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.
>
> Signed-off-by: Michael Mueller <mimu@xxxxxxxxxxxxx>
> Reviewed-by: Pierre Morel <pmorel@xxxxxxxxxxxxx>
Reviewed-by: Janosch Frank <frankja@xxxxxxxxxxxxx>
> ---
> arch/s390/kvm/interrupt.c | 9 +++++++--
> 1 file changed, 7 insertions(+), 2 deletions(-)
>
> 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 *vcpu, __u8 __user *buf, int len)
> return n;
> }
>
> +static void nullify_gisa(struct kvm_s390_gisa *gisa)
> +{
> + memset(gisa, 0, sizeof(struct kvm_s390_gisa));
> + gisa->next_alert = (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 = (u32)(u64)kvm->arch.gisa;
> + nullify_gisa(kvm->arch.gisa);
> VM_EVENT(kvm, 3, "gisa 0x%pK cleared", kvm->arch.gisa);
> }
> }
>
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