13 next-20210706]
[cannot apply to daniel.lezcano/clockevents/next]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Lukasz-Luba/Introduce-Active-Stats-framework-with-CPU-performance-statistics/20210706-211925
base:   https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next
config: arm64-randconfig-s032-20210706 (attached as .config)
compiler: aarch64-linux-gcc (GCC) 9.3.0
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: v0.6.3-341-g8af24329-dirty
        # https://github.com/0day-ci/linux/commit/fa2d36779959e61bab610a4aad0159e4565d60a5
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Lukasz-Luba/Introduce-Active-Stats-framework-with-CPU-performance-statistics/20210706-211925
        git checkout fa2d36779959e61bab610a4aad0159e4565d60a5
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=arm64 

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

All errors (new ones prefixed by >>):

   drivers/thermal/cpufreq_cooling.c: In function 'cpufreq_cooling_unregister':
>> drivers/thermal/cpufreq_cooling.c:824:2: error: implicit declaration of function 'clean_cpu_monitoring' [-Werror=implicit-function-declaration]
     824 |  clean_cpu_monitoring(cpufreq_cdev);
         |  ^~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +/clean_cpu_monitoring +824 drivers/thermal/cpufreq_cooling.c

   806	
   807	/**
   808	 * cpufreq_cooling_unregister - function to remove cpufreq cooling device.
   809	 * @cdev: thermal cooling device pointer.
   810	 *
   811	 * This interface function unregisters the "thermal-cpufreq-%x" cooling device.
   812	 */
   813	void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev)
   814	{
   815		struct cpufreq_cooling_device *cpufreq_cdev;
   816	
   817		if (!cdev)
   818			return;
   819	
   820		cpufreq_cdev = cdev->devdata;
   821	
   822		thermal_cooling_device_unregister(cdev);
   823		freq_qos_remove_request(&cpufreq_cdev->qos_req);
 > 824		clean_cpu_monitoring(cpufreq_cdev);

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