From mboxrd@z Thu Jan  1 00:00:00 1970
From: Scott Wood <scottwood@freescale.com>
Subject: Re: [PATCH 17/38] KVM: PPC: BookE: Add support for vcpu->mode
Date: Tue, 14 Aug 2012 20:25:56 -0500
Message-ID: <502AFAA4.8050105@freescale.com>
References: <1344985483-7440-1-git-send-email-agraf@suse.de> <1344985483-7440-18-git-send-email-agraf@suse.de>
Mime-Version: 1.0
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: 7bit
Cc: <kvm-ppc@vger.kernel.org>, KVM list <kvm@vger.kernel.org>
To: Alexander Graf <agraf@suse.de>
Return-path: <kvm-ppc-owner@vger.kernel.org>
In-Reply-To: <1344985483-7440-18-git-send-email-agraf@suse.de>
Sender: kvm-ppc-owner@vger.kernel.org
List-Id: kvm.vger.kernel.org

On 08/14/2012 06:04 PM, Alexander Graf wrote:
> +		/* Going into guest context! Yay! */
> +		vcpu->mode = IN_GUEST_MODE;
> +		smp_wmb();
> +
>  		break;
>  	}

What is the wmb protecting against here?

-Scott