X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=lib%2Flibrte_ring%2Frte_ring.h;h=fc433b050b5cfbfc97cf39de521a4a58e6088368;hb=6e7cbd63706f3435b9d9a2057a37db1da01db9a7;hp=5e9b3b7b4c4aa9f80a5606ad9bd4a4219183c187;hpb=055c52583a2794da8ba1e85a48cce3832372b12f;p=deb_dpdk.git

diff --git a/lib/librte_ring/rte_ring.h b/lib/librte_ring/rte_ring.h
index 5e9b3b7b..fc433b05 100644
--- a/lib/librte_ring/rte_ring.h
+++ b/lib/librte_ring/rte_ring.h
@@ -96,6 +96,7 @@ extern "C" {
 #include <sys/queue.h>
 #include <errno.h>
 #include <rte_common.h>
+#include <rte_config.h>
 #include <rte_memory.h>
 #include <rte_lcore.h>
 #include <rte_atomic.h>
@@ -409,6 +410,12 @@ __rte_ring_move_prod_head(struct rte_ring *r, int is_sp,
 		n = max;
 
 		*old_head = r->prod.head;
+
+		/* add rmb barrier to avoid load/load reorder in weak
+		 * memory model. It is noop on x86
+		 */
+		rte_smp_rmb();
+
 		const uint32_t cons_tail = r->cons.tail;
 		/*
 		 *  The subtraction is done between two unsigned 32bits value
@@ -517,6 +524,12 @@ __rte_ring_move_cons_head(struct rte_ring *r, int is_sc,
 		n = max;
 
 		*old_head = r->cons.head;
+
+		/* add rmb barrier to avoid load/load reorder in weak
+		 * memory model. It is noop on x86
+		 */
+		rte_smp_rmb();
+
 		const uint32_t 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
@@ -569,7 +582,7 @@ __rte_ring_do_dequeue(struct rte_ring *r, void **obj_table,
 	uint32_t cons_head, cons_next;
 	uint32_t entries;
 
-	n = __rte_ring_move_cons_head(r, is_sc, n, behavior,
+	n = __rte_ring_move_cons_head(r, (int)is_sc, n, behavior,
 			&cons_head, &cons_next, &entries);
 	if (n == 0)
 		goto end;