hlist: drop the node parameter from iterators

I'm not sure why, but the hlist for each entry iterators were conceived

        list_for_each_entry(pos, head, member)

The hlist ones were greedy and wanted an extra parameter:

        hlist_for_each_entry(tpos, pos, head, member)

Why did they need an extra pos parameter? I'm not quite sure. Not only
they don't really need it, it also prevents the iterator from looking
exactly like the list iterator, which is unfortunate.

Besides the semantic patch, there was some manual work required:

 - Fix up the actual hlist iterators in linux/list.h
 - Fix up the declaration of other iterators based on the hlist ones.
 - A very small amount of places were using the 'node' parameter, this
 was modified to use 'obj->member' instead.
 - Coccinelle didn't handle the hlist_for_each_entry_safe iterator
 properly, so those had to be fixed up manually.

The semantic patch which is mostly the work of Peter Senna Tschudin is here:

@@
iterator name hlist_for_each_entry, hlist_for_each_entry_continue, hlist_for_each_entry_from, hlist_for_each_entry_rcu, hlist_for_each_entry_rcu_bh, hlist_for_each_entry_continue_rcu_bh, for_each_busy_worker, ax25_uid_for_each, ax25_for_each, inet_bind_bucket_for_each, sctp_for_each_hentry, sk_for_each, sk_for_each_rcu, sk_for_each_from, sk_for_each_safe, sk_for_each_bound, hlist_for_each_entry_safe, hlist_for_each_entry_continue_rcu, nr_neigh_for_each, nr_neigh_for_each_safe, nr_node_for_each, nr_node_for_each_safe, for_each_gfn_indirect_valid_sp, for_each_gfn_sp, for_each_host;

type T;
expression a,c,d,e;
identifier b;
statement S;
@@

-T b;
    <+... when != b
(
hlist_for_each_entry(a,
- b,
c, d) S
|
hlist_for_each_entry_continue(a,
- b,
c) S
|
hlist_for_each_entry_from(a,
- b,
c) S
|
hlist_for_each_entry_rcu(a,
- b,
c, d) S
|
hlist_for_each_entry_rcu_bh(a,
- b,
c, d) S
|
hlist_for_each_entry_continue_rcu_bh(a,
- b,
c) S
|
for_each_busy_worker(a, c,
- b,
d) S
|
ax25_uid_for_each(a,
- b,
c) S
|
ax25_for_each(a,
- b,
c) S
|
inet_bind_bucket_for_each(a,
- b,
c) S
|
sctp_for_each_hentry(a,
- b,
c) S
|
sk_for_each(a,
- b,
c) S
|
sk_for_each_rcu(a,
- b,
c) S
|
sk_for_each_from
-(a, b)
+(a)
S
+ sk_for_each_from(a) S
|
sk_for_each_safe(a,
- b,
c, d) S
|
sk_for_each_bound(a,
- b,
c) S
|
hlist_for_each_entry_safe(a,
- b,
c, d, e) S
|
hlist_for_each_entry_continue_rcu(a,
- b,
c) S
|
nr_neigh_for_each(a,
- b,
c) S
|
nr_neigh_for_each_safe(a,
- b,
c, d) S
|
nr_node_for_each(a,
- b,
c) S
|
nr_node_for_each_safe(a,
- b,
c, d) S
|
- for_each_gfn_sp(a, c, d, b) S
+ for_each_gfn_sp(a, c, d) S
|
- for_each_gfn_indirect_valid_sp(a, c, d, b) S
+ for_each_gfn_indirect_valid_sp(a, c, d) S
|
for_each_host(a,
- b,
c) S
|
for_each_host_safe(a,
- b,
c, d) S
|
for_each_mesh_entry(a,
- b,
c, d) S
)
    ...+>

[akpm@linux-foundation.org: drop bogus change from net/ipv4/raw.c]
[akpm@linux-foundation.org: drop bogus hunk from net/ipv6/raw.c]
[akpm@linux-foundation.org: checkpatch fixes]
[akpm@linux-foundation.org: fix warnings]
[akpm@linux-foudnation.org: redo intrusive kvm changes]
Tested-by: Peter Senna Tschudin <peter.senna@gmail.com>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 files changed, 55 insertions, 82 deletions

diff --git a/net/netfilter/ipvs/ip_vs_conn.c b/net/netfilter/ipvs/ip_vs_conn.c
index 9f00db7e03f..704e514e02a 100644
--- a/net/netfilter/ipvs/ip_vs_conn.c
+++ b/net/netfilter/ipvs/ip_vs_conn.c
@@ -259,13 +259,12 @@ __ip_vs_conn_in_get(const struct ip_vs_conn_param *p)
 {
 	unsigned int hash;
 	struct ip_vs_conn *cp;
-	struct hlist_node *n;
 
 	hash = ip_vs_conn_hashkey_param(p, false);
 
 	ct_read_lock(hash);
 
-	hlist_for_each_entry(cp, n, &ip_vs_conn_tab[hash], c_list) {
+	hlist_for_each_entry(cp, &ip_vs_conn_tab[hash], c_list) {
 		if (cp->af == p->af &&
 		    p->cport == cp->cport && p->vport == cp->vport &&
 		    ip_vs_addr_equal(p->af, p->caddr, &cp->caddr) &&
@@ -344,13 +343,12 @@ struct ip_vs_conn *ip_vs_ct_in_get(const struct ip_vs_conn_param *p)
 {
 	unsigned int hash;
 	struct ip_vs_conn *cp;
-	struct hlist_node *n;
 
 	hash = ip_vs_conn_hashkey_param(p, false);
 
 	ct_read_lock(hash);
 
-	hlist_for_each_entry(cp, n, &ip_vs_conn_tab[hash], c_list) {
+	hlist_for_each_entry(cp, &ip_vs_conn_tab[hash], c_list) {
 		if (!ip_vs_conn_net_eq(cp, p->net))
 			continue;
 		if (p->pe_data && p->pe->ct_match) {
@@ -394,7 +392,6 @@ struct ip_vs_conn *ip_vs_conn_out_get(const struct ip_vs_conn_param *p)
 {
 	unsigned int hash;
 	struct ip_vs_conn *cp, *ret=NULL;
-	struct hlist_node *n;
 
 	/*
 	 *	Check for "full" addressed entries
@@ -403,7 +400,7 @@ struct ip_vs_conn *ip_vs_conn_out_get(const struct ip_vs_conn_param *p)
 
 	ct_read_lock(hash);
 
-	hlist_for_each_entry(cp, n, &ip_vs_conn_tab[hash], c_list) {
+	hlist_for_each_entry(cp, &ip_vs_conn_tab[hash], c_list) {
 		if (cp->af == p->af &&
 		    p->vport == cp->cport && p->cport == cp->dport &&
 		    ip_vs_addr_equal(p->af, p->vaddr, &cp->caddr) &&
@@ -953,11 +950,10 @@ static void *ip_vs_conn_array(struct seq_file *seq, loff_t pos)
 	int idx;
 	struct ip_vs_conn *cp;
 	struct ip_vs_iter_state *iter = seq->private;
-	struct hlist_node *n;
 
 	for (idx = 0; idx < ip_vs_conn_tab_size; idx++) {
 		ct_read_lock_bh(idx);
-		hlist_for_each_entry(cp, n, &ip_vs_conn_tab[idx], c_list) {
+		hlist_for_each_entry(cp, &ip_vs_conn_tab[idx], c_list) {
 			if (pos-- == 0) {
 				iter->l = &ip_vs_conn_tab[idx];
 				return cp;
@@ -981,7 +977,6 @@ static void *ip_vs_conn_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 {
 	struct ip_vs_conn *cp = v;
 	struct ip_vs_iter_state *iter = seq->private;
-	struct hlist_node *e;
 	struct hlist_head *l = iter->l;
 	int idx;
 
@@ -990,15 +985,15 @@ static void *ip_vs_conn_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 		return ip_vs_conn_array(seq, 0);
 
 	/* more on same hash chain? */
-	if ((e = cp->c_list.next))
-		return hlist_entry(e, struct ip_vs_conn, c_list);
+	if (cp->c_list.next)
+		return hlist_entry(cp->c_list.next, struct ip_vs_conn, c_list);
 
 	idx = l - ip_vs_conn_tab;
 	ct_read_unlock_bh(idx);
 
 	while (++idx < ip_vs_conn_tab_size) {
 		ct_read_lock_bh(idx);
-		hlist_for_each_entry(cp, e, &ip_vs_conn_tab[idx], c_list) {
+		hlist_for_each_entry(cp, &ip_vs_conn_tab[idx], c_list) {
 			iter->l = &ip_vs_conn_tab[idx];
 			return cp;
 		}
@@ -1200,14 +1195,13 @@ void ip_vs_random_dropentry(struct net *net)
 	 */
 	for (idx = 0; idx < (ip_vs_conn_tab_size>>5); idx++) {
 		unsigned int hash = net_random() & ip_vs_conn_tab_mask;
-		struct hlist_node *n;
 
 		/*
 		 *  Lock is actually needed in this loop.
 		 */
 		ct_write_lock_bh(hash);
 
-		hlist_for_each_entry(cp, n, &ip_vs_conn_tab[hash], c_list) {
+		hlist_for_each_entry(cp, &ip_vs_conn_tab[hash], c_list) {
 			if (cp->flags & IP_VS_CONN_F_TEMPLATE)
 				/* connection template */
 				continue;
@@ -1255,14 +1249,12 @@ static void ip_vs_conn_flush(struct net *net)
 
 flush_again:
 	for (idx = 0; idx < ip_vs_conn_tab_size; idx++) {
-		struct hlist_node *n;
-
 		/*
 		 *  Lock is actually needed in this loop.
 		 */
 		ct_write_lock_bh(idx);
 
-		hlist_for_each_entry(cp, n, &ip_vs_conn_tab[idx], c_list) {
+		hlist_for_each_entry(cp, &ip_vs_conn_tab[idx], c_list) {
 			if (!ip_vs_conn_net_eq(cp, net))
 				continue;
 			IP_VS_DBG(4, "del connection\n");
diff --git a/net/netfilter/nf_conntrack_expect.c b/net/netfilter/nf_conntrack_expect.c
index 3921e5bc123..8c10e3db3d9 100644
--- a/net/netfilter/nf_conntrack_expect.c
+++ b/net/netfilter/nf_conntrack_expect.c
@@ -90,14 +90,13 @@ __nf_ct_expect_find(struct net *net, u16 zone,
 		    const struct nf_conntrack_tuple *tuple)
 {
 	struct nf_conntrack_expect *i;
-	struct hlist_node *n;
 	unsigned int h;
 
 	if (!net->ct.expect_count)
 		return NULL;
 
 	h = nf_ct_expect_dst_hash(tuple);
-	hlist_for_each_entry_rcu(i, n, &net->ct.expect_hash[h], hnode) {
+	hlist_for_each_entry_rcu(i, &net->ct.expect_hash[h], hnode) {
 		if (nf_ct_tuple_mask_cmp(tuple, &i->tuple, &i->mask) &&
 		    nf_ct_zone(i->master) == zone)
 			return i;
@@ -130,14 +129,13 @@ nf_ct_find_expectation(struct net *net, u16 zone,
 		       const struct nf_conntrack_tuple *tuple)
 {
 	struct nf_conntrack_expect *i, *exp = NULL;
-	struct hlist_node *n;
 	unsigned int h;
 
 	if (!net->ct.expect_count)
 		return NULL;
 
 	h = nf_ct_expect_dst_hash(tuple);
-	hlist_for_each_entry(i, n, &net->ct.expect_hash[h], hnode) {
+	hlist_for_each_entry(i, &net->ct.expect_hash[h], hnode) {
 		if (!(i->flags & NF_CT_EXPECT_INACTIVE) &&
 		    nf_ct_tuple_mask_cmp(tuple, &i->tuple, &i->mask) &&
 		    nf_ct_zone(i->master) == zone) {
@@ -172,13 +170,13 @@ void nf_ct_remove_expectations(struct nf_conn *ct)
 {
 	struct nf_conn_help *help = nfct_help(ct);
 	struct nf_conntrack_expect *exp;
-	struct hlist_node *n, *next;
+	struct hlist_node *next;
 
 	/* Optimization: most connection never expect any others. */
 	if (!help)
 		return;
 
-	hlist_for_each_entry_safe(exp, n, next, &help->expectations, lnode) {
+	hlist_for_each_entry_safe(exp, next, &help->expectations, lnode) {
 		if (del_timer(&exp->timeout)) {
 			nf_ct_unlink_expect(exp);
 			nf_ct_expect_put(exp);
@@ -348,9 +346,8 @@ static void evict_oldest_expect(struct nf_conn *master,
 {
 	struct nf_conn_help *master_help = nfct_help(master);
 	struct nf_conntrack_expect *exp, *last = NULL;
-	struct hlist_node *n;
 
-	hlist_for_each_entry(exp, n, &master_help->expectations, lnode) {
+	hlist_for_each_entry(exp, &master_help->expectations, lnode) {
 		if (exp->class == new->class)
 			last = exp;
 	}
@@ -369,7 +366,7 @@ static inline int __nf_ct_expect_check(struct nf_conntrack_expect *expect)
 	struct nf_conn_help *master_help = nfct_help(master);
 	struct nf_conntrack_helper *helper;
 	struct net *net = nf_ct_exp_net(expect);
-	struct hlist_node *n, *next;
+	struct hlist_node *next;
 	unsigned int h;
 	int ret = 1;
 
@@ -378,7 +375,7 @@ static inline int __nf_ct_expect_check(struct nf_conntrack_expect *expect)
 		goto out;
 	}
 	h = nf_ct_expect_dst_hash(&expect->tuple);
-	hlist_for_each_entry_safe(i, n, next, &net->ct.expect_hash[h], hnode) {
+	hlist_for_each_entry_safe(i, next, &net->ct.expect_hash[h], hnode) {
 		if (expect_matches(i, expect)) {
 			if (del_timer(&i->timeout)) {
 				nf_ct_unlink_expect(i);
diff --git a/net/netfilter/nf_conntrack_helper.c b/net/netfilter/nf_conntrack_helper.c
index 013cdf69fe2..a9740bd6fe5 100644
--- a/net/netfilter/nf_conntrack_helper.c
+++ b/net/netfilter/nf_conntrack_helper.c
@@ -116,14 +116,13 @@ __nf_ct_helper_find(const struct nf_conntrack_tuple *tuple)
 {
 	struct nf_conntrack_helper *helper;
 	struct nf_conntrack_tuple_mask mask = { .src.u.all = htons(0xFFFF) };
-	struct hlist_node *n;
 	unsigned int h;
 
 	if (!nf_ct_helper_count)
 		return NULL;
 
 	h = helper_hash(tuple);
-	hlist_for_each_entry_rcu(helper, n, &nf_ct_helper_hash[h], hnode) {
+	hlist_for_each_entry_rcu(helper, &nf_ct_helper_hash[h], hnode) {
 		if (nf_ct_tuple_src_mask_cmp(tuple, &helper->tuple, &mask))
 			return helper;
 	}
@@ -134,11 +133,10 @@ struct nf_conntrack_helper *
 __nf_conntrack_helper_find(const char *name, u16 l3num, u8 protonum)
 {
 	struct nf_conntrack_helper *h;
-	struct hlist_node *n;
 	unsigned int i;
 
 	for (i = 0; i < nf_ct_helper_hsize; i++) {
-		hlist_for_each_entry_rcu(h, n, &nf_ct_helper_hash[i], hnode) {
+		hlist_for_each_entry_rcu(h, &nf_ct_helper_hash[i], hnode) {
 			if (!strcmp(h->name, name) &&
 			    h->tuple.src.l3num == l3num &&
 			    h->tuple.dst.protonum == protonum)
@@ -357,7 +355,6 @@ int nf_conntrack_helper_register(struct nf_conntrack_helper *me)
 {
 	int ret = 0;
 	struct nf_conntrack_helper *cur;
-	struct hlist_node *n;
 	unsigned int h = helper_hash(&me->tuple);
 
 	BUG_ON(me->expect_policy == NULL);
@@ -365,7 +362,7 @@ int nf_conntrack_helper_register(struct nf_conntrack_helper *me)
 	BUG_ON(strlen(me->name) > NF_CT_HELPER_NAME_LEN - 1);
 
 	mutex_lock(&nf_ct_helper_mutex);
-	hlist_for_each_entry(cur, n, &nf_ct_helper_hash[h], hnode) {
+	hlist_for_each_entry(cur, &nf_ct_helper_hash[h], hnode) {
 		if (strncmp(cur->name, me->name, NF_CT_HELPER_NAME_LEN) == 0 &&
 		    cur->tuple.src.l3num == me->tuple.src.l3num &&
 		    cur->tuple.dst.protonum == me->tuple.dst.protonum) {
@@ -386,13 +383,13 @@ static void __nf_conntrack_helper_unregister(struct nf_conntrack_helper *me,
 {
 	struct nf_conntrack_tuple_hash *h;
 	struct nf_conntrack_expect *exp;
-	const struct hlist_node *n, *next;
+	const struct hlist_node *next;
 	const struct hlist_nulls_node *nn;
 	unsigned int i;
 
 	/* Get rid of expectations */
 	for (i = 0; i < nf_ct_expect_hsize; i++) {
-		hlist_for_each_entry_safe(exp, n, next,
+		hlist_for_each_entry_safe(exp, next,
 					  &net->ct.expect_hash[i], hnode) {
 			struct nf_conn_help *help = nfct_help(exp->master);
 			if ((rcu_dereference_protected(
diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c
index 5d60e04f967..9904b15f600 100644
--- a/net/netfilter/nf_conntrack_netlink.c
+++ b/net/netfilter/nf_conntrack_netlink.c
@@ -2370,14 +2370,13 @@ ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
 	struct net *net = sock_net(skb->sk);
 	struct nf_conntrack_expect *exp, *last;
 	struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
-	struct hlist_node *n;
 	u_int8_t l3proto = nfmsg->nfgen_family;
 
 	rcu_read_lock();
 	last = (struct nf_conntrack_expect *)cb->args[1];
 	for (; cb->args[0] < nf_ct_expect_hsize; cb->args[0]++) {
 restart:
-		hlist_for_each_entry(exp, n, &net->ct.expect_hash[cb->args[0]],
+		hlist_for_each_entry(exp, &net->ct.expect_hash[cb->args[0]],
 				     hnode) {
 			if (l3proto && exp->tuple.src.l3num != l3proto)
 				continue;
@@ -2510,7 +2509,7 @@ ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb,
 	struct nf_conntrack_expect *exp;
 	struct nf_conntrack_tuple tuple;
 	struct nfgenmsg *nfmsg = nlmsg_data(nlh);
-	struct hlist_node *n, *next;
+	struct hlist_node *next;
 	u_int8_t u3 = nfmsg->nfgen_family;
 	unsigned int i;
 	u16 zone;
@@ -2557,7 +2556,7 @@ ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb,
 		/* delete all expectations for this helper */
 		spin_lock_bh(&nf_conntrack_lock);
 		for (i = 0; i < nf_ct_expect_hsize; i++) {
-			hlist_for_each_entry_safe(exp, n, next,
+			hlist_for_each_entry_safe(exp, next,
 						  &net->ct.expect_hash[i],
 						  hnode) {
 				m_help = nfct_help(exp->master);
@@ -2575,7 +2574,7 @@ ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb,
 		/* This basically means we have to flush everything*/
 		spin_lock_bh(&nf_conntrack_lock);
 		for (i = 0; i < nf_ct_expect_hsize; i++) {
-			hlist_for_each_entry_safe(exp, n, next,
+			hlist_for_each_entry_safe(exp, next,
 						  &net->ct.expect_hash[i],
 						  hnode) {
 				if (del_timer(&exp->timeout)) {
diff --git a/net/netfilter/nf_conntrack_sip.c b/net/netfilter/nf_conntrack_sip.c
index 069229d919b..0e7d423324c 100644
--- a/net/netfilter/nf_conntrack_sip.c
+++ b/net/netfilter/nf_conntrack_sip.c
@@ -855,11 +855,11 @@ static int refresh_signalling_expectation(struct nf_conn *ct,
 {
 	struct nf_conn_help *help = nfct_help(ct);
 	struct nf_conntrack_expect *exp;
-	struct hlist_node *n, *next;
+	struct hlist_node *next;
 	int found = 0;
 
 	spin_lock_bh(&nf_conntrack_lock);
-	hlist_for_each_entry_safe(exp, n, next, &help->expectations, lnode) {
+	hlist_for_each_entry_safe(exp, next, &help->expectations, lnode) {
 		if (exp->class != SIP_EXPECT_SIGNALLING ||
 		    !nf_inet_addr_cmp(&exp->tuple.dst.u3, addr) ||
 		    exp->tuple.dst.protonum != proto ||
@@ -881,10 +881,10 @@ static void flush_expectations(struct nf_conn *ct, bool media)
 {
 	struct nf_conn_help *help = nfct_help(ct);
 	struct nf_conntrack_expect *exp;
-	struct hlist_node *n, *next;
+	struct hlist_node *next;
 
 	spin_lock_bh(&nf_conntrack_lock);
-	hlist_for_each_entry_safe(exp, n, next, &help->expectations, lnode) {
+	hlist_for_each_entry_safe(exp, next, &help->expectations, lnode) {
 		if ((exp->class != SIP_EXPECT_SIGNALLING) ^ media)
 			continue;
 		if (!del_timer(&exp->timeout))
diff --git a/net/netfilter/nf_nat_core.c b/net/netfilter/nf_nat_core.c
index 5f2f9109f46..8d5769c6d16 100644
--- a/net/netfilter/nf_nat_core.c
+++ b/net/netfilter/nf_nat_core.c
@@ -191,9 +191,8 @@ find_appropriate_src(struct net *net, u16 zone,
 	unsigned int h = hash_by_src(net, zone, tuple);
 	const struct nf_conn_nat *nat;
 	const struct nf_conn *ct;
-	const struct hlist_node *n;
 
-	hlist_for_each_entry_rcu(nat, n, &net->ct.nat_bysource[h], bysource) {
+	hlist_for_each_entry_rcu(nat, &net->ct.nat_bysource[h], bysource) {
 		ct = nat->ct;
 		if (same_src(ct, tuple) && nf_ct_zone(ct) == zone) {
 			/* Copy source part from reply tuple. */
diff --git a/net/netfilter/nfnetlink_cthelper.c b/net/netfilter/nfnetlink_cthelper.c
index 945950a8b1f..a191b6db657 100644
--- a/net/netfilter/nfnetlink_cthelper.c
+++ b/net/netfilter/nfnetlink_cthelper.c
@@ -282,7 +282,6 @@ nfnl_cthelper_new(struct sock *nfnl, struct sk_buff *skb,
 	const char *helper_name;
 	struct nf_conntrack_helper *cur, *helper = NULL;
 	struct nf_conntrack_tuple tuple;
-	struct hlist_node *n;
 	int ret = 0, i;
 
 	if (!tb[NFCTH_NAME] || !tb[NFCTH_TUPLE])
@@ -296,7 +295,7 @@ nfnl_cthelper_new(struct sock *nfnl, struct sk_buff *skb,
 
 	rcu_read_lock();
 	for (i = 0; i < nf_ct_helper_hsize && !helper; i++) {
-		hlist_for_each_entry_rcu(cur, n, &nf_ct_helper_hash[i], hnode) {
+		hlist_for_each_entry_rcu(cur, &nf_ct_helper_hash[i], hnode) {
 
 			/* skip non-userspace conntrack helpers. */
 			if (!(cur->flags & NF_CT_HELPER_F_USERSPACE))
@@ -452,13 +451,12 @@ static int
 nfnl_cthelper_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
 {
 	struct nf_conntrack_helper *cur, *last;
-	struct hlist_node *n;
 
 	rcu_read_lock();
 	last = (struct nf_conntrack_helper *)cb->args[1];
 	for (; cb->args[0] < nf_ct_helper_hsize; cb->args[0]++) {
 restart:
-		hlist_for_each_entry_rcu(cur, n,
+		hlist_for_each_entry_rcu(cur,
 				&nf_ct_helper_hash[cb->args[0]], hnode) {
 
 			/* skip non-userspace conntrack helpers. */
@@ -495,7 +493,6 @@ nfnl_cthelper_get(struct sock *nfnl, struct sk_buff *skb,
 {
 	int ret = -ENOENT, i;
 	struct nf_conntrack_helper *cur;
-	struct hlist_node *n;
 	struct sk_buff *skb2;
 	char *helper_name = NULL;
 	struct nf_conntrack_tuple tuple;
@@ -520,7 +517,7 @@ nfnl_cthelper_get(struct sock *nfnl, struct sk_buff *skb,
 	}
 
 	for (i = 0; i < nf_ct_helper_hsize; i++) {
-		hlist_for_each_entry_rcu(cur, n, &nf_ct_helper_hash[i], hnode) {
+		hlist_for_each_entry_rcu(cur, &nf_ct_helper_hash[i], hnode) {
 
 			/* skip non-userspace conntrack helpers. */
 			if (!(cur->flags & NF_CT_HELPER_F_USERSPACE))
@@ -568,7 +565,7 @@ nfnl_cthelper_del(struct sock *nfnl, struct sk_buff *skb,
 {
 	char *helper_name = NULL;
 	struct nf_conntrack_helper *cur;
-	struct hlist_node *n, *tmp;
+	struct hlist_node *tmp;
 	struct nf_conntrack_tuple tuple;
 	bool tuple_set = false, found = false;
 	int i, j = 0, ret;
@@ -585,7 +582,7 @@ nfnl_cthelper_del(struct sock *nfnl, struct sk_buff *skb,
 	}
 
 	for (i = 0; i < nf_ct_helper_hsize; i++) {
-		hlist_for_each_entry_safe(cur, n, tmp, &nf_ct_helper_hash[i],
+		hlist_for_each_entry_safe(cur, tmp, &nf_ct_helper_hash[i],
 								hnode) {
 			/* skip non-userspace conntrack helpers. */
 			if (!(cur->flags & NF_CT_HELPER_F_USERSPACE))
@@ -654,13 +651,13 @@ err_out:
 static void __exit nfnl_cthelper_exit(void)
 {
 	struct nf_conntrack_helper *cur;
-	struct hlist_node *n, *tmp;
+	struct hlist_node *tmp;
 	int i;
 
 	nfnetlink_subsys_unregister(&nfnl_cthelper_subsys);
 
 	for (i=0; i<nf_ct_helper_hsize; i++) {
-		hlist_for_each_entry_safe(cur, n, tmp, &nf_ct_helper_hash[i],
+		hlist_for_each_entry_safe(cur, tmp, &nf_ct_helper_hash[i],
 									hnode) {
 			/* skip non-userspace conntrack helpers. */
 			if (!(cur->flags & NF_CT_HELPER_F_USERSPACE))
diff --git a/net/netfilter/nfnetlink_log.c b/net/netfilter/nfnetlink_log.c
index 92fd8eca0d3..f248db57297 100644
--- a/net/netfilter/nfnetlink_log.c
+++ b/net/netfilter/nfnetlink_log.c
@@ -87,11 +87,10 @@ static struct nfulnl_instance *
 __instance_lookup(u_int16_t group_num)
 {
 	struct hlist_head *head;
-	struct hlist_node *pos;
 	struct nfulnl_instance *inst;
 
 	head = &instance_table[instance_hashfn(group_num)];
-	hlist_for_each_entry_rcu(inst, pos, head, hlist) {
+	hlist_for_each_entry_rcu(inst, head, hlist) {
 		if (inst->group_num == group_num)
 			return inst;
 	}
@@ -717,11 +716,11 @@ nfulnl_rcv_nl_event(struct notifier_block *this,
 		/* destroy all instances for this portid */
 		spin_lock_bh(&instances_lock);
 		for  (i = 0; i < INSTANCE_BUCKETS; i++) {
-			struct hlist_node *tmp, *t2;
+			struct hlist_node *t2;
 			struct nfulnl_instance *inst;
 			struct hlist_head *head = &instance_table[i];
 
-			hlist_for_each_entry_safe(inst, tmp, t2, head, hlist) {
+			hlist_for_each_entry_safe(inst, t2, head, hlist) {
 				if ((net_eq(n->net, &init_net)) &&
 				    (n->portid == inst->peer_portid))
 					__instance_destroy(inst);
diff --git a/net/netfilter/nfnetlink_queue_core.c b/net/netfilter/nfnetlink_queue_core.c
index 3158d87b56a..858fd52c104 100644
--- a/net/netfilter/nfnetlink_queue_core.c
+++ b/net/netfilter/nfnetlink_queue_core.c
@@ -80,11 +80,10 @@ static struct nfqnl_instance *
 instance_lookup(u_int16_t queue_num)
 {
 	struct hlist_head *head;
-	struct hlist_node *pos;
 	struct nfqnl_instance *inst;
 
 	head = &instance_table[instance_hashfn(queue_num)];
-	hlist_for_each_entry_rcu(inst, pos, head, hlist) {
+	hlist_for_each_entry_rcu(inst, head, hlist) {
 		if (inst->queue_num == queue_num)
 			return inst;
 	}
@@ -583,11 +582,10 @@ nfqnl_dev_drop(int ifindex)
 	rcu_read_lock();
 
 	for (i = 0; i < INSTANCE_BUCKETS; i++) {
-		struct hlist_node *tmp;
 		struct nfqnl_instance *inst;
 		struct hlist_head *head = &instance_table[i];
 
-		hlist_for_each_entry_rcu(inst, tmp, head, hlist)
+		hlist_for_each_entry_rcu(inst, head, hlist)
 			nfqnl_flush(inst, dev_cmp, ifindex);
 	}
 
@@ -627,11 +625,11 @@ nfqnl_rcv_nl_event(struct notifier_block *this,
 		/* destroy all instances for this portid */
 		spin_lock(&instances_lock);
 		for (i = 0; i < INSTANCE_BUCKETS; i++) {
-			struct hlist_node *tmp, *t2;
+			struct hlist_node *t2;
 			struct nfqnl_instance *inst;
 			struct hlist_head *head = &instance_table[i];
 
-			hlist_for_each_entry_safe(inst, tmp, t2, head, hlist) {
+			hlist_for_each_entry_safe(inst, t2, head, hlist) {
 				if ((n->net == &init_net) &&
 				    (n->portid == inst->peer_portid))
 					__instance_destroy(inst);
diff --git a/net/netfilter/xt_RATEEST.c b/net/netfilter/xt_RATEEST.c
index f264032b8c5..370adf622ce 100644
--- a/net/netfilter/xt_RATEEST.c
+++ b/net/netfilter/xt_RATEEST.c
@@ -43,12 +43,11 @@ static void xt_rateest_hash_insert(struct xt_rateest *est)
 struct xt_rateest *xt_rateest_lookup(const char *name)
 {
 	struct xt_rateest *est;
-	struct hlist_node *n;
 	unsigned int h;
 
 	h = xt_rateest_hash(name);
 	mutex_lock(&xt_rateest_mutex);
-	hlist_for_each_entry(est, n, &rateest_hash[h], list) {
+	hlist_for_each_entry(est, &rateest_hash[h], list) {
 		if (strcmp(est->name, name) == 0) {
 			est->refcnt++;
 			mutex_unlock(&xt_rateest_mutex);
diff --git a/net/netfilter/xt_connlimit.c b/net/netfilter/xt_connlimit.c
index 70b5591a258..c40b2695633 100644
--- a/net/netfilter/xt_connlimit.c
+++ b/net/netfilter/xt_connlimit.c
@@ -101,7 +101,7 @@ static int count_them(struct net *net,
 {
 	const struct nf_conntrack_tuple_hash *found;
 	struct xt_connlimit_conn *conn;
-	struct hlist_node *pos, *n;
+	struct hlist_node *n;
 	struct nf_conn *found_ct;
 	struct hlist_head *hash;
 	bool addit = true;
@@ -115,7 +115,7 @@ static int count_them(struct net *net,
 	rcu_read_lock();
 
 	/* check the saved connections */
-	hlist_for_each_entry_safe(conn, pos, n, hash, node) {
+	hlist_for_each_entry_safe(conn, n, hash, node) {
 		found    = nf_conntrack_find_get(net, NF_CT_DEFAULT_ZONE,
 						 &conn->tuple);
 		found_ct = NULL;
@@ -258,14 +258,14 @@ static void connlimit_mt_destroy(const struct xt_mtdtor_param *par)
 {
 	const struct xt_connlimit_info *info = par->matchinfo;
 	struct xt_connlimit_conn *conn;
-	struct hlist_node *pos, *n;
+	struct hlist_node *n;
 	struct hlist_head *hash = info->data->iphash;
 	unsigned int i;
 
 	nf_ct_l3proto_module_put(par->family);
 
 	for (i = 0; i < ARRAY_SIZE(info->data->iphash); ++i) {
-		hlist_for_each_entry_safe(conn, pos, n, &hash[i], node) {
+		hlist_for_each_entry_safe(conn, n, &hash[i], node) {
 			hlist_del(&conn->node);
 			kfree(conn);
 		}
diff --git a/net/netfilter/xt_hashlimit.c b/net/netfilter/xt_hashlimit.c
index 98218c896d2..f330e8beaf6 100644
--- a/net/netfilter/xt_hashlimit.c
+++ b/net/netfilter/xt_hashlimit.c
@@ -141,11 +141,10 @@ dsthash_find(const struct xt_hashlimit_htable *ht,
 	     const struct dsthash_dst *dst)
 {
 	struct dsthash_ent *ent;
-	struct hlist_node *pos;
 	u_int32_t hash = hash_dst(ht, dst);
 
 	if (!hlist_empty(&ht->hash[hash])) {
-		hlist_for_each_entry_rcu(ent, pos, &ht->hash[hash], node)
+		hlist_for_each_entry_rcu(ent, &ht->hash[hash], node)
 			if (dst_cmp(ent, dst)) {
 				spin_lock(&ent->lock);
 				return ent;
@@ -297,8 +296,8 @@ static void htable_selective_cleanup(struct xt_hashlimit_htable *ht,
 	spin_lock_bh(&ht->lock);
 	for (i = 0; i < ht->cfg.size; i++) {
 		struct dsthash_ent *dh;
-		struct hlist_node *pos, *n;
-		hlist_for_each_entry_safe(dh, pos, n, &ht->hash[i], node) {
+		struct hlist_node *n;
+		hlist_for_each_entry_safe(dh, n, &ht->hash[i], node) {
 			if ((*select)(ht, dh))
 				dsthash_free(ht, dh);
 		}
@@ -343,9 +342,8 @@ static struct xt_hashlimit_htable *htable_find_get(struct net *net,
 {
 	struct hashlimit_net *hashlimit_net = hashlimit_pernet(net);
 	struct xt_hashlimit_htable *hinfo;
-	struct hlist_node *pos;
 
-	hlist_for_each_entry(hinfo, pos, &hashlimit_net->htables, node) {
+	hlist_for_each_entry(hinfo, &hashlimit_net->htables, node) {
 		if (!strcmp(name, hinfo->pde->name) &&
 		    hinfo->family == family) {
 			hinfo->use++;
@@ -821,10 +819,9 @@ static int dl_seq_show(struct seq_file *s, void *v)
 	struct xt_hashlimit_htable *htable = s->private;
 	unsigned int *bucket = (unsigned int *)v;
 	struct dsthash_ent *ent;
-	struct hlist_node *pos;
 
 	if (!hlist_empty(&htable->hash[*bucket])) {
-		hlist_for_each_entry(ent, pos, &htable->hash[*bucket], node)
+		hlist_for_each_entry(ent, &htable->hash[*bucket], node)
 			if (dl_seq_real_show(ent, htable->family, s))
 				return -1;
 	}
@@ -877,7 +874,6 @@ static int __net_init hashlimit_proc_net_init(struct net *net)
 static void __net_exit hashlimit_proc_net_exit(struct net *net)
 {
 	struct xt_hashlimit_htable *hinfo;
-	struct hlist_node *pos;
 	struct proc_dir_entry *pde;
 	struct hashlimit_net *hashlimit_net = hashlimit_pernet(net);
 
@@ -890,7 +886,7 @@ static void __net_exit hashlimit_proc_net_exit(struct net *net)
 	if (pde == NULL)
 		pde = hashlimit_net->ip6t_hashlimit;
 
-	hlist_for_each_entry(hinfo, pos, &hashlimit_net->htables, node)
+	hlist_for_each_entry(hinfo, &hashlimit_net->htables, node)
 		remove_proc_entry(hinfo->pde->name, pde);
 
 	hashlimit_net->ipt_hashlimit = NULL;