From mboxrd@z Thu Jan  1 00:00:00 1970
From: david.vrabel@citrix.com (David Vrabel)
Date: Mon, 11 Jan 2016 11:12:06 +0000
Subject: [PATCH v3 39/41] xen/events: use virt_xxx barriers
In-Reply-To: <1452426622-4471-40-git-send-email-mst@redhat.com>
References: <1452426622-4471-1-git-send-email-mst@redhat.com>
 <1452426622-4471-40-git-send-email-mst@redhat.com>
Message-ID: <56938E06.9050702@citrix.com>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

On 10/01/16 14:21, Michael S. Tsirkin wrote:
> drivers/xen/events/events_fifo.c uses rmb() to communicate with the
> other side.
> 
> For guests compiled with CONFIG_SMP, smp_rmb would be sufficient, so
> rmb() here is only needed if a non-SMP guest runs on an SMP host.
> 
> Switch to the virt_rmb barrier which serves this exact purpose.
> 
> Pull in asm/barrier.h here to make sure the file is self-contained.
> 
> Suggested-by: David Vrabel <david.vrabel@citrix.com>
> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

Acked-by: David Vrabel <david.vrabel@citrix.com>

David