[PATCH 2/3] cpufreq: CPPC: Keep the target core awake when reading its cpufreq rate

[kernel test robot]

Hi Zeng,

kernel test robot noticed the following build errors:

[auto build test ERROR on rafael-pm/linux-next]
[also build test ERROR on rafael-pm/acpi-bus arm64/for-next/core linus/master v6.6 next-20231031]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Zeng-Heng/arm64-cpufeature-Export-cpu_has_amu_feat/20231025-173559
base:   https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next
patch link:    https://lore.kernel.org/r/20231025093847.3740104-3-zengheng4%40huawei.com
patch subject: [PATCH 2/3] cpufreq: CPPC: Keep the target core awake when reading its cpufreq rate
config: arm64-randconfig-003-20231101 (https://download.01.org/0day-ci/archive/20231101/202311010726.MjF49sPn-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231101/202311010726.MjF49sPn-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 at intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202311010726.MjF49sPn-lkp@intel.com/

All error/warnings (new ones prefixed by >>):

   drivers/cpufreq/cppc_cpufreq.c: In function 'cppc_get_perf_ctrs_pair':
>> drivers/cpufreq/cppc_cpufreq.c:852:26: error: invalid use of undefined type 'struct fb_ctr_pair'
     852 |         int cpu = fb_ctrs->cpu;
         |                          ^~
   drivers/cpufreq/cppc_cpufreq.c:855:47: error: invalid use of undefined type 'struct fb_ctr_pair'
     855 |         ret = cppc_get_perf_ctrs(cpu, &fb_ctrs->fb_ctrs_t0);
         |                                               ^~
   drivers/cpufreq/cppc_cpufreq.c:861:48: error: invalid use of undefined type 'struct fb_ctr_pair'
     861 |         return cppc_get_perf_ctrs(cpu, &fb_ctrs->fb_ctrs_t1);
         |                                                ^~
   drivers/cpufreq/cppc_cpufreq.c: In function 'cppc_cpufreq_get_rate':
>> drivers/cpufreq/cppc_cpufreq.c:866:16: error: variable 'fb_ctrs' has initializer but incomplete type
     866 |         struct fb_ctr_pair fb_ctrs = { .cpu = cpu, };
         |                ^~~~~~~~~~~
>> drivers/cpufreq/cppc_cpufreq.c:866:41: error: 'struct fb_ctr_pair' has no member named 'cpu'
     866 |         struct fb_ctr_pair fb_ctrs = { .cpu = cpu, };
         |                                         ^~~
>> drivers/cpufreq/cppc_cpufreq.c:866:47: warning: excess elements in struct initializer
     866 |         struct fb_ctr_pair fb_ctrs = { .cpu = cpu, };
         |                                               ^~~
   drivers/cpufreq/cppc_cpufreq.c:866:47: note: (near initialization for 'fb_ctrs')
>> drivers/cpufreq/cppc_cpufreq.c:866:28: error: storage size of 'fb_ctrs' isn't known
     866 |         struct fb_ctr_pair fb_ctrs = { .cpu = cpu, };
         |                            ^~~~~~~
>> drivers/cpufreq/cppc_cpufreq.c:866:28: 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	
   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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