[openeuler:OLK-6.6 1870/13938] drivers/cpufreq/cppc_cpufreq.c:852:19: error: incomplete definition of type 'struct fb_ctr_pair'

[kernel test robot <lkp@intel.com>]

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@intel.com/config)
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@intel.com/reproduce)

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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