Messages in this thread | | | Date | Mon, 20 Jun 2022 11:15:38 +0800 | From | kernel test robot <> | Subject | [morse:mpam/snapshot/v5.18 145/146] drivers/perf/resctrl_pmu.c:241:11: warning: variable 'id' is uninitialized when used within its own initialization |
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/morse/linux.git mpam/snapshot/v5.18 head: bac90d25cbdee0fc233b9b1c47d5b6f44101a384 commit: 03bff3df8a6f1e3120c7140d4c569bbb78d6e6d4 [145/146] drivers/perf: Add PMU to support reading resctrl counters via perf config: arm64-allmodconfig (https://download.01.org/0day-ci/archive/20220620/202206201130.h6t8Rjbz-lkp@intel.com/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project af6d2a0b6825e71965f3e2701a63c239fa0ad70f) 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 # install arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/morse/linux.git/commit/?id=03bff3df8a6f1e3120c7140d4c569bbb78d6e6d4 git remote add morse https://git.kernel.org/pub/scm/linux/kernel/git/morse/linux.git git fetch --no-tags morse mpam/snapshot/v5.18 git checkout 03bff3df8a6f1e3120c7140d4c569bbb78d6e6d4 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash drivers/perf/
If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
>> drivers/perf/resctrl_pmu.c:241:11: warning: variable 'id' is uninitialized when used within its own initialization [-Wuninitialized] u64 id = id; ~~ ^~ 1 warning generated.
vim +/id +241 drivers/perf/resctrl_pmu.c
232 233 /* 234 * Not all architetures do anything with resctrl_arch_mon_ctx_alloc_no_wait(), 235 * so hwc->idx may be meaningless. 236 */ 237 static int resctrl_pmu_event_idx(struct perf_event *event) 238 { 239 u16 event_num = get_event(event); 240 u32 closid, rmid, idx; > 241 u64 id = id; 242 243 __resctrl_id_decode(id, &closid, &rmid); 244 idx = resctrl_arch_rmid_idx_encode(closid, rmid); 245 246 return idx << ilog2(RESCTRL_MAX_EVENT_NUM) | event_num; 247 } 248
-- 0-DAY CI Kernel Test Service https://01.org/lkp
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