tree: https://github.com/atishp04/linux sbi_pmu_v1 head: d82bc37d5a962b33af712da468a82d2ced9eb194 commit: 1657022d366b88348885102a415ff0c1e14e6976 [12/14] RISC-V: Add a simple platform driver for RISC-V legacy perf config: riscv-randconfig-r001-20210318 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project fcc1ce00931751ac02498986feb37744e9ace8de) 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 riscv cross compiling tool for clang build # apt-get install binutils-riscv64-linux-gnu # https://github.com/atishp04/linux/commit/1657022d366b88348885102a415ff0c1... git remote add atishp04 https://github.com/atishp04/linux git fetch --no-tags atishp04 sbi_pmu_v1 git checkout 1657022d366b88348885102a415ff0c1e14e6976 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): drivers/perf/riscv_pmu_legacy.c:76: warning: Function parameter or member 'pmu' not described in 'riscv_pmu_legacy_init' vim +76 drivers/perf/riscv_pmu_legacy.c 67 68 /** 69 * This is just a simple implementation to allow legacy implementations 70 * compatible with new RISC-V PMU driver framework. 71 * This driver only allows reading two counters i.e CYCLE & INSTRET. 72 * However, it can not start or stop the counter. Thus, it is not very useful 73 * will be removed in future. 74 */ 75 void riscv_pmu_legacy_init(struct riscv_pmu *pmu) --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org