netfilter: conntrack: don't acquire lock during seq_printf

read access doesn't need any lock here.
Signed-off-by: NFlorian Westphal <fw@strlen.de>
Signed-off-by: NPablo Neira Ayuso <pablo@netfilter.org>

net/netfilter/nf_conntrack_proto_sctp.c

@@ -191,13 +191,7 @@ static void sctp_print_tuple(struct seq_file *s,
 /* Print out the private part of the conntrack. */
 static void sctp_print_conntrack(struct seq_file *s, struct nf_conn *ct)
 {
-	enum sctp_conntrack state;
-
-	spin_lock_bh(&ct->lock);
-	state = ct->proto.sctp.state;
-	spin_unlock_bh(&ct->lock);
-
-	seq_printf(s, "%s ", sctp_conntrack_names[state]);
+	seq_printf(s, "%s ", sctp_conntrack_names[ct->proto.sctp.state]);
 }
 
 #define for_each_sctp_chunk(skb, sch, _sch, offset, dataoff, count)	\

net/netfilter/nf_conntrack_proto_tcp.c

@@ -313,13 +313,7 @@ static void tcp_print_tuple(struct seq_file *s,
 /* Print out the private part of the conntrack. */
 static void tcp_print_conntrack(struct seq_file *s, struct nf_conn *ct)
 {
-	enum tcp_conntrack state;
-
-	spin_lock_bh(&ct->lock);
-	state = ct->proto.tcp.state;
-	spin_unlock_bh(&ct->lock);
-
-	seq_printf(s, "%s ", tcp_conntrack_names[state]);
+	seq_printf(s, "%s ", tcp_conntrack_names[ct->proto.tcp.state]);
 }
 
 static unsigned int get_conntrack_index(const struct tcphdr *tcph)