[NETFILTER]: {nf_netlink,ip,ip6}_queue: use list_for_each_entry

Use list_add_tail/list_for_each_entry instead of list_add and
list_for_each_prev as a preparation for switching to RCU.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 9 insertions, 15 deletions

diff --git a/net/ipv4/netfilter/ip_queue.c b/net/ipv4/netfilter/ip_queue.c
index 2966fbddce8b..9e72246ede25 100644
--- a/net/ipv4/netfilter/ip_queue.c
+++ b/net/ipv4/netfilter/ip_queue.c
@@ -73,7 +73,7 @@ ipq_issue_verdict(struct ipq_queue_entry *entry, int verdict)
 static inline void
 __ipq_enqueue_entry(struct ipq_queue_entry *entry)
 {
-       list_add(&entry->list, &queue_list);
+       list_add_tail(&entry->list, &queue_list);
        queue_total++;
 }
 
@@ -84,11 +84,9 @@ __ipq_enqueue_entry(struct ipq_queue_entry *entry)
 static inline struct ipq_queue_entry *
 __ipq_find_entry(ipq_cmpfn cmpfn, unsigned long data)
 {
-        struct list_head *p;
-
-        list_for_each_prev(p, &queue_list) {
-                struct ipq_queue_entry *entry = (struct ipq_queue_entry *)p;
+        struct ipq_queue_entry *entry;
 
+        list_for_each_entry(entry, &queue_list, list) {
                 if (!cmpfn || cmpfn(entry, data))
                         return entry;
         }
diff --git a/net/ipv6/netfilter/ip6_queue.c b/net/ipv6/netfilter/ip6_queue.c
index 7ff9915750a3..243a00bcd3df 100644
--- a/net/ipv6/netfilter/ip6_queue.c
+++ b/net/ipv6/netfilter/ip6_queue.c
@@ -71,7 +71,7 @@ ipq_issue_verdict(struct ipq_queue_entry *entry, int verdict)
 static inline void
 __ipq_enqueue_entry(struct ipq_queue_entry *entry)
 {
-       list_add(&entry->list, &queue_list);
+       list_add_tail(&entry->list, &queue_list);
        queue_total++;
 }
 
@@ -82,11 +82,9 @@ __ipq_enqueue_entry(struct ipq_queue_entry *entry)
 static inline struct ipq_queue_entry *
 __ipq_find_entry(ipq_cmpfn cmpfn, unsigned long data)
 {
-        struct list_head *p;
-
-        list_for_each_prev(p, &queue_list) {
-                struct ipq_queue_entry *entry = (struct ipq_queue_entry *)p;
+        struct ipq_queue_entry *entry;
 
+        list_for_each_entry(entry, &queue_list, list) {
                 if (!cmpfn || cmpfn(entry, data))
                         return entry;
         }
diff --git a/net/netfilter/nfnetlink_queue.c b/net/netfilter/nfnetlink_queue.c
index 3a09f021065a..74d5ed9490a9 100644
--- a/net/netfilter/nfnetlink_queue.c
+++ b/net/netfilter/nfnetlink_queue.c
@@ -231,7 +231,7 @@ static inline void
 __enqueue_entry(struct nfqnl_instance *queue,
                       struct nfqnl_queue_entry *entry)
 {
-       list_add(&entry->list, &queue->queue_list);
+       list_add_tail(&entry->list, &queue->queue_list);
        queue->queue_total++;
 }
 
@@ -243,11 +243,9 @@ static inline struct nfqnl_queue_entry *
 __find_entry(struct nfqnl_instance *queue, nfqnl_cmpfn cmpfn,
                    unsigned long data)
 {
-        struct list_head *p;
-
-        list_for_each_prev(p, &queue->queue_list) {
-                struct nfqnl_queue_entry *entry = (struct nfqnl_queue_entry *)p;
+        struct nfqnl_queue_entry *entry;
 
+        list_for_each_entry(entry, &queue->queue_list, list) {
                 if (!cmpfn || cmpfn(entry, data))
                         return entry;
         }