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02yMpmBOqCZNA2PTD/aOyrCUO0Qn40kbHlevAb2ylLeoHKH79wh+rZAdnPutU7BgGqHrkNmV3+g+VKZWlI1qbQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN6PR11MB2653 X-OriginatorOrg: intel.com Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org tree: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git perf/core head: 7bebfe9dd802b80abff5a43e00ab68d98893a22c commit: ada543459cab7f653dcacdaba4011a8bb19c627c [3/10] perf/x86/amd: Add AMD Fam19h Branch Sampling support config: x86_64-randconfig-c007 (https://download.01.org/0day-ci/archive/20220411/202204110431.SBvb4g5G-lkp@intel.com/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project c29a51b3a257908aebc01cd7c4655665db317d66) 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://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=ada543459cab7f653dcacdaba4011a8bb19c627c git remote add tip https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git git fetch --no-tags tip perf/core git checkout ada543459cab7f653dcacdaba4011a8bb19c627c # save the config file to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 clang-analyzer If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot clang-analyzer warnings: (new ones prefixed by >>) >> arch/x86/events/amd/core.c:722:3: warning: Value stored to 'hwc' is never read [clang-analyzer-deadcode.DeadStores] hwc = &cpuc->events[idx]->hw; ^ ~~~~~~~~~~~~~~~~~~~~~~ vim +/hwc +722 arch/x86/events/amd/core.c ada543459cab7f Stephane Eranian 2022-03-22 712 ada543459cab7f Stephane Eranian 2022-03-22 713 static void amd_pmu_enable_all(int added) ada543459cab7f Stephane Eranian 2022-03-22 714 { ada543459cab7f Stephane Eranian 2022-03-22 715 struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events); ada543459cab7f Stephane Eranian 2022-03-22 716 struct hw_perf_event *hwc; ada543459cab7f Stephane Eranian 2022-03-22 717 int idx; ada543459cab7f Stephane Eranian 2022-03-22 718 ada543459cab7f Stephane Eranian 2022-03-22 719 amd_brs_enable_all(); ada543459cab7f Stephane Eranian 2022-03-22 720 ada543459cab7f Stephane Eranian 2022-03-22 721 for (idx = 0; idx < x86_pmu.num_counters; idx++) { ada543459cab7f Stephane Eranian 2022-03-22 @722 hwc = &cpuc->events[idx]->hw; ada543459cab7f Stephane Eranian 2022-03-22 723 ada543459cab7f Stephane Eranian 2022-03-22 724 /* only activate events which are marked as active */ ada543459cab7f Stephane Eranian 2022-03-22 725 if (!test_bit(idx, cpuc->active_mask)) ada543459cab7f Stephane Eranian 2022-03-22 726 continue; ada543459cab7f Stephane Eranian 2022-03-22 727 ada543459cab7f Stephane Eranian 2022-03-22 728 amd_pmu_enable_event(cpuc->events[idx]); ada543459cab7f Stephane Eranian 2022-03-22 729 } ada543459cab7f Stephane Eranian 2022-03-22 730 } ada543459cab7f Stephane Eranian 2022-03-22 731 -- 0-DAY CI Kernel Test Service https://01.org/lkp