Re: [PATCH v4 3/3] arm64: topology: Setup AMU FIE for online CPUs only

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

Hi Lifeng,

kernel test robot noticed the following build errors:

[auto build test ERROR on arm64/for-next/core]
[also build test ERROR on rafael-pm/linux-next rafael-pm/bleeding-edge arm/for-next arm/fixes kvmarm/next soc/for-next linus/master v6.17-rc1 next-20250814]
[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/Lifeng-Zheng/arm64-topology-Set-scale-freq-source-only-for-the-CPUs-that-have-not-been-set-before/20250814-153732
base:   https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-next/core
patch link:    https://lore.kernel.org/r/20250814072853.3426386-4-zhenglifeng1%40huawei.com
patch subject: [PATCH v4 3/3] arm64: topology: Setup AMU FIE for online CPUs only
config: arm64-allnoconfig (https://download.01.org/0day-ci/archive/20250815/202508151158.Hm9U6le6-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 15.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250815/202508151158.Hm9U6le6-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/202508151158.Hm9U6le6-lkp@intel.com/

All errors (new ones prefixed by >>):

   arch/arm64/kernel/topology.c: In function 'cpuhp_topology_online':
>> arch/arm64/kernel/topology.c:409:41: error: implicit declaration of function 'cpufreq_cpu_policy'; did you mean 'cpufreq_cpu_put'? [-Wimplicit-function-declaration]
     409 |         struct cpufreq_policy *policy = cpufreq_cpu_policy(cpu);
         |                                         ^~~~~~~~~~~~~~~~~~
         |                                         cpufreq_cpu_put
   arch/arm64/kernel/topology.c:409:41: error: initialization of 'struct cpufreq_policy *' from 'int' makes pointer from integer without a cast [-Wint-conversion]


vim +409 arch/arm64/kernel/topology.c

   406	
   407	static int cpuhp_topology_online(unsigned int cpu)
   408	{
 > 409		struct cpufreq_policy *policy = cpufreq_cpu_policy(cpu);
   410	
   411		/*
   412		 * If the online CPUs are not all AMU FIE CPUs or the new one is already
   413		 * an AMU FIE one, no need to set it.
   414		 */
   415		if (!policy || !cpumask_available(amu_fie_cpus) ||
   416		    !cpumask_subset(policy->cpus, amu_fie_cpus) ||
   417		    cpumask_test_cpu(cpu, amu_fie_cpus))
   418			return 0;
   419	
   420		/*
   421		 * If the new online CPU cannot pass this check, all the CPUs related to
   422		 * the same policy should be clear from amu_fie_cpus mask, otherwise they
   423		 * may use different source of the freq scale.
   424		 */
   425		if (WARN_ON(!freq_counters_valid(cpu))) {
   426			topology_clear_scale_freq_source(SCALE_FREQ_SOURCE_ARCH,
   427							 policy->related_cpus);
   428			cpumask_andnot(amu_fie_cpus, amu_fie_cpus, policy->related_cpus);
   429			return 0;
   430		}
   431	
   432		cpumask_set_cpu(cpu, amu_fie_cpus);
   433	
   434		topology_set_scale_freq_source(&amu_sfd, cpumask_of(cpu));
   435	
   436		pr_debug("CPU[%u]: counter will be used for FIE.", cpu);
   437	
   438		return 0;
   439	}
   440	

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