linux-kernel - Re: [PATCH v3] KVM: remove #ifndef CONFIG_S390 around kvm_vcpu_wake

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Date:   Wed, 3 May 2017 19:04:24 +0200
From:   Cornelia Huck <cornelia.huck@...ibm.com>
To:     Radim Krčmář <rkrcmar@...hat.com>
Cc:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        Christoffer Dall <cdall@...aro.org>,
        Andrew Jones <drjones@...hat.com>,
        Marc Zyngier <marc.zyngier@....com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Christian Borntraeger <borntraeger@...ibm.com>,
        James Hogan <james.hogan@...tec.com>,
        Paul Mackerras <paulus@...abs.org>
Subject: Re: [PATCH v3] KVM: remove #ifndef CONFIG_S390 around
 kvm_vcpu_wake_up

On Wed,  3 May 2017 18:16:34 +0200
Radim Krčmář <rkrcmar@...hat.com> wrote:

> The #ifndef was protecting a missing halt_wakeup stat, but that is no
> longer necessary.  The #ifndef around kvm_vcpu_kick is still necessary
> as s390 does not export smp_send_reschedule.

It feels like smp_send_reschedule() should be exported everywhere if
kvm wants to use it... but this certainly works as well.

Acked-by: Cornelia Huck <cornelia.huck@...ibm.com>

> 
> Signed-off-by: Radim Krčmář <rkrcmar@...hat.com>
> ---
>  v3: kept kvm_vcpu_kick() under the #ifndef and compile tested with kvm
>      configured as module too ...
> 
>  virt/kvm/kvm_main.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
> index 357e67cba32e..7112889e5e1a 100644
> --- a/virt/kvm/kvm_main.c
> +++ b/virt/kvm/kvm_main.c
> @@ -2195,7 +2195,6 @@ void kvm_vcpu_block(struct kvm_vcpu *vcpu)
>  }
>  EXPORT_SYMBOL_GPL(kvm_vcpu_block);
> 
> -#ifndef CONFIG_S390
>  void kvm_vcpu_wake_up(struct kvm_vcpu *vcpu)
>  {
>  	struct swait_queue_head *wqp;
> @@ -2209,6 +2208,7 @@ void kvm_vcpu_wake_up(struct kvm_vcpu *vcpu)
>  }
>  EXPORT_SYMBOL_GPL(kvm_vcpu_wake_up);
> 
> +#ifndef CONFIG_S390
>  /*
>   * Kick a sleeping VCPU, or a guest VCPU in guest mode, into host kernel mode.
>   */