X-Git-Url: https://gerrit.fd.io/r/gitweb?p=deb_dpdk.git;a=blobdiff_plain;f=lib%2Flibrte_ring%2Frte_ring.h;fp=lib%2Flibrte_ring%2Frte_ring.h;h=c1b311a8b23b32f9f2e2c901fc4f903b0191ef25;hp=32b8c8d2c91f73f4e90702db6c3f8868b32cb52b;hb=47d9763a1dd3103d732da9eec350cfc1cd784717;hpb=fdd2322bb45e83d3fd96b06ea32a4afbb60bcb6f

diff --git a/lib/librte_ring/rte_ring.h b/lib/librte_ring/rte_ring.h
index 32b8c8d2..c1b311a8 100644
--- a/lib/librte_ring/rte_ring.h
+++ b/lib/librte_ring/rte_ring.h
@@ -450,6 +450,12 @@ __rte_ring_mp_do_enqueue(struct rte_ring *r, void * const *obj_table,
 		n = max;
 
 		prod_head = r->prod.head;
+
+		/* add rmb barrier to avoid load/load reorder in weak
+		 * memory model. It is noop on x86
+		 */
+		rte_smp_rmb();
+
 		cons_tail = r->cons.tail;
 		/* The subtraction is done between two unsigned 32bits value
 		 * (the result is always modulo 32 bits even if we have
@@ -642,6 +648,12 @@ __rte_ring_mc_do_dequeue(struct rte_ring *r, void **obj_table,
 		n = max;
 
 		cons_head = r->cons.head;
+
+		/* add rmb barrier to avoid load/load reorder in weak
+		 * memory model. It is noop on x86
+		 */
+		rte_smp_rmb();
+
 		prod_tail = r->prod.tail;
 		/* The subtraction is done between two unsigned 32bits value
 		 * (the result is always modulo 32 bits even if we have