[kbuild-all] [robh:arm64-user-perf-event-v8 3/5] arch/arm64/kernel/perf_event.c:935:6: warning: no previous prototype for function 'armv8pmu_sched_task'

tree: https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git arm64-user-perf-event-v8 head: 1e94e1d70340ac1a71ae202803c7c3a94f22d578 commit: 8133b48895ce0f1df67c38c37cb7025f1e62eebf [3/5] arm64: perf: Enable PMU counter userspace access for perf event config: arm64-randconfig-r033-20210517 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project ceb1ac9812cb0972cfa34cecc5e5704ae2a22063) 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/robh/linux.git/commit/?id... git remote add robh https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git git fetch --no-tags robh arm64-user-perf-event-v8 git checkout 8133b48895ce0f1df67c38c37cb7025f1e62eebf # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=arm64 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 >>): ^~~~ arch/arm64/kernel/perf_event.c:140:2: note: previous initialization is here PERF_CACHE_MAP_ALL_UNSUPPORTED, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/perf/arm_pmu.h:41:31: note: expanded from macro 'PERF_CACHE_MAP_ALL_UNSUPPORTED' [0 ... C(RESULT_MAX) - 1] = CACHE_OP_UNSUPPORTED, \ ^~~~~~~~~~~~~~~~~~~~ include/linux/perf/arm_pmu.h:33:31: note: expanded from macro 'CACHE_OP_UNSUPPORTED' #define CACHE_OP_UNSUPPORTED 0xFFFF ^~~~~~ arch/arm64/kernel/perf_event.c:147:44: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides] [C(DTLB)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_L1D_TLB_RD, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/arm64/include/asm/perf_event.h:122:44: note: expanded from macro 'ARMV8_IMPDEF_PERFCTR_L1D_TLB_RD' #define ARMV8_IMPDEF_PERFCTR_L1D_TLB_RD 0x4E ^~~~ arch/arm64/kernel/perf_event.c:140:2: note: previous initialization is here PERF_CACHE_MAP_ALL_UNSUPPORTED, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/perf/arm_pmu.h:41:31: note: expanded from macro 'PERF_CACHE_MAP_ALL_UNSUPPORTED' [0 ... C(RESULT_MAX) - 1] = CACHE_OP_UNSUPPORTED, \ ^~~~~~~~~~~~~~~~~~~~ include/linux/perf/arm_pmu.h:33:31: note: expanded from macro 'CACHE_OP_UNSUPPORTED' #define CACHE_OP_UNSUPPORTED 0xFFFF ^~~~~~ arch/arm64/kernel/perf_event.c:148:45: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides] [C(DTLB)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_L1D_TLB_WR, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/arm64/include/asm/perf_event.h:123:44: note: expanded from macro 'ARMV8_IMPDEF_PERFCTR_L1D_TLB_WR' #define ARMV8_IMPDEF_PERFCTR_L1D_TLB_WR 0x4F ^~~~ arch/arm64/kernel/perf_event.c:140:2: note: previous initialization is here PERF_CACHE_MAP_ALL_UNSUPPORTED, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/perf/arm_pmu.h:41:31: note: expanded from macro 'PERF_CACHE_MAP_ALL_UNSUPPORTED' [0 ... C(RESULT_MAX) - 1] = CACHE_OP_UNSUPPORTED, \ ^~~~~~~~~~~~~~~~~~~~ include/linux/perf/arm_pmu.h:33:31: note: expanded from macro 'CACHE_OP_UNSUPPORTED' #define CACHE_OP_UNSUPPORTED 0xFFFF ^~~~~~ arch/arm64/kernel/perf_event.c:149:42: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides] [C(DTLB)][C(OP_READ)][C(RESULT_MISS)] = ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_RD, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/arm64/include/asm/perf_event.h:120:50: note: expanded from macro 'ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_RD' #define ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_RD 0x4C ^~~~ arch/arm64/kernel/perf_event.c:140:2: note: previous initialization is here PERF_CACHE_MAP_ALL_UNSUPPORTED, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/perf/arm_pmu.h:41:31: note: expanded from macro 'PERF_CACHE_MAP_ALL_UNSUPPORTED' [0 ... C(RESULT_MAX) - 1] = CACHE_OP_UNSUPPORTED, \ ^~~~~~~~~~~~~~~~~~~~ include/linux/perf/arm_pmu.h:33:31: note: expanded from macro 'CACHE_OP_UNSUPPORTED' #define CACHE_OP_UNSUPPORTED 0xFFFF ^~~~~~ arch/arm64/kernel/perf_event.c:150:43: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides] [C(DTLB)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_WR, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/arm64/include/asm/perf_event.h:121:50: note: expanded from macro 'ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_WR' #define ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_WR 0x4D ^~~~ arch/arm64/kernel/perf_event.c:140:2: note: previous initialization is here PERF_CACHE_MAP_ALL_UNSUPPORTED, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/perf/arm_pmu.h:41:31: note: expanded from macro 'PERF_CACHE_MAP_ALL_UNSUPPORTED' [0 ... C(RESULT_MAX) - 1] = CACHE_OP_UNSUPPORTED, \ ^~~~~~~~~~~~~~~~~~~~ include/linux/perf/arm_pmu.h:33:31: note: expanded from macro 'CACHE_OP_UNSUPPORTED' #define CACHE_OP_UNSUPPORTED 0xFFFF ^~~~~~ arch/arm64/kernel/perf_event.c:152:44: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides] [C(NODE)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_RD, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/arm64/include/asm/perf_event.h:137:46: note: expanded from macro 'ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_RD' #define ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_RD 0x60 ^~~~ arch/arm64/kernel/perf_event.c:140:2: note: previous initialization is here PERF_CACHE_MAP_ALL_UNSUPPORTED, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/perf/arm_pmu.h:41:31: note: expanded from macro 'PERF_CACHE_MAP_ALL_UNSUPPORTED' [0 ... C(RESULT_MAX) - 1] = CACHE_OP_UNSUPPORTED, \ ^~~~~~~~~~~~~~~~~~~~ include/linux/perf/arm_pmu.h:33:31: note: expanded from macro 'CACHE_OP_UNSUPPORTED' #define CACHE_OP_UNSUPPORTED 0xFFFF ^~~~~~ arch/arm64/kernel/perf_event.c:153:45: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides] [C(NODE)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_WR, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/arm64/include/asm/perf_event.h:138:46: note: expanded from macro 'ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_WR' #define ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_WR 0x61 ^~~~ arch/arm64/kernel/perf_event.c:140:2: note: previous initialization is here PERF_CACHE_MAP_ALL_UNSUPPORTED, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/perf/arm_pmu.h:41:31: note: expanded from macro 'PERF_CACHE_MAP_ALL_UNSUPPORTED' [0 ... C(RESULT_MAX) - 1] = CACHE_OP_UNSUPPORTED, \ ^~~~~~~~~~~~~~~~~~~~ include/linux/perf/arm_pmu.h:33:31: note: expanded from macro 'CACHE_OP_UNSUPPORTED' #define CACHE_OP_UNSUPPORTED 0xFFFF ^~~~~~ void armv8pmu_sched_task(struct perf_event_context *ctx, bool sched_in) ^ arch/arm64/kernel/perf_event.c:935:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void armv8pmu_sched_task(struct perf_event_context *ctx, bool sched_in) ^ static 57 warnings generated. vim +/armv8pmu_sched_task +935 arch/arm64/kernel/perf_event.c 934 936 { 937 if (sched_in && atomic_read(&ctx->nr_user)) 938 armv8pmu_enable_user_access(to_arm_pmu(ctx->pmu)); 939 else 940 armv8pmu_disable_user_access(); 941 } 942 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org