linux-kernel - Re: [PATCH] riscv: kvm: define vcpu_sbi_ext

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Date:   Fri, 16 Jun 2023 13:22:10 +0100
From:   Conor Dooley <conor.dooley@...rochip.com>
To:     Ben Dooks <ben.dooks@...ethink.co.uk>
CC:     <linux-riscv@...ts.infradead.org>, <kvm-riscv@...ts.infradead.org>,
        <kvm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <palmer@...belt.com>, <anup@...infault.org>, <atishp@...shpatra.or>
Subject: Re: [PATCH] riscv: kvm: define vcpu_sbi_ext_pmu in header

Hey Ben,

On Fri, Jun 16, 2023 at 12:54:10PM +0100, Ben Dooks wrote:
> Sparse is giving a warning about vcpu_sbi_ext_pmu not being
> defined, so add a definition to the relevant header to fix
> the following:
> 
> arch/riscv/kvm/vcpu_sbi_pmu.c:81:37: warning: symbol 'vcpu_sbi_ext_pmu' was not declared. Should it be static?
> 
> Fixes: 3e5e56c60a1477 ("riscv: kvm: move extern sbi_ext declarations to a header")

You sure this is the right fixes tag? This code didn't exist when I
wrote that commit, should the fixes tag not be
	Fixes: cbddc4c4cb9e ("RISC-V: KVM: Add SBI PMU extension support")
instead?

Cheers,
Conor.

> Signed-off-by: Ben Dooks <ben.dooks@...ethink.co.uk>
> ---
>  arch/riscv/include/asm/kvm_vcpu_sbi.h | 3 +++
>  arch/riscv/kvm/vcpu_sbi.c             | 4 +---
>  2 files changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/arch/riscv/include/asm/kvm_vcpu_sbi.h b/arch/riscv/include/asm/kvm_vcpu_sbi.h
> index 4278125a38a5..b94c7e958da7 100644
> --- a/arch/riscv/include/asm/kvm_vcpu_sbi.h
> +++ b/arch/riscv/include/asm/kvm_vcpu_sbi.h
> @@ -66,4 +66,7 @@ extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_hsm;
>  extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_experimental;
>  extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_vendor;
>  
> +#ifdef CONFIG_RISCV_PMU_SBI
> +extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_pmu;
> +#endif
>  #endif /* __RISCV_KVM_VCPU_SBI_H__ */
> diff --git a/arch/riscv/kvm/vcpu_sbi.c b/arch/riscv/kvm/vcpu_sbi.c
> index e52fde504433..c973d92a0ba5 100644
> --- a/arch/riscv/kvm/vcpu_sbi.c
> +++ b/arch/riscv/kvm/vcpu_sbi.c
> @@ -20,9 +20,7 @@ static const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_v01 = {
>  };
>  #endif
>  
> -#ifdef CONFIG_RISCV_PMU_SBI
> -extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_pmu;
> -#else
> +#ifndef CONFIG_RISCV_PMU_SBI
>  static const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_pmu = {
>  	.extid_start = -1UL,
>  	.extid_end = -1UL,
> -- 
> 2.39.2
> 

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