linux-kernel - Re: [PATCH v2 05/23] KVM: arm64: Cleanup PMU includes

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Message-ID: <gsntjz529ksy.fsf@coltonlewis-kvm.c.googlers.com>
Date: Mon, 23 Jun 2025 22:04:29 +0000
From: Colton Lewis <coltonlewis@...gle.com>
To: kernel test robot <lkp@...el.com>
Cc: kvm@...r.kernel.org, oe-kbuild-all@...ts.linux.dev, pbonzini@...hat.com, 
	corbet@....net, linux@...linux.org.uk, catalin.marinas@....com, 
	will@...nel.org, maz@...nel.org, oliver.upton@...ux.dev, joey.gouly@....com, 
	suzuki.poulose@....com, yuzenghui@...wei.com, mark.rutland@....com, 
	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
Subject: Re: [PATCH v2 05/23] KVM: arm64: Cleanup PMU includes

>     drivers/perf/arm_pmuv3.c: In function 'armv8pmu_enable_event_counter':
>>> drivers/perf/arm_pmuv3.c:680:2: error: implicit declaration of  
>>> function 'kvm_set_pmu_events' [-Werror=implicit-function-declaration]
>       680 |  kvm_set_pmu_events(mask, attr);
>           |  ^~~~~~~~~~~~~~~~~~
>     drivers/perf/arm_pmuv3.c: In function 'armv8pmu_disable_event_counter':
>>> drivers/perf/arm_pmuv3.c:702:2: error: implicit declaration of  
>>> function 'kvm_clr_pmu_events' [-Werror=implicit-function-declaration]
>       702 |  kvm_clr_pmu_events(mask);
>           |  ^~~~~~~~~~~~~~~~~~
>     drivers/perf/arm_pmuv3.c: In function 'update_pmuserenr':
>>> drivers/perf/arm_pmuv3.c:757:6: error: implicit declaration of  
>>> function 'kvm_set_pmuserenr' [-Werror=implicit-function-declaration]
>       757 |  if (kvm_set_pmuserenr(val))
>           |      ^~~~~~~~~~~~~~~~~
>     cc1: some warnings being treated as errors

Looks like some dummy definitions didn't make it into a non-KVM config.

I fixed this and a similar problem I found with kvm_host_pmu_init().