Re: [PATCH v5 03/13] perf/x86/amd: add AMD Fam19h Branch Sampling support

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

Hi Stephane,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on next-20220125]
[cannot apply to tip/x86/core rafael-pm/linux-next tip/perf/core v5.17-rc1 v5.16 v5.16-rc8 v5.17-rc1]
[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/Stephane-Eranian/perf-core-add-perf_clear_branch_entry_bitfields-helper/20220127-083516
base:    d25ee88530253138d0b20d43511ca5acbda4e9f7
config: i386-randconfig-a011-20220124 (https://download.01.org/0day-ci/archive/20220127/202201271410.cro07bYq-lkp@intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project f400a6012c668dfaa73462caf067ceb074e66c47)
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/933d072f6e0c0409115a8038a89a56979a042d30
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Stephane-Eranian/perf-core-add-perf_clear_branch_entry_bitfields-helper/20220127-083516
        git checkout 933d072f6e0c0409115a8038a89a56979a042d30
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash arch/x86/events/amd/ drivers/acpi/

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 >>):

>> arch/x86/events/amd/core.c:676:24: warning: variable 'hwc' set but not used [-Wunused-but-set-variable]
           struct hw_perf_event *hwc;
                                 ^
   1 warning generated.


vim +/hwc +676 arch/x86/events/amd/core.c

   672	
   673	static void amd_pmu_enable_all(int added)
   674	{
   675		struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
 > 676		struct hw_perf_event *hwc;
   677		int idx;
   678	
   679		amd_brs_enable_all();
   680	
   681		for (idx = 0; idx < x86_pmu.num_counters; idx++) {
   682			hwc = &cpuc->events[idx]->hw;
   683	
   684			/* only activate events which are marked as active */
   685			if (!test_bit(idx, cpuc->active_mask))
   686				continue;
   687	
   688			amd_pmu_enable_event(cpuc->events[idx]);
   689		}
   690	}
   691	

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