[dpdk-dev] [PATCH RFC v2 1/3] vhost: use SMP barriers instead of compiler ones.

[Ilya Maximets]

Since commit 4c02e453cc62 ("eal: introduce SMP memory barriers") virtio
uses architecture dependent SMP barriers. vHost should use them too.

Fixes: 4c02e453cc62 ("eal: introduce SMP memory barriers")

Signed-off-by: Ilya Maximets <i.maximets at samsung.com>
---
 lib/librte_vhost/vhost_rxtx.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/lib/librte_vhost/vhost_rxtx.c b/lib/librte_vhost/vhost_rxtx.c
index 5e7e5b1..411dd95 100644
--- a/lib/librte_vhost/vhost_rxtx.c
+++ b/lib/librte_vhost/vhost_rxtx.c
@@ -274,7 +274,7 @@ virtio_dev_rx(struct virtio_net *dev, uint16_t queue_id,
                }
        }

-       rte_compiler_barrier();
+       rte_smp_wmb();

        /* Wait until it's our turn to add our buffer to the used ring. */
        while (unlikely(vq->last_used_idx != res_base_idx))
@@ -575,7 +575,7 @@ virtio_dev_merge_rx(struct virtio_net *dev, uint16_t 
queue_id,
                entry_success = copy_from_mbuf_to_vring(dev, queue_id,
                        res_base_idx, res_cur_idx, pkts[pkt_idx]);

-               rte_compiler_barrier();
+               rte_smp_wmb();

                /*
                 * Wait until it's our turn to add our buffer
@@ -917,7 +917,7 @@ rte_vhost_dequeue_burst(struct virtio_net *dev, uint16_t 
queue_id,
                entry_success++;
        }

-       rte_compiler_barrier();
+       rte_smp_rmb();
        vq->used->idx += entry_success;
        /* Kick guest if required. */
        if (!(vq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT))
-- 
2.5.0