Re: [PATCH 03/10] KVM: s390: factor out nullify_gisa()

[Janosch Frank <frankja@linux.ibm.com>]

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From: Janosch Frank <frankja@linux.ibm.com>
To: Michael Mueller <mimu@linux.ibm.com>, linux-s390@vger.kernel.org
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>,
 Heiko Carstens <heiko.carstens@de.ibm.com>,
 Christian Borntraeger <borntraeger@de.ibm.com>,
 David Hildenbrand <david@redhat.com>, Cornelia Huck <cohuck@redhat.com>,
 Sebastian Ott <sebott@linux.ibm.com>,
 Peter Oberparleiter <oberpar@linux.ibm.com>,
 Vasily Gorbik <gor@linux.ibm.com>, Julian Wiedmann <jwi@linux.vnet.ibm.com>,
 Tony Krowiak <akrowiak@linux.vnet.ibm.com>,
 Claudio Imbrenda <imbrenda@linux.vnet.ibm.com>,
 Halil Pasic <pasic@linux.ibm.com>, Thomas Huth <thuth@redhat.com>,
 Pierre Morel <pmorel@linux.ibm.com>
Message-ID: <938101fc-0840-7270-68c7-00cdd150efb3@linux.ibm.com>
Subject: Re: [PATCH 03/10] KVM: s390: factor out nullify_gisa()
References: <20181025123751.48809-1-mimu@linux.ibm.com>
 <20181025123751.48809-4-mimu@linux.ibm.com>
In-Reply-To: <20181025123751.48809-4-mimu@linux.ibm.com>

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On 25.10.18 14:37, Michael Mueller wrote:
> This function will be used by the GIB alert handler and during
> the GISA clear operation. Thus it gets factored out here.
>=20
> Signed-off-by: Michael Mueller <mimu@linux.ibm.com>
> Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>

Reviewed-by: Janosch Frank <frankja@linux.ibm.com>

> ---
>  arch/s390/kvm/interrupt.c | 9 +++++++--
>  1 file changed, 7 insertions(+), 2 deletions(-)
>=20
> diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c
> index 3789a9ad8dee..ce258d6b7c06 100644
> --- a/arch/s390/kvm/interrupt.c
> +++ b/arch/s390/kvm/interrupt.c
> @@ -2886,11 +2886,16 @@ int kvm_s390_get_irq_state(struct kvm_vcpu *vcp=
u, __u8 __user *buf, int len)
>  	return n;
>  }
> =20
> +static void nullify_gisa(struct kvm_s390_gisa *gisa)
> +{
> +	memset(gisa, 0, sizeof(struct kvm_s390_gisa));
> +	gisa->next_alert =3D (u32)(u64)gisa;
> +}
> +
>  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 =3D (u32)(u64)kvm->arch.gisa;
> +		nullify_gisa(kvm->arch.gisa);
>  		VM_EVENT(kvm, 3, "gisa 0x%pK cleared", kvm->arch.gisa);
>  	}
>  }
>=20



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