Hi Zeng, FYI, the error/warning still remains. tree: https://gitee.com/openeuler/kernel.git OLK-6.6 head: 292de9750592324fa903dc314670538f50b4c19a commit: 12f136b2134d4ded731c3ef23ac08c85b9c0b1fa [1870/13938] cpufreq: CPPC: Keep the target core awake when reading its cpufreq rate config: arm64-randconfig-001-20240913 (https://download.01.org/0day-ci/archive/20240914/202409141237.GV6bZXKN-lkp@i...) compiler: clang version 15.0.7 (https://github.com/llvm/llvm-project 8dfdcc7b7bf66834a761bd8de445840ef68e4d1a) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240914/202409141237.GV6bZXKN-lkp@i...) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202409141237.GV6bZXKN-lkp@intel.com/ All errors (new ones prefixed by >>):

...

drivers/cpufreq/cppc_cpufreq.c:852:19: error: incomplete definition of type 'struct fb_ctr_pair' int cpu = fb_ctrs->cpu; ~~~~~~~^ drivers/cpufreq/cppc_cpufreq.c:851:9: note: forward declaration of 'struct fb_ctr_pair' struct fb_ctr_pair *fb_ctrs = val; ^ drivers/cpufreq/cppc_cpufreq.c:855:40: error: incomplete definition of type 'struct fb_ctr_pair' ret = cppc_get_perf_ctrs(cpu, &fb_ctrs->fb_ctrs_t0); ~~~~~~~^ drivers/cpufreq/cppc_cpufreq.c:851:9: note: forward declaration of 'struct fb_ctr_pair' struct fb_ctr_pair *fb_ctrs = val; ^ drivers/cpufreq/cppc_cpufreq.c:861:41: error: incomplete definition of type 'struct fb_ctr_pair' return cppc_get_perf_ctrs(cpu, &fb_ctrs->fb_ctrs_t1); ~~~~~~~^ drivers/cpufreq/cppc_cpufreq.c:851:9: note: forward declaration of 'struct fb_ctr_pair' struct fb_ctr_pair *fb_ctrs = val; ^ drivers/cpufreq/cppc_cpufreq.c:866:21: error: variable has incomplete type 'struct fb_ctr_pair' struct fb_ctr_pair fb_ctrs = { .cpu = cpu, }; ^ drivers/cpufreq/cppc_cpufreq.c:866:9: note: forward declaration of 'struct fb_ctr_pair' struct fb_ctr_pair fb_ctrs = { .cpu = cpu, }; ^ 4 errors generated.

vim +852 drivers/cpufreq/cppc_cpufreq.c 848 849 static int cppc_get_perf_ctrs_pair(void *val) 850 { 851 struct fb_ctr_pair *fb_ctrs = val;

852 int cpu = fb_ctrs->cpu; 853 int ret; 854 855 ret = cppc_get_perf_ctrs(cpu, &fb_ctrs->fb_ctrs_t0); 856 if (ret) 857 return ret; 858 859 udelay(2); /* 2usec delay between sampling */ 860 861 return cppc_get_perf_ctrs(cpu, &fb_ctrs->fb_ctrs_t1); 862 } 863 864 static unsigned int cppc_cpufreq_get_rate(unsigned int cpu) 865 { 866 struct fb_ctr_pair fb_ctrs = { .cpu = cpu, }; 867 struct cpufreq_policy *policy = cpufreq_cpu_get(cpu); 868 struct cppc_cpudata *cpu_data = policy->driver_data; 869 u64 delivered_perf; 870 int ret; 871 872 cpufreq_cpu_put(policy); 873 874 if (cpu_has_amu_feat(cpu)) 875 ret = smp_call_on_cpu(cpu, cppc_get_perf_ctrs_pair, 876 &fb_ctrs, false); 877 else 878 ret = cppc_get_perf_ctrs_pair(&fb_ctrs); 879 880 if (ret) 881 return 0; 882 883 delivered_perf = cppc_perf_from_fbctrs(cpu_data, 884 &fb_ctrs.fb_ctrs_t0, 885 &fb_ctrs.fb_ctrs_t1); 886 887 return cppc_cpufreq_perf_to_khz(cpu_data, delivered_perf); 888 } 889

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