linux-kernel - Re: [PATCH v4 22/23] KVM: arm64: Add ioctl to partition the PMU when supported

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Message-ID: <202507160120.lx4XxDb5-lkp@intel.com>
Date: Wed, 16 Jul 2025 01:36:41 +0800
From: kernel test robot <lkp@...el.com>
To: Colton Lewis <coltonlewis@...gle.com>, kvm@...r.kernel.org
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
	Paolo Bonzini <pbonzini@...hat.com>,
	Jonathan Corbet <corbet@....net>,
	Russell King <linux@...linux.org.uk>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will@...nel.org>, Marc Zyngier <maz@...nel.org>,
	Oliver Upton <oliver.upton@...ux.dev>,
	Mingwei Zhang <mizhang@...gle.com>, Joey Gouly <joey.gouly@....com>,
	Suzuki K Poulose <suzuki.poulose@....com>,
	Zenghui Yu <yuzenghui@...wei.com>,
	Mark Rutland <mark.rutland@....com>,
	Shuah Khan <skhan@...uxfoundation.org>, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	kvmarm@...ts.linux.dev, linux-perf-users@...r.kernel.org,
	linux-kselftest@...r.kernel.org,
	Colton Lewis <coltonlewis@...gle.com>
Subject: Re: [PATCH v4 22/23] KVM: arm64: Add ioctl to partition the PMU when
 supported

Hi Colton,

kernel test robot noticed the following build warnings:

[auto build test WARNING on 79150772457f4d45e38b842d786240c36bb1f97f]

url:    https://github.com/intel-lab-lkp/linux/commits/Colton-Lewis/arm64-cpufeature-Add-cpucap-for-HPMN0/20250715-070741
base:   79150772457f4d45e38b842d786240c36bb1f97f
patch link:    https://lore.kernel.org/r/20250714225917.1396543-23-coltonlewis%40google.com
patch subject: [PATCH v4 22/23] KVM: arm64: Add ioctl to partition the PMU when supported
config: arm64-randconfig-001-20250715 (https://download.01.org/0day-ci/archive/20250716/202507160120.lx4XxDb5-lkp@intel.com/config)
compiler: clang version 16.0.6 (https://github.com/llvm/llvm-project 7cbf1a2591520c2491aa35339f227775f4d3adf6)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250716/202507160120.lx4XxDb5-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202507160120.lx4XxDb5-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from arch/arm64/kernel/asm-offsets.c:15:
   In file included from include/linux/kvm_host.h:45:
   In file included from arch/arm64/include/asm/kvm_host.h:31:
>> arch/arm64/include/asm/kvm_pmu.h:301:49: warning: omitting the parameter name in a function definition is a C2x extension [-Wc2x-extensions]
   static inline bool kvm_pmu_is_partitioned(void *)
                                                   ^
   arch/arm64/include/asm/kvm_pmu.h:306:51: warning: omitting the parameter name in a function definition is a C2x extension [-Wc2x-extensions]
   static inline u64 kvm_pmu_host_counter_mask(void *)
                                                     ^
   arch/arm64/include/asm/kvm_pmu.h:311:52: warning: omitting the parameter name in a function definition is a C2x extension [-Wc2x-extensions]
   static inline u64 kvm_pmu_guest_counter_mask(void *)
                                                      ^
   3 warnings generated.
--
   In file included from arch/arm64/kernel/asm-offsets.c:15:
   In file included from include/linux/kvm_host.h:45:
   In file included from arch/arm64/include/asm/kvm_host.h:31:
>> arch/arm64/include/asm/kvm_pmu.h:301:49: warning: omitting the parameter name in a function definition is a C2x extension [-Wc2x-extensions]
   static inline bool kvm_pmu_is_partitioned(void *)
                                                   ^
   arch/arm64/include/asm/kvm_pmu.h:306:51: warning: omitting the parameter name in a function definition is a C2x extension [-Wc2x-extensions]
   static inline u64 kvm_pmu_host_counter_mask(void *)
                                                     ^
   arch/arm64/include/asm/kvm_pmu.h:311:52: warning: omitting the parameter name in a function definition is a C2x extension [-Wc2x-extensions]
   static inline u64 kvm_pmu_guest_counter_mask(void *)
                                                      ^
   3 warnings generated.


vim +301 arch/arm64/include/asm/kvm_pmu.h

   300	
 > 301	static inline bool kvm_pmu_is_partitioned(void *)
   302	{
   303		return false;
   304	}
   305	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki