[android-common:android12-5.10-2024-05 4177/30000] arch/arm64/kvm/perf.c:58:43: error: implicit declaration of function 'perf_num_counters'; did you mean 'dec_mm_counter'?

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

Hi Marc,

FYI, the error/warning still remains.

tree:   https://android.googlesource.com/kernel/common android12-5.10-2024-05
head:   591df1b051947b5739a144969afb0fbfb2fc611d
commit: 13dbdc0759fd4b89417f64d399ffa6a86fdc7caf [4177/30000] FROMGIT: KVM: arm64: Turn kvm_arm_support_pmu_v3() into a static key
config: arm64-randconfig-003-20240904 (https://download.01.org/0day-ci/archive/20240904/202409040753.jFltpYsd-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 14.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240904/202409040753.jFltpYsd-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/202409040753.jFltpYsd-lkp@intel.com/

All errors (new ones prefixed by >>):

   arch/arm64/kvm/perf.c: In function 'kvm_perf_init':
>> arch/arm64/kvm/perf.c:58:43: error: implicit declaration of function 'perf_num_counters'; did you mean 'dec_mm_counter'? [-Werror=implicit-function-declaration]
      58 |         if (IS_ENABLED(CONFIG_ARM_PMU) && perf_num_counters() > 0)
         |                                           ^~~~~~~~~~~~~~~~~
         |                                           dec_mm_counter
   cc1: some warnings being treated as errors

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for SND_VMASTER
   Depends on [n]: SOUND [=n] && !UML && SND [=n]
   Selected by [y]:
   - GKI_HIDDEN_SND_CONFIGS [=y]
   WARNING: unmet direct dependencies detected for SND_PCM_IEC958
   Depends on [n]: SOUND [=n] && !UML && SND [=n]
   Selected by [y]:
   - GKI_HIDDEN_SND_SOC_CONFIGS [=y]
   WARNING: unmet direct dependencies detected for SND_JACK
   Depends on [n]: SOUND [=n] && !UML && SND [=n]
   Selected by [y]:
   - GKI_HIDDEN_SND_CONFIGS [=y]
   WARNING: unmet direct dependencies detected for SND_JACK_INPUT_DEV
   Depends on [n]: SOUND [=n] && !UML && SND [=n] && SND_JACK [=y]
   Selected by [y]:
   - GKI_HIDDEN_SND_CONFIGS [=y]
   WARNING: unmet direct dependencies detected for SND_PCM_ELD
   Depends on [n]: SOUND [=n] && !UML && SND [=n]
   Selected by [y]:
   - GKI_HIDDEN_SND_CONFIGS [=y]
   WARNING: unmet direct dependencies detected for HVC_DRIVER
   Depends on [n]: TTY [=n]
   Selected by [y]:
   - GKI_HIDDEN_VIRTUAL_CONFIGS [=y]


vim +58 arch/arm64/kvm/perf.c

    50	
    51	int kvm_perf_init(void)
    52	{
    53		/*
    54		 * Check if HW_PERF_EVENTS are supported by checking the number of
    55		 * hardware performance counters. This could ensure the presence of
    56		 * a physical PMU and CONFIG_PERF_EVENT is selected.
    57		 */
  > 58		if (IS_ENABLED(CONFIG_ARM_PMU) && perf_num_counters() > 0)
    59			static_branch_enable(&kvm_arm_pmu_available);
    60	
    61		return perf_register_guest_info_callbacks(&kvm_guest_cbs);
    62	}
    63	

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