Hi Kajol,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on linux-nvdimm/libnvdimm-for-next]
[also build test WARNING on powerpc/next linus/master v5.14 next-20210903]
[cannot apply to mpe/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/Kajol-Jain/Add-perf-interface-to-expose-nvdimm/20210903-131212
base:   https://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm.git libnvdimm-for-next
config: x86_64-randconfig-a005-20210903 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 1104e3258b5064e7110cc297e2cec60ac9acfc0a)
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
        # https://github.com/0day-ci/linux/commit/f841601cc058e6033761bd2157b886a30190fc3a
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Kajol-Jain/Add-perf-interface-to-expose-nvdimm/20210903-131212
        git checkout f841601cc058e6033761bd2157b886a30190fc3a
        # 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 <redacted>

All warnings (new ones prefixed by >>):

quoted

drivers/nvdimm/nd_perf.c:159:6: warning: no previous prototype for function 'nvdimm_pmu_free_hotplug_memory' [-Wmissing-prototypes]

   void nvdimm_pmu_free_hotplug_memory(struct nvdimm_pmu *nd_pmu)
        ^
   drivers/nvdimm/nd_perf.c:159:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void nvdimm_pmu_free_hotplug_memory(struct nvdimm_pmu *nd_pmu)
   ^
   static 
   1 warning generated.


vim +/nvdimm_pmu_free_hotplug_memory +159 drivers/nvdimm/nd_perf.c

   158	
 > 159	void nvdimm_pmu_free_hotplug_memory(struct nvdimm_pmu *nd_pmu)
   160	{
   161		cpuhp_state_remove_instance_nocalls(nd_pmu->cpuhp_state, &nd_pmu->node);
   162		cpuhp_remove_multi_state(nd_pmu->cpuhp_state);
   163	
   164		if (nd_pmu->attr_groups[NVDIMM_PMU_CPUMASK_ATTR])
   165			kfree(nd_pmu->attr_groups[NVDIMM_PMU_CPUMASK_ATTR]->attrs);
   166		kfree(nd_pmu->attr_groups[NVDIMM_PMU_CPUMASK_ATTR]);
   167	}
   168	

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