net/ipv4: make use of the helper macro LIST_HEAD()

list_head can be initialized automatically with LIST_HEAD()
instead of calling INIT_LIST_HEAD(). Here we can simplify
the code.
Signed-off-by: Hongbo Li <lihongbo22@huawei.com>
Link: https://patch.msgid.link/20240904093243.3345012-2-lihongbo22@huawei.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

net/ipv4/ip_input.c

@@ -596,9 +596,8 @@ static void ip_list_rcv_finish(struct net *net, struct sock *sk,
 {
 	struct sk_buff *skb, *next, *hint = NULL;
 	struct dst_entry *curr_dst = NULL;
-	struct list_head sublist;
+	LIST_HEAD(sublist);
 
-	INIT_LIST_HEAD(&sublist);
 	list_for_each_entry_safe(skb, next, head, list) {
 		struct net_device *dev = skb->dev;
 		struct dst_entry *dst;
@@ -646,9 +645,8 @@ void ip_list_rcv(struct list_head *head, struct packet_type *pt,
 	struct net_device *curr_dev = NULL;
 	struct net *curr_net = NULL;
 	struct sk_buff *skb, *next;
-	struct list_head sublist;
+	LIST_HEAD(sublist);
 
-	INIT_LIST_HEAD(&sublist);
 	list_for_each_entry_safe(skb, next, head, list) {
 		struct net_device *dev = skb->dev;
 		struct net *net = dev_net(dev);