[kbuild-all] [robh:arm64-user-perf-event-v11 4/5] arch/arm64/kernel/perf_event.c:1191:5: warning: no previous prototype for 'armv8pmu_proc_user_access_handler'

tree: https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git arm64-user-perf-event-v11 head: a5385068d760ce1abfab2609fdb662164f12c494 commit: e4f5fa6593ffb8f5e5c167566839f7ecf97628e2 [4/5] arm64: perf: Enable PMU counter userspace access for perf event config: arm64-randconfig-p001-20211019 (attached as .config) compiler: aarch64-linux-gcc (GCC) 11.2.0 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/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-v11 git checkout e4f5fa6593ffb8f5e5c167566839f7ecf97628e2 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross 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:143:51: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_L1D_CACHE_REFILL_RD' 143 | [C(L1D)][C(OP_READ)][C(RESULT_MISS)] = ARMV8_IMPDEF_PERFCTR_L1D_CACHE_REFILL_RD, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/arm64/include/asm/perf_event.h:111:65: warning: initialized field overwritten [-Woverride-init] 111 | #define ARMV8_IMPDEF_PERFCTR_L1D_CACHE_WR 0x41 | ^~~~ arch/arm64/kernel/perf_event.c:144:51: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_L1D_CACHE_WR' 144 | [C(L1D)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_L1D_CACHE_WR, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/arm64/include/asm/perf_event.h:111:65: note: (near initialization for 'armv8_vulcan_perf_cache_map[0][1][0]') 111 | #define ARMV8_IMPDEF_PERFCTR_L1D_CACHE_WR 0x41 | ^~~~ arch/arm64/kernel/perf_event.c:144:51: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_L1D_CACHE_WR' 144 | [C(L1D)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_L1D_CACHE_WR, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/arm64/include/asm/perf_event.h:113:65: warning: initialized field overwritten [-Woverride-init] 113 | #define ARMV8_IMPDEF_PERFCTR_L1D_CACHE_REFILL_WR 0x43 | ^~~~ arch/arm64/kernel/perf_event.c:145:51: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_L1D_CACHE_REFILL_WR' 145 | [C(L1D)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV8_IMPDEF_PERFCTR_L1D_CACHE_REFILL_WR, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/arm64/include/asm/perf_event.h:113:65: note: (near initialization for 'armv8_vulcan_perf_cache_map[0][1][1]') 113 | #define ARMV8_IMPDEF_PERFCTR_L1D_CACHE_REFILL_WR 0x43 | ^~~~ arch/arm64/kernel/perf_event.c:145:51: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_L1D_CACHE_REFILL_WR' 145 | [C(L1D)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV8_IMPDEF_PERFCTR_L1D_CACHE_REFILL_WR, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/arm64/include/asm/perf_event.h:122:65: warning: initialized field overwritten [-Woverride-init] 122 | #define ARMV8_IMPDEF_PERFCTR_L1D_TLB_RD 0x4E | ^~~~ arch/arm64/kernel/perf_event.c:147:51: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_L1D_TLB_RD' 147 | [C(DTLB)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_L1D_TLB_RD, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/arm64/include/asm/perf_event.h:122:65: note: (near initialization for 'armv8_vulcan_perf_cache_map[3][0][0]') 122 | #define ARMV8_IMPDEF_PERFCTR_L1D_TLB_RD 0x4E | ^~~~ arch/arm64/kernel/perf_event.c:147:51: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_L1D_TLB_RD' 147 | [C(DTLB)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_L1D_TLB_RD, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/arm64/include/asm/perf_event.h:123:65: warning: initialized field overwritten [-Woverride-init] 123 | #define ARMV8_IMPDEF_PERFCTR_L1D_TLB_WR 0x4F | ^~~~ arch/arm64/kernel/perf_event.c:148:52: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_L1D_TLB_WR' 148 | [C(DTLB)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_L1D_TLB_WR, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/arm64/include/asm/perf_event.h:123:65: note: (near initialization for 'armv8_vulcan_perf_cache_map[3][1][0]') 123 | #define ARMV8_IMPDEF_PERFCTR_L1D_TLB_WR 0x4F | ^~~~ arch/arm64/kernel/perf_event.c:148:52: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_L1D_TLB_WR' 148 | [C(DTLB)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_L1D_TLB_WR, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/arm64/include/asm/perf_event.h:120:65: warning: initialized field overwritten [-Woverride-init] 120 | #define ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_RD 0x4C | ^~~~ arch/arm64/kernel/perf_event.c:149:51: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_RD' 149 | [C(DTLB)][C(OP_READ)][C(RESULT_MISS)] = ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_RD, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/arm64/include/asm/perf_event.h:120:65: note: (near initialization for 'armv8_vulcan_perf_cache_map[3][0][1]') 120 | #define ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_RD 0x4C | ^~~~ arch/arm64/kernel/perf_event.c:149:51: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_RD' 149 | [C(DTLB)][C(OP_READ)][C(RESULT_MISS)] = ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_RD, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/arm64/include/asm/perf_event.h:121:65: warning: initialized field overwritten [-Woverride-init] 121 | #define ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_WR 0x4D | ^~~~ arch/arm64/kernel/perf_event.c:150:51: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_WR' 150 | [C(DTLB)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_WR, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/arm64/include/asm/perf_event.h:121:65: note: (near initialization for 'armv8_vulcan_perf_cache_map[3][1][1]') 121 | #define ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_WR 0x4D | ^~~~ arch/arm64/kernel/perf_event.c:150:51: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_WR' 150 | [C(DTLB)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_WR, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/arm64/include/asm/perf_event.h:137:65: warning: initialized field overwritten [-Woverride-init] 137 | #define ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_RD 0x60 | ^~~~ arch/arm64/kernel/perf_event.c:152:51: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_RD' 152 | [C(NODE)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_RD, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/arm64/include/asm/perf_event.h:137:65: note: (near initialization for 'armv8_vulcan_perf_cache_map[6][0][0]') 137 | #define ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_RD 0x60 | ^~~~ arch/arm64/kernel/perf_event.c:152:51: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_RD' 152 | [C(NODE)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_RD, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/arm64/include/asm/perf_event.h:138:65: warning: initialized field overwritten [-Woverride-init] 138 | #define ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_WR 0x61 | ^~~~ arch/arm64/kernel/perf_event.c:153:52: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_WR' 153 | [C(NODE)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_WR, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/arm64/include/asm/perf_event.h:138:65: note: (near initialization for 'armv8_vulcan_perf_cache_map[6][1][0]') 138 | #define ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_WR 0x61 | ^~~~ arch/arm64/kernel/perf_event.c:153:52: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_WR' 153 | [C(NODE)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_WR, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 1191 | int armv8pmu_proc_user_access_handler(struct ctl_table *table, int write, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ cppcheck possible warnings: (new ones prefixed by >>, may not real problems) return event->attr.config1 & 0x2; ^ vim +/armv8pmu_proc_user_access_handler +1191 arch/arm64/kernel/perf_event.c 1190 1192 void *buffer, size_t *lenp, loff_t *ppos) 1193 { 1194 int ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos); 1195 if (ret || !write || sysctl_perf_user_access) 1196 return ret; 1197 1198 on_each_cpu(armv8pmu_disable_user_access_ipi, NULL, 1); 1199 return 0; 1200 } 1201 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org