[dpdk-dev] [PATCH v1 2/4] net/mlx4: replace SMP barrier with C11 barriers

[Feifei Wang]

Replace SMP barrier with atomic thread fence.

Signed-off-by: Feifei Wang <feifei.wang2 at arm.com>
Reviewed-by: Ruifeng Wang <ruifeng.wang at arm.com>
---
 drivers/net/mlx4/mlx4_mr.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/mlx4/mlx4_mr.c b/drivers/net/mlx4/mlx4_mr.c
index cfd7d4a9c..503e8a7bb 100644
--- a/drivers/net/mlx4/mlx4_mr.c
+++ b/drivers/net/mlx4/mlx4_mr.c
@@ -951,11 +951,11 @@ mlx4_mr_mem_event_free_cb(struct rte_eth_dev *dev, const void *addr, size_t len)
 			priv->mr.dev_gen);
 
 		/* Flush local caches by propagating invalidation across cores.
-		 * rte_smp_wmb is to keep the order that dev_gen updated before
+		 * release-fence is to keep the order that dev_gen updated before
 		 * rebuilding global cache. Therefore, other core can flush their
 		 * local cache on time.
 		 */
-		rte_smp_wmb();
+		rte_atomic_thread_fence(__ATOMIC_RELEASE);
 		mr_rebuild_dev_cache(dev);
 	}
 	rte_rwlock_write_unlock(&priv->mr.rwlock);
-- 
2.25.1