1 files changed, 5 insertions, 0 deletions

diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c
index b6ef9a04de06..a75864d93142 100644
--- a/net/sched/cls_api.c
+++ b/net/sched/cls_api.c
@@ -81,6 +81,11 @@ int unregister_tcf_proto_ops(struct tcf_proto_ops *ops)
         struct tcf_proto_ops *t;
         int rc = -ENOENT;
 
+        /* Wait for outstanding call_rcu()s, if any, from a
+         * tcf_proto_ops's destroy() handler.
+         */
+        rcu_barrier();
+
         write_lock(&cls_mod_lock);
         list_for_each_entry(t, &tcf_proto_base, head) {
                 if (t == ops) {