[NET]: Use list_for_each() where applicable.

net/bluetooth/rfcomm/core.c

@@ -1794,7 +1794,7 @@ static void *rfcomm_seq_next(struct seq_file *seq, void *e, loff_t *pos)
 	if (p->next != &s->dlcs)
 		return p->next;
 
-	for (p = s->list.next; p != &session_list; p = p->next) {
+	list_for_each(p, &session_list) {
 		s = list_entry(p, struct rfcomm_session, list);
 		__list_for_each(pp, &s->dlcs) {
 			seq->private = s;

net/core/netfilter.c

@@ -101,7 +101,7 @@ int nf_register_sockopt(struct nf_sockopt_ops *reg)
 	if (down_interruptible(&nf_sockopt_mutex) != 0)
 		return -EINTR;
 
-	for (i = nf_sockopts.next; i != &nf_sockopts; i = i->next) {
+	list_for_each(i, &nf_sockopts) {
 		struct nf_sockopt_ops *ops = (struct nf_sockopt_ops *)i;
 		if (ops->pf == reg->pf
 		    && (overlap(ops->set_optmin, ops->set_optmax, 
@@ -296,7 +296,7 @@ static int nf_sockopt(struct sock *sk, int pf, int val,
 	if (down_interruptible(&nf_sockopt_mutex) != 0)
 		return -EINTR;
 
-	for (i = nf_sockopts.next; i != &nf_sockopts; i = i->next) {
+	list_for_each(i, &nf_sockopts) {
 		ops = (struct nf_sockopt_ops *)i;
 		if (ops->pf == pf) {
 			if (get) {

net/ipv4/netfilter/ip_conntrack_standalone.c

@@ -150,8 +150,7 @@ list_conntracks(char *buffer, char **start, off_t offset, int length)
 	}
 
 	/* Now iterate through expecteds. */
-	for (e = ip_conntrack_expect_list.next; 
-	     e != &ip_conntrack_expect_list; e = e->next) {
+	list_for_each(e, &ip_conntrack_expect_list) {
 		unsigned int last_len;
 		struct ip_conntrack_expect *expect
 			= (struct ip_conntrack_expect *)e;
@@ -319,7 +318,7 @@ int ip_conntrack_protocol_register(struct ip_conntrack_protocol *proto)
 	struct list_head *i;
 
 	WRITE_LOCK(&ip_conntrack_lock);
-	for (i = protocol_list.next; i != &protocol_list; i = i->next) {
+	list_for_each(i, &protocol_list) {
 		if (((struct ip_conntrack_protocol *)i)->proto
 		    == proto->proto) {
 			ret = -EBUSY;

net/ipv4/netfilter/ip_nat_standalone.c

@@ -271,7 +271,7 @@ int ip_nat_protocol_register(struct ip_nat_protocol *proto)
 	struct list_head *i;
 
 	WRITE_LOCK(&ip_nat_lock);
-	for (i = protos.next; i != &protos; i = i->next) {
+	list_for_each(i, &protos) {
 		if (((struct ip_nat_protocol *)i)->protonum
 		    == proto->protonum) {
 			ret = -EBUSY;