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>

11 files changed, 50 insertions, 60 deletions

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c
index f4d2e9e3c6d5..c3f1afd86906 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c
@@ -2197,13 +2197,13 @@ static int ixgbe_get_ethtool_fdir_entry(struct ixgbe_adapter *adapter,
         union ixgbe_atr_input *mask = &adapter->fdir_mask;
         struct ethtool_rx_flow_spec *fsp =
                 (struct ethtool_rx_flow_spec *)&cmd->fs;
-        struct hlist_node *node, *node2;
+        struct hlist_node *node2;
         struct ixgbe_fdir_filter *rule = NULL;
 
         /* report total rule count */
         cmd->data = (1024 << adapter->fdir_pballoc) - 2;
 
-        hlist_for_each_entry_safe(rule, node, node2,
+        hlist_for_each_entry_safe(rule, node2,
                                   &adapter->fdir_filter_list, fdir_node) {
                 if (fsp->location <= rule->sw_idx)
                         break;
@@ -2264,14 +2264,14 @@ static int ixgbe_get_ethtool_fdir_all(struct ixgbe_adapter *adapter,
                                       struct ethtool_rxnfc *cmd,
                                       u32 *rule_locs)
 {
-        struct hlist_node *node, *node2;
+        struct hlist_node *node2;
         struct ixgbe_fdir_filter *rule;
         int cnt = 0;
 
         /* report total rule count */
         cmd->data = (1024 << adapter->fdir_pballoc) - 2;
 
-        hlist_for_each_entry_safe(rule, node, node2,
+        hlist_for_each_entry_safe(rule, node2,
                                   &adapter->fdir_filter_list, fdir_node) {
                 if (cnt == cmd->rule_cnt)
                         return -EMSGSIZE;
@@ -2358,19 +2358,19 @@ static int ixgbe_update_ethtool_fdir_entry(struct ixgbe_adapter *adapter,
                                            u16 sw_idx)
 {
         struct ixgbe_hw *hw = &adapter->hw;
-        struct hlist_node *node, *node2, *parent;
-        struct ixgbe_fdir_filter *rule;
+        struct hlist_node *node2;
+        struct ixgbe_fdir_filter *rule, *parent;
         int err = -EINVAL;
 
         parent = NULL;
         rule = NULL;
 
-        hlist_for_each_entry_safe(rule, node, node2,
+        hlist_for_each_entry_safe(rule, node2,
                                   &adapter->fdir_filter_list, fdir_node) {
                 /* hash found, or no matching entry */
                 if (rule->sw_idx >= sw_idx)
                         break;
-                parent = node;
+                parent = rule;
         }
 
         /* if there is an old rule occupying our place remove it */
@@ -2399,7 +2399,7 @@ static int ixgbe_update_ethtool_fdir_entry(struct ixgbe_adapter *adapter,
 
         /* add filter to the list */
         if (parent)
-                hlist_add_after(parent, &input->fdir_node);
+                hlist_add_after(&parent->fdir_node, &input->fdir_node);
         else
                 hlist_add_head(&input->fdir_node,
                                &adapter->fdir_filter_list);
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index 68478d6dfa2d..db5611ae407e 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -3891,7 +3891,7 @@ static void ixgbe_configure_pb(struct ixgbe_adapter *adapter)
 static void ixgbe_fdir_filter_restore(struct ixgbe_adapter *adapter)
 {
         struct ixgbe_hw *hw = &adapter->hw;
-        struct hlist_node *node, *node2;
+        struct hlist_node *node2;
         struct ixgbe_fdir_filter *filter;
 
         spin_lock(&adapter->fdir_perfect_lock);
@@ -3899,7 +3899,7 @@ static void ixgbe_fdir_filter_restore(struct ixgbe_adapter *adapter)
         if (!hlist_empty(&adapter->fdir_filter_list))
                 ixgbe_fdir_set_input_mask_82599(hw, &adapter->fdir_mask);
 
-        hlist_for_each_entry_safe(filter, node, node2,
+        hlist_for_each_entry_safe(filter, node2,
                                   &adapter->fdir_filter_list, fdir_node) {
                 ixgbe_fdir_write_perfect_filter_82599(hw,
                                 &filter->filter,
@@ -4356,12 +4356,12 @@ static void ixgbe_clean_all_tx_rings(struct ixgbe_adapter *adapter)
 
 static void ixgbe_fdir_filter_exit(struct ixgbe_adapter *adapter)
 {
-        struct hlist_node *node, *node2;
+        struct hlist_node *node2;
         struct ixgbe_fdir_filter *filter;
 
         spin_lock(&adapter->fdir_perfect_lock);
 
-        hlist_for_each_entry_safe(filter, node, node2,
+        hlist_for_each_entry_safe(filter, node2,
                                   &adapter->fdir_filter_list, fdir_node) {
                 hlist_del(&filter->fdir_node);
                 kfree(filter);
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
index 5385474bb526..bb4d8d99f36d 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
@@ -225,11 +225,10 @@ static inline struct mlx4_en_filter *
 mlx4_en_filter_find(struct mlx4_en_priv *priv, __be32 src_ip, __be32 dst_ip,
                     __be16 src_port, __be16 dst_port)
 {
-        struct hlist_node *elem;
         struct mlx4_en_filter *filter;
         struct mlx4_en_filter *ret = NULL;
 
-        hlist_for_each_entry(filter, elem,
+        hlist_for_each_entry(filter,
                              filter_hash_bucket(priv, src_ip, dst_ip,
                                                 src_port, dst_port),
                              filter_chain) {
@@ -574,13 +573,13 @@ static void mlx4_en_put_qp(struct mlx4_en_priv *priv)
 
         if (dev->caps.steering_mode != MLX4_STEERING_MODE_A0) {
                 struct mlx4_mac_entry *entry;
-                struct hlist_node *n, *tmp;
+                struct hlist_node *tmp;
                 struct hlist_head *bucket;
                 unsigned int mac_hash;
 
                 mac_hash = priv->dev->dev_addr[MLX4_EN_MAC_HASH_IDX];
                 bucket = &priv->mac_hash[mac_hash];
-                hlist_for_each_entry_safe(entry, n, tmp, bucket, hlist) {
+                hlist_for_each_entry_safe(entry, tmp, bucket, hlist) {
                         if (ether_addr_equal_64bits(entry->mac,
                                                     priv->dev->dev_addr)) {
                                 en_dbg(DRV, priv, "Releasing qp: port %d, MAC %pM, qpn %d\n",
@@ -609,11 +608,11 @@ static int mlx4_en_replace_mac(struct mlx4_en_priv *priv, int qpn,
                 struct hlist_head *bucket;
                 unsigned int mac_hash;
                 struct mlx4_mac_entry *entry;
-                struct hlist_node *n, *tmp;
+                struct hlist_node *tmp;
                 u64 prev_mac_u64 = mlx4_en_mac_to_u64(prev_mac);
 
                 bucket = &priv->mac_hash[prev_mac[MLX4_EN_MAC_HASH_IDX]];
-                hlist_for_each_entry_safe(entry, n, tmp, bucket, hlist) {
+                hlist_for_each_entry_safe(entry, tmp, bucket, hlist) {
                         if (ether_addr_equal_64bits(entry->mac, prev_mac)) {
                                 mlx4_en_uc_steer_release(priv, entry->mac,
                                                          qpn, entry->reg_id);
@@ -1019,7 +1018,7 @@ static void mlx4_en_do_uc_filter(struct mlx4_en_priv *priv,
 {
         struct netdev_hw_addr *ha;
         struct mlx4_mac_entry *entry;
-        struct hlist_node *n, *tmp;
+        struct hlist_node *tmp;
         bool found;
         u64 mac;
         int err = 0;
@@ -1035,7 +1034,7 @@ static void mlx4_en_do_uc_filter(struct mlx4_en_priv *priv,
         /* find what to remove */
         for (i = 0; i < MLX4_EN_MAC_HASH_SIZE; ++i) {
                 bucket = &priv->mac_hash[i];
-                hlist_for_each_entry_safe(entry, n, tmp, bucket, hlist) {
+                hlist_for_each_entry_safe(entry, tmp, bucket, hlist) {
                         found = false;
                         netdev_for_each_uc_addr(ha, dev) {
                                 if (ether_addr_equal_64bits(entry->mac,
@@ -1078,7 +1077,7 @@ static void mlx4_en_do_uc_filter(struct mlx4_en_priv *priv,
         netdev_for_each_uc_addr(ha, dev) {
                 found = false;
                 bucket = &priv->mac_hash[ha->addr[MLX4_EN_MAC_HASH_IDX]];
-                hlist_for_each_entry(entry, n, bucket, hlist) {
+                hlist_for_each_entry(entry, bucket, hlist) {
                         if (ether_addr_equal_64bits(entry->mac, ha->addr)) {
                                 found = true;
                                 break;
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_rx.c b/drivers/net/ethernet/mellanox/mlx4/en_rx.c
index ce38654bbdd0..c7f856308e1a 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_rx.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_rx.c
@@ -35,6 +35,7 @@
 #include <linux/slab.h>
 #include <linux/mlx4/qp.h>
 #include <linux/skbuff.h>
+#include <linux/rculist.h>
 #include <linux/if_ether.h>
 #include <linux/if_vlan.h>
 #include <linux/vmalloc.h>
@@ -617,7 +618,6 @@ int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int bud
 
                         if (is_multicast_ether_addr(ethh->h_dest)) {
                                 struct mlx4_mac_entry *entry;
-                                struct hlist_node *n;
                                 struct hlist_head *bucket;
                                 unsigned int mac_hash;
 
@@ -625,7 +625,7 @@ int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int bud
                                 mac_hash = ethh->h_source[MLX4_EN_MAC_HASH_IDX];
                                 bucket = &priv->mac_hash[mac_hash];
                                 rcu_read_lock();
-                                hlist_for_each_entry_rcu(entry, n, bucket, hlist) {
+                                hlist_for_each_entry_rcu(entry, bucket, hlist) {
                                         if (ether_addr_equal_64bits(entry->mac,
                                                                     ethh->h_source)) {
                                                 rcu_read_unlock();
diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_hw.c b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_hw.c
index 325e11e1ce0f..f89cc7a3fe6c 100644
--- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_hw.c
+++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_hw.c
@@ -576,7 +576,7 @@ void qlcnic_free_mac_list(struct qlcnic_adapter *adapter)
 void qlcnic_prune_lb_filters(struct qlcnic_adapter *adapter)
 {
         struct qlcnic_filter *tmp_fil;
-        struct hlist_node *tmp_hnode, *n;
+        struct hlist_node *n;
         struct hlist_head *head;
         int i;
         unsigned long time;
@@ -584,7 +584,7 @@ void qlcnic_prune_lb_filters(struct qlcnic_adapter *adapter)
 
         for (i = 0; i < adapter->fhash.fbucket_size; i++) {
                 head = &(adapter->fhash.fhead[i]);
-                hlist_for_each_entry_safe(tmp_fil, tmp_hnode, n, head, fnode) {
+                hlist_for_each_entry_safe(tmp_fil, n, head, fnode) {
                         cmd =  tmp_fil->vlan_id ? QLCNIC_MAC_VLAN_DEL :
                                                   QLCNIC_MAC_DEL;
                         time = tmp_fil->ftime;
@@ -604,7 +604,7 @@ void qlcnic_prune_lb_filters(struct qlcnic_adapter *adapter)
         for (i = 0; i < adapter->rx_fhash.fbucket_size; i++) {
                 head = &(adapter->rx_fhash.fhead[i]);
 
-                hlist_for_each_entry_safe(tmp_fil, tmp_hnode, n, head, fnode)
+                hlist_for_each_entry_safe(tmp_fil, n, head, fnode)
                 {
                         time = tmp_fil->ftime;
                         if (jiffies > (QLCNIC_FILTER_AGE * HZ + time)) {
@@ -621,14 +621,14 @@ void qlcnic_prune_lb_filters(struct qlcnic_adapter *adapter)
 void qlcnic_delete_lb_filters(struct qlcnic_adapter *adapter)
 {
         struct qlcnic_filter *tmp_fil;
-        struct hlist_node *tmp_hnode, *n;
+        struct hlist_node *n;
         struct hlist_head *head;
         int i;
         u8 cmd;
 
         for (i = 0; i < adapter->fhash.fbucket_size; i++) {
                 head = &(adapter->fhash.fhead[i]);
-                hlist_for_each_entry_safe(tmp_fil, tmp_hnode, n, head, fnode) {
+                hlist_for_each_entry_safe(tmp_fil, n, head, fnode) {
                         cmd =  tmp_fil->vlan_id ? QLCNIC_MAC_VLAN_DEL :
                                                   QLCNIC_MAC_DEL;
                         qlcnic_sre_macaddr_change(adapter,
diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_io.c b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_io.c
index 6387e0cc3ea9..0e630061bff3 100644
--- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_io.c
+++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_io.c
@@ -162,7 +162,7 @@ void qlcnic_add_lb_filter(struct qlcnic_adapter *adapter, struct sk_buff *skb,
 {
         struct ethhdr *phdr = (struct ethhdr *)(skb->data);
         struct qlcnic_filter *fil, *tmp_fil;
-        struct hlist_node *tmp_hnode, *n;
+        struct hlist_node *n;
         struct hlist_head *head;
         unsigned long time;
         u64 src_addr = 0;
@@ -179,7 +179,7 @@ void qlcnic_add_lb_filter(struct qlcnic_adapter *adapter, struct sk_buff *skb,
                          (adapter->fhash.fbucket_size - 1);
                 head = &(adapter->rx_fhash.fhead[hindex]);
 
-                hlist_for_each_entry_safe(tmp_fil, tmp_hnode, n, head, fnode) {
+                hlist_for_each_entry_safe(tmp_fil, n, head, fnode) {
                         if (!memcmp(tmp_fil->faddr, &src_addr, ETH_ALEN) &&
                             tmp_fil->vlan_id == vlan_id) {
                                 time = tmp_fil->ftime;
@@ -205,7 +205,7 @@ void qlcnic_add_lb_filter(struct qlcnic_adapter *adapter, struct sk_buff *skb,
                          (adapter->fhash.fbucket_size - 1);
                 head = &(adapter->rx_fhash.fhead[hindex]);
                 spin_lock(&adapter->rx_mac_learn_lock);
-                hlist_for_each_entry_safe(tmp_fil, tmp_hnode, n, head, fnode) {
+                hlist_for_each_entry_safe(tmp_fil, n, head, fnode) {
                         if (!memcmp(tmp_fil->faddr, &src_addr, ETH_ALEN) &&
                             tmp_fil->vlan_id == vlan_id) {
                                 found = 1;
@@ -272,7 +272,7 @@ static void qlcnic_send_filter(struct qlcnic_adapter *adapter,
                                struct sk_buff *skb)
 {
         struct qlcnic_filter *fil, *tmp_fil;
-        struct hlist_node *tmp_hnode, *n;
+        struct hlist_node *n;
         struct hlist_head *head;
         struct net_device *netdev = adapter->netdev;
         struct ethhdr *phdr = (struct ethhdr *)(skb->data);
@@ -294,7 +294,7 @@ static void qlcnic_send_filter(struct qlcnic_adapter *adapter,
         hindex = qlcnic_mac_hash(src_addr) & (adapter->fhash.fbucket_size - 1);
         head = &(adapter->fhash.fhead[hindex]);
 
-        hlist_for_each_entry_safe(tmp_fil, tmp_hnode, n, head, fnode) {
+        hlist_for_each_entry_safe(tmp_fil, n, head, fnode) {
                 if (!memcmp(tmp_fil->faddr, &src_addr, ETH_ALEN) &&
                     tmp_fil->vlan_id == vlan_id) {
                         if (jiffies > (QLCNIC_READD_AGE * HZ + tmp_fil->ftime))
diff --git a/drivers/net/ethernet/sun/sunvnet.c b/drivers/net/ethernet/sun/sunvnet.c
index 289b4eefb42f..1df0ff3839e8 100644
--- a/drivers/net/ethernet/sun/sunvnet.c
+++ b/drivers/net/ethernet/sun/sunvnet.c
@@ -614,10 +614,9 @@ struct vnet_port *__tx_port_find(struct vnet *vp, struct sk_buff *skb)
 {
         unsigned int hash = vnet_hashfn(skb->data);
         struct hlist_head *hp = &vp->port_hash[hash];
-        struct hlist_node *n;
         struct vnet_port *port;
 
-        hlist_for_each_entry(port, n, hp, hash) {
+        hlist_for_each_entry(port, hp, hash) {
                 if (ether_addr_equal(port->raddr, skb->data))
                         return port;
         }
diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c
index defcd8a85744..417b2af1aa80 100644
--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -55,9 +55,8 @@ static struct macvlan_dev *macvlan_hash_lookup(const struct macvlan_port *port,
                                                const unsigned char *addr)
 {
         struct macvlan_dev *vlan;
-        struct hlist_node *n;
 
-        hlist_for_each_entry_rcu(vlan, n, &port->vlan_hash[addr[5]], hlist) {
+        hlist_for_each_entry_rcu(vlan, &port->vlan_hash[addr[5]], hlist) {
                 if (ether_addr_equal_64bits(vlan->dev->dev_addr, addr))
                         return vlan;
         }
@@ -149,7 +148,6 @@ static void macvlan_broadcast(struct sk_buff *skb,
 {
         const struct ethhdr *eth = eth_hdr(skb);
         const struct macvlan_dev *vlan;
-        struct hlist_node *n;
         struct sk_buff *nskb;
         unsigned int i;
         int err;
@@ -159,7 +157,7 @@ static void macvlan_broadcast(struct sk_buff *skb,
                 return;
 
         for (i = 0; i < MACVLAN_HASH_SIZE; i++) {
-                hlist_for_each_entry_rcu(vlan, n, &port->vlan_hash[i], hlist) {
+                hlist_for_each_entry_rcu(vlan, &port->vlan_hash[i], hlist) {
                         if (vlan->dev == src || !(vlan->mode & mode))
                                 continue;
 
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index b6f45c5d84d5..2c6a22e278ea 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -197,9 +197,8 @@ static inline u32 tun_hashfn(u32 rxhash)
 static struct tun_flow_entry *tun_flow_find(struct hlist_head *head, u32 rxhash)
 {
         struct tun_flow_entry *e;
-        struct hlist_node *n;
 
-        hlist_for_each_entry_rcu(e, n, head, hash_link) {
+        hlist_for_each_entry_rcu(e, head, hash_link) {
                 if (e->rxhash == rxhash)
                         return e;
         }
@@ -241,9 +240,9 @@ static void tun_flow_flush(struct tun_struct *tun)
         spin_lock_bh(&tun->lock);
         for (i = 0; i < TUN_NUM_FLOW_ENTRIES; i++) {
                 struct tun_flow_entry *e;
-                struct hlist_node *h, *n;
+                struct hlist_node *n;
 
-                hlist_for_each_entry_safe(e, h, n, &tun->flows[i], hash_link)
+                hlist_for_each_entry_safe(e, n, &tun->flows[i], hash_link)
                         tun_flow_delete(tun, e);
         }
         spin_unlock_bh(&tun->lock);
@@ -256,9 +255,9 @@ static void tun_flow_delete_by_queue(struct tun_struct *tun, u16 queue_index)
         spin_lock_bh(&tun->lock);
         for (i = 0; i < TUN_NUM_FLOW_ENTRIES; i++) {
                 struct tun_flow_entry *e;
-                struct hlist_node *h, *n;
+                struct hlist_node *n;
 
-                hlist_for_each_entry_safe(e, h, n, &tun->flows[i], hash_link) {
+                hlist_for_each_entry_safe(e, n, &tun->flows[i], hash_link) {
                         if (e->queue_index == queue_index)
                                 tun_flow_delete(tun, e);
                 }
@@ -279,9 +278,9 @@ static void tun_flow_cleanup(unsigned long data)
         spin_lock_bh(&tun->lock);
         for (i = 0; i < TUN_NUM_FLOW_ENTRIES; i++) {
                 struct tun_flow_entry *e;
-                struct hlist_node *h, *n;
+                struct hlist_node *n;
 
-                hlist_for_each_entry_safe(e, h, n, &tun->flows[i], hash_link) {
+                hlist_for_each_entry_safe(e, n, &tun->flows[i], hash_link) {
                         unsigned long this_timer;
                         count++;
                         this_timer = e->updated + delay;
diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index f736823f8437..f10e58ac9c1b 100644
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -145,9 +145,8 @@ static inline struct hlist_head *vni_head(struct net *net, u32 id)
 static struct vxlan_dev *vxlan_find_vni(struct net *net, u32 id)
 {
         struct vxlan_dev *vxlan;
-        struct hlist_node *node;
 
-        hlist_for_each_entry_rcu(vxlan, node, vni_head(net, id), hlist) {
+        hlist_for_each_entry_rcu(vxlan, vni_head(net, id), hlist) {
                 if (vxlan->vni == id)
                         return vxlan;
         }
@@ -292,9 +291,8 @@ static struct vxlan_fdb *vxlan_find_mac(struct vxlan_dev *vxlan,
 {
         struct hlist_head *head = vxlan_fdb_head(vxlan, mac);
         struct vxlan_fdb *f;
-        struct hlist_node *node;
 
-        hlist_for_each_entry_rcu(f, node, head, hlist) {
+        hlist_for_each_entry_rcu(f, head, hlist) {
                 if (compare_ether_addr(mac, f->eth_addr) == 0)
                         return f;
         }
@@ -422,10 +420,9 @@ static int vxlan_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
 
         for (h = 0; h < FDB_HASH_SIZE; ++h) {
                 struct vxlan_fdb *f;
-                struct hlist_node *n;
                 int err;
 
-                hlist_for_each_entry_rcu(f, n, &vxlan->fdb_head[h], hlist) {
+                hlist_for_each_entry_rcu(f, &vxlan->fdb_head[h], hlist) {
                         if (idx < cb->args[0])
                                 goto skip;
 
@@ -483,11 +480,10 @@ static bool vxlan_group_used(struct vxlan_net *vn,
                              const struct vxlan_dev *this)
 {
         const struct vxlan_dev *vxlan;
-        struct hlist_node *node;
         unsigned h;
 
         for (h = 0; h < VNI_HASH_SIZE; ++h)
-                hlist_for_each_entry(vxlan, node, &vn->vni_list[h], hlist) {
+                hlist_for_each_entry(vxlan, &vn->vni_list[h], hlist) {
                         if (vxlan == this)
                                 continue;
 
diff --git a/drivers/net/wireless/zd1201.c b/drivers/net/wireless/zd1201.c
index 48273dd05b63..4941f201d6c8 100644
--- a/drivers/net/wireless/zd1201.c
+++ b/drivers/net/wireless/zd1201.c
@@ -309,7 +309,6 @@ static void zd1201_usbrx(struct urb *urb)
         if (data[urb->actual_length-1] == ZD1201_PACKET_RXDATA) {
                 int datalen = urb->actual_length-1;
                 unsigned short len, fc, seq;
-                struct hlist_node *node;
 
                 len = ntohs(*(__be16 *)&data[datalen-2]);
                 if (len>datalen)
@@ -362,7 +361,7 @@ static void zd1201_usbrx(struct urb *urb)
                                 hlist_add_head(&frag->fnode, &zd->fraglist);
                                 goto resubmit;
                         }
-                        hlist_for_each_entry(frag, node, &zd->fraglist, fnode)
+                        hlist_for_each_entry(frag, &zd->fraglist, fnode)
                                 if (frag->seq == (seq&IEEE80211_SCTL_SEQ))
                                         break;
                         if (!frag)
@@ -1831,14 +1830,14 @@ err_zd:
 static void zd1201_disconnect(struct usb_interface *interface)
 {
         struct zd1201 *zd = usb_get_intfdata(interface);
-        struct hlist_node *node, *node2;
+        struct hlist_node *node2;
         struct zd1201_frag *frag;
 
         if (!zd)
                 return;
         usb_set_intfdata(interface, NULL);
 
-        hlist_for_each_entry_safe(frag, node, node2, &zd->fraglist, fnode) {
+        hlist_for_each_entry_safe(frag, node2, &zd->fraglist, fnode) {
                 hlist_del_init(&frag->fnode);
                 kfree_skb(frag->skb);
                 kfree(frag);