From mboxrd@z Thu Jan 1 00:00:00 1970 From: linhaifeng Subject: [PATCH] cast used->idx to volatile Date: Sat, 21 Mar 2015 16:07:17 +0800 Message-ID: <1426925237-8312-1-git-send-email-haifeng.lin@huawei.com> Mime-Version: 1.0 Content-Type: text/plain To: Return-path: List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces-VfR2kkLFssw@public.gmane.org Sender: "dev" From: Linhaifeng Same as rte_vhost_enqueue_burst we should cast used->idx to volatile before notify guest. Signed-off-by: Linhaifeng --- lib/librte_vhost/vhost_rxtx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/lib/librte_vhost/vhost_rxtx.c b/lib/librte_vhost/vhost_rxtx.c index 535c7a1..8d674d1 100644 --- a/lib/librte_vhost/vhost_rxtx.c +++ b/lib/librte_vhost/vhost_rxtx.c @@ -722,7 +722,7 @@ rte_vhost_dequeue_burst(struct virtio_net *dev, uint16_t queue_id, } rte_compiler_barrier(); - vq->used->idx += entry_success; + *(volatile uint16_t *)&vq->used->idx += entry_success; /* Kick guest if required. */ if (!(vq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT)) eventfd_write((int)vq->callfd, 1); -- 1.8.5.2.msysgit.0