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Date: Fri, 16 Mar 2007 16:06:22 +0100
From: Heiko Carstens <heiko.carstens@de.ibm.com>
To: Avi Kivity <avi@qumranet.com>
Cc: kvm-devel@lists.sourceforge.net, Andrew Morton <akpm@osdl.org>,
       linux-kernel@vger.kernel.org
Subject: Re: [kvm-devel] [PATCH 08/15] KVM: Add method to check for backwards-compatible API extensions
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> diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c
> index 747966e..376538c 100644
> --- a/drivers/kvm/kvm_main.c
> +++ b/drivers/kvm/kvm_main.c
> @@ -2416,6 +2416,12 @@ static long kvm_dev_ioctl(struct file *filp,
>  		r = 0;
>  		break;
>  	}
> +	case KVM_CHECK_EXTENSION:
> +		/*
> +		 * No extensions defined at present.
> +		 */
> +		r = 0;
> +		break;
>  	default:

What exactly is this good for?