linux-kernel - Re: [PATCH] KVM: clean up the unused argument

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Date:   Fri, 26 Mar 2021 18:13:23 +0100
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     lihaiwei.kernel@...il.com, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org
Cc:     seanjc@...gle.com, vkuznets@...hat.com, wanpengli@...cent.com,
        jmattson@...gle.com, joro@...tes.org,
        Haiwei Li <lihaiwei@...cent.com>
Subject: Re: [PATCH] KVM: clean up the unused argument

On 13/03/21 06:10, lihaiwei.kernel@...il.com wrote:
> From: Haiwei Li <lihaiwei@...cent.com>
> 
> kvm_msr_ignored_check function never uses vcpu argument. Clean up the
> function and invokers.
> 
> Signed-off-by: Haiwei Li <lihaiwei@...cent.com>
> ---
>   arch/x86/kvm/x86.c | 9 ++++-----
>   1 file changed, 4 insertions(+), 5 deletions(-)

Queued, thanks.

Paolo

> diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
> index 012d5df..27e9ee8 100644
> --- a/arch/x86/kvm/x86.c
> +++ b/arch/x86/kvm/x86.c
> @@ -271,8 +271,7 @@ struct kvm_stats_debugfs_item debugfs_entries[] = {
>    * When called, it means the previous get/set msr reached an invalid msr.
>    * Return true if we want to ignore/silent this failed msr access.
>    */
> -static bool kvm_msr_ignored_check(struct kvm_vcpu *vcpu, u32 msr,
> -				  u64 data, bool write)
> +static bool kvm_msr_ignored_check(u32 msr, u64 data, bool write)
>   {
>   	const char *op = write ? "wrmsr" : "rdmsr";
>   
> @@ -1447,7 +1446,7 @@ static int do_get_msr_feature(struct kvm_vcpu *vcpu, unsigned index, u64 *data)
>   	if (r == KVM_MSR_RET_INVALID) {
>   		/* Unconditionally clear the output for simplicity */
>   		*data = 0;
> -		if (kvm_msr_ignored_check(vcpu, index, 0, false))
> +		if (kvm_msr_ignored_check(index, 0, false))
>   			r = 0;
>   	}
>   
> @@ -1613,7 +1612,7 @@ static int kvm_set_msr_ignored_check(struct kvm_vcpu *vcpu,
>   	int ret = __kvm_set_msr(vcpu, index, data, host_initiated);
>   
>   	if (ret == KVM_MSR_RET_INVALID)
> -		if (kvm_msr_ignored_check(vcpu, index, data, true))
> +		if (kvm_msr_ignored_check(index, data, true))
>   			ret = 0;
>   
>   	return ret;
> @@ -1651,7 +1650,7 @@ static int kvm_get_msr_ignored_check(struct kvm_vcpu *vcpu,
>   	if (ret == KVM_MSR_RET_INVALID) {
>   		/* Unconditionally clear *data for simplicity */
>   		*data = 0;
> -		if (kvm_msr_ignored_check(vcpu, index, 0, false))
> +		if (kvm_msr_ignored_check(index, 0, false))
>   			ret = 0;
>   	}
>   
>