Re: [PATCH v6 14/19] perf: arm_pmuv3: Handle IRQs for Partitioned PMU guest counters

Re: [PATCH v6 14/19] perf: arm_pmuv3: Handle IRQs for Partitioned PMU guest counters

[kernel test robot]

Hi Colton,

kernel test robot noticed the following build warnings:

[auto build test WARNING on 63804fed149a6750ffd28610c5c1c98cce6bd377]

url:    https://github.com/intel-lab-lkp/linux/commits/Colton-Lewis/arm64-cpufeature-Add-cpucap-for-HPMN0/20260210-064939
base:   63804fed149a6750ffd28610c5c1c98cce6bd377
patch link:    https://lore.kernel.org/r/20260209221414.2169465-15-coltonlewis%40google.com
patch subject: [PATCH v6 14/19] perf: arm_pmuv3: Handle IRQs for Partitioned PMU guest counters
config: arm64-randconfig-001-20260210 (https://download.01.org/0day-ci/archive/20260210/202602101258.VRaEHc98-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 9b8addffa70cee5b2acc5454712d9cf78ce45710)
rustc: rustc 1.88.0 (6b00bc388 2025-06-23)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260210/202602101258.VRaEHc98-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/202602101258.VRaEHc98-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from arch/arm64/kernel/asm-offsets.c:16:
   In file included from include/linux/kvm_host.h:45:
   In file included from arch/arm64/include/asm/kvm_host.h:38:
>> include/kvm/arm_pmu.h:310:52: warning: declaration of 'struct arm_pmu' will not be visible outside of this function [-Wvisibility]
     310 | static inline void kvm_pmu_handle_guest_irq(struct arm_pmu *pmu, u64 pmovsr) {}
         |                                                    ^
   include/kvm/arm_pmu.h:281:12: warning: unused function 'kvm_vcpu_read_pmuserenr' [-Wunused-function]
     281 | static u64 kvm_vcpu_read_pmuserenr(struct kvm_vcpu *vcpu)
         |            ^~~~~~~~~~~~~~~~~~~~~~~
   2 warnings generated.
--
   In file included from arch/arm64/kernel/asm-offsets.c:16:
   In file included from include/linux/kvm_host.h:45:
   In file included from arch/arm64/include/asm/kvm_host.h:38:
>> include/kvm/arm_pmu.h:310:52: warning: declaration of 'struct arm_pmu' will not be visible outside of this function [-Wvisibility]
   310 | static inline void kvm_pmu_handle_guest_irq(struct arm_pmu *pmu, u64 pmovsr) {}
   |                                                    ^
   include/kvm/arm_pmu.h:281:12: warning: unused function 'kvm_vcpu_read_pmuserenr' [-Wunused-function]
   281 | static u64 kvm_vcpu_read_pmuserenr(struct kvm_vcpu *vcpu)
   |            ^~~~~~~~~~~~~~~~~~~~~~~
   2 warnings generated.
   warning: unused variable: `args`
   --> rust/kernel/kunit.rs:19:12
   |
   19 | pub fn err(args: fmt::Arguments<'_>) {
   |            ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
   |
   = note: `#[warn(unused_variables)]` on by default


vim +310 include/kvm/arm_pmu.h

   307	
   308	static inline void kvm_pmu_host_counters_enable(void) {}
   309	static inline void kvm_pmu_host_counters_disable(void) {}
 > 310	static inline void kvm_pmu_handle_guest_irq(struct arm_pmu *pmu, u64 pmovsr) {}
   311	

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