Merge branch 'master' into tk71

[mv-sheeva.git] / net / netfilter / nf_conntrack_proto.c

diff --git a/net/netfilter/nf_conntrack_proto.c b/net/netfilter/nf_conntrack_proto.c
index 5886ba1d52a0c353a2538313c717328cacfdcac3..dc7bb74110df22818b42222450f0141068b79b6d 100644 (file)
--- a/net/netfilter/nf_conntrack_proto.c
+++ b/net/netfilter/nf_conntrack_proto.c
@@ -28,8 +28,8 @@
 #include <net/netfilter/nf_conntrack_l4proto.h>
 #include <net/netfilter/nf_conntrack_core.h>
 
-static struct nf_conntrack_l4proto **nf_ct_protos[PF_MAX] __read_mostly;
-struct nf_conntrack_l3proto *nf_ct_l3protos[AF_MAX] __read_mostly;
+static struct nf_conntrack_l4proto __rcu **nf_ct_protos[PF_MAX] __read_mostly;
+struct nf_conntrack_l3proto __rcu *nf_ct_l3protos[AF_MAX] __read_mostly;
 EXPORT_SYMBOL_GPL(nf_ct_l3protos);
 
 static DEFINE_MUTEX(nf_ct_proto_mutex);
@@ -292,6 +292,12 @@ int nf_conntrack_l4proto_register(struct nf_conntrack_l4proto *l4proto)
 
                for (i = 0; i < MAX_NF_CT_PROTO; i++)
                        proto_array[i] = &nf_conntrack_l4proto_generic;
+
+               /* Before making proto_array visible to lockless readers,
+                * we must make sure its content is committed to memory.
+                */
+               smp_wmb();
+
                nf_ct_protos[l4proto->l3proto] = proto_array;
        } else if (nf_ct_protos[l4proto->l3proto][l4proto->l4proto] !=
                                        &nf_conntrack_l4proto_generic) {