[openeuler:OLK-6.6 2139/2139] drivers/cpufreq/cppc_cpufreq.c:852:19: error: dereferencing pointer to incomplete type 'struct fb_ctr_pair'

[openeuler:OLK-6.6 2139/2139] drivers/cpufreq/cppc_cpufreq.c:852:19: error: dereferencing pointer to incomplete type 'struct fb_ctr_pair'

[kernel test robot]

tree:   https://gitee.com/openeuler/kernel.git OLK-6.6
head:   bf197758b04f43e61ebab66520f1420c1b64853c
commit: 12f136b2134d4ded731c3ef23ac08c85b9c0b1fa [2139/2139] cpufreq: CPPC: Keep the target core awake when reading its cpufreq rate
config: arm64-randconfig-002-20250421 (https://download.01.org/0day-ci/archive/20250421/202504211352.ik4vkTIa-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 7.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250421/202504211352.ik4vkTIa-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/202504211352.ik4vkTIa-lkp@intel.com/

All errors (new ones prefixed by >>):

   drivers/cpufreq/cppc_cpufreq.c: In function 'cppc_get_perf_ctrs_pair':
>> drivers/cpufreq/cppc_cpufreq.c:852:19: error: dereferencing pointer to incomplete type 'struct fb_ctr_pair'
     int cpu = fb_ctrs->cpu;
                      ^~
   drivers/cpufreq/cppc_cpufreq.c: In function 'cppc_cpufreq_get_rate':
   drivers/cpufreq/cppc_cpufreq.c:866:9: error: variable 'fb_ctrs' has initializer but incomplete type
     struct fb_ctr_pair fb_ctrs = { .cpu = cpu, };
            ^~~~~~~~~~~
   drivers/cpufreq/cppc_cpufreq.c:866:34: error: 'struct fb_ctr_pair' has no member named 'cpu'
     struct fb_ctr_pair fb_ctrs = { .cpu = cpu, };
                                     ^~~
   drivers/cpufreq/cppc_cpufreq.c:866:40: warning: excess elements in struct initializer
     struct fb_ctr_pair fb_ctrs = { .cpu = cpu, };
                                           ^~~
   drivers/cpufreq/cppc_cpufreq.c:866:40: note: (near initialization for 'fb_ctrs')
   drivers/cpufreq/cppc_cpufreq.c:866:21: error: storage size of 'fb_ctrs' isn't known
     struct fb_ctr_pair fb_ctrs = { .cpu = cpu, };
                        ^~~~~~~
   drivers/cpufreq/cppc_cpufreq.c:866:21: warning: unused variable 'fb_ctrs' [-Wunused-variable]


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	

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