linux-kernel - Re: [PATCH v5 02/15] KVM: s390: coding style issue kvm_s390_gisa

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Date:   Wed, 2 Jan 2019 17:50:56 +0100
From:   Pierre Morel <pmorel@...ux.ibm.com>
To:     Michael Mueller <mimu@...ux.ibm.com>,
        KVM Mailing List <kvm@...r.kernel.org>
Cc:     Linux-S390 Mailing List <linux-s390@...r.kernel.org>,
        linux-kernel@...r.kernel.org,
        kvm390-list@...maker.boeblingen.de.ibm.com,
        Martin Schwidefsky <schwidefsky@...ibm.com>,
        Heiko Carstens <heiko.carstens@...ibm.com>,
        Christian Borntraeger <borntraeger@...ibm.com>,
        Janosch Frank <frankja@...ux.ibm.com>,
        David Hildenbrand <david@...hat.com>,
        Cornelia Huck <cohuck@...hat.com>,
        Halil Pasic <pasic@...ux.ibm.com>
Subject: Re: [PATCH v5 02/15] KVM: s390: coding style issue
 kvm_s390_gisa_init/clear()

On 19/12/2018 20:17, Michael Mueller wrote:
> The change hepls to reduce line length and
> icreases code readability.
> 
> Signed-off-by: Michael Mueller <mimu@...ux.ibm.com>
> ---
>   arch/s390/kvm/interrupt.c | 20 ++++++++++----------
>   1 file changed, 10 insertions(+), 10 deletions(-)
> 
> diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c
> index fcb55b02990e..9a3aed608914 100644
> --- a/arch/s390/kvm/interrupt.c
> +++ b/arch/s390/kvm/interrupt.c
> @@ -2886,20 +2886,20 @@ int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu, __u8 __user *buf, int len)
>   
>   void kvm_s390_gisa_clear(struct kvm *kvm)
>   {
> -	if (kvm->arch.gisa) {
> -		memset(kvm->arch.gisa, 0, sizeof(struct kvm_s390_gisa));
> -		kvm->arch.gisa->next_alert = (u32)(u64)kvm->arch.gisa;
> -		VM_EVENT(kvm, 3, "gisa 0x%pK cleared", kvm->arch.gisa);
> -	}
> +	if (!kvm->arch.gisa)
> +		return;
> +	memset(kvm->arch.gisa, 0, sizeof(struct kvm_s390_gisa));
> +	kvm->arch.gisa->next_alert = (u32)(u64)kvm->arch.gisa;
> +	VM_EVENT(kvm, 3, "gisa 0x%pK cleared", kvm->arch.gisa);
>   }
>   
>   void kvm_s390_gisa_init(struct kvm *kvm)
>   {
> -	if (css_general_characteristics.aiv) {
> -		kvm->arch.gisa = &kvm->arch.sie_page2->gisa;
> -		VM_EVENT(kvm, 3, "gisa 0x%pK initialized", kvm->arch.gisa);
> -		kvm_s390_gisa_clear(kvm);
> -	}
> +	if (!css_general_characteristics.aiv)
> +		return;
> +	kvm->arch.gisa = &kvm->arch.sie_page2->gisa;
> +	VM_EVENT(kvm, 3, "gisa 0x%pK initialized", kvm->arch.gisa);

to be annoying, shouldn't the trace be done after the clear?

> +	kvm_s390_gisa_clear(kvm);
>   }
>   
>   void kvm_s390_gisa_destroy(struct kvm *kvm)
> 

Reviewed-by: Pierre Morel<pmorel@...ux.ibm.com>


-- 
Pierre Morel
Linux/KVM/QEMU in Böblingen - Germany