[dpdk-dev] [PATCH v4] 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 | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/lib/librte_vhost/vhost_rxtx.c b/lib/librte_vhost/vhost_rxtx.c
index b4da665..859c669 100644
--- a/lib/librte_vhost/vhost_rxtx.c
+++ b/lib/librte_vhost/vhost_rxtx.c
@@ -315,7 +315,7 @@ virtio_dev_rx(struct virtio_net *dev, uint16_t queue_id,
                        rte_prefetch0(&vq->desc[desc_indexes[i+1]]);
        }

-       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_start_idx))
@@ -565,7 +565,7 @@ virtio_dev_merge_rx(struct virtio_net *dev, uint16_t 
queue_id,

                nr_used = copy_mbuf_to_desc_mergeable(dev, vq, start, end,
                                                      pkts[pkt_idx]);
-               rte_compiler_barrier();
+               rte_smp_wmb();

                /*
                 * Wait until it's our turn to add our buffer
@@ -923,7 +923,8 @@ rte_vhost_dequeue_burst(struct virtio_net *dev, uint16_t 
queue_id,
                                sizeof(vq->used->ring[used_idx]));
        }

-       rte_compiler_barrier();
+       rte_smp_wmb();
+       rte_smp_rmb();
        vq->used->idx += i;
        vhost_log_used_vring(dev, vq, offsetof(struct vring_used, idx),
                        sizeof(vq->used->idx));
-- 
2.5.0