ipv4: remove unnecessary type castings

remove unnecessary void* type castings.
Signed-off-by: NYu Zhe <yuzhe@nfschina.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/ipv4/fib_frontend.c

@@ -1384,7 +1384,7 @@ static void nl_fib_input(struct sk_buff *skb)
 		return;
 	nlh = nlmsg_hdr(skb);
 
-	frn = (struct fib_result_nl *) nlmsg_data(nlh);
+	frn = nlmsg_data(nlh);
 	nl_fib_lookup(net, frn);
 
 	portid = NETLINK_CB(skb).portid;      /* netlink portid */
@@ -1425,7 +1425,7 @@ static void fib_disable_ip(struct net_device *dev, unsigned long event,
 
 static int fib_inetaddr_event(struct notifier_block *this, unsigned long event, void *ptr)
 {
-	struct in_ifaddr *ifa = (struct in_ifaddr *)ptr;
+	struct in_ifaddr *ifa = ptr;
 	struct net_device *dev = ifa->ifa_dev->dev;
 	struct net *net = dev_net(dev);
 

net/ipv4/fib_rules.c

@@ -145,7 +145,7 @@ INDIRECT_CALLABLE_SCOPE bool fib4_rule_suppress(struct fib_rule *rule,
 						int flags,
 						struct fib_lookup_arg *arg)
 {
-	struct fib_result *result = (struct fib_result *) arg->result;
+	struct fib_result *result = arg->result;
 	struct net_device *dev = NULL;
 
 	if (result->fi) {

net/ipv4/fib_trie.c

@@ -2625,7 +2625,7 @@ static void fib_table_print(struct seq_file *seq, struct fib_table *tb)
 
 static int fib_triestat_seq_show(struct seq_file *seq, void *v)
 {
-	struct net *net = (struct net *)seq->private;
+	struct net *net = seq->private;
 	unsigned int h;
 
 	seq_printf(seq,

net/ipv4/icmp.c

@@ -342,7 +342,7 @@ void icmp_out_count(struct net *net, unsigned char type)
 static int icmp_glue_bits(void *from, char *to, int offset, int len, int odd,
 			  struct sk_buff *skb)
 {
-	struct icmp_bxm *icmp_param = (struct icmp_bxm *)from;
+	struct icmp_bxm *icmp_param = from;
 	__wsum csum;
 
 	csum = skb_copy_and_csum_bits(icmp_param->skb,

net/ipv4/igmp.c

@@ -2836,7 +2836,7 @@ static int igmp_mc_seq_show(struct seq_file *seq, void *v)
 		seq_puts(seq,
 			 "Idx\tDevice    : Count Querier\tGroup    Users Timer\tReporter\n");
 	else {
-		struct ip_mc_list *im = (struct ip_mc_list *)v;
+		struct ip_mc_list *im = v;
 		struct igmp_mc_iter_state *state = igmp_mc_seq_private(seq);
 		char   *querier;
 		long delta;
@@ -2980,7 +2980,7 @@ static void igmp_mcf_seq_stop(struct seq_file *seq, void *v)
 
 static int igmp_mcf_seq_show(struct seq_file *seq, void *v)
 {
-	struct ip_sf_list *psf = (struct ip_sf_list *)v;
+	struct ip_sf_list *psf = v;
 	struct igmp_mcf_iter_state *state = igmp_mcf_seq_private(seq);
 
 	if (v == SEQ_START_TOKEN) {

net/ipv4/inet_fragment.c

@@ -510,7 +510,7 @@ EXPORT_SYMBOL(inet_frag_reasm_prepare);
 void inet_frag_reasm_finish(struct inet_frag_queue *q, struct sk_buff *head,
 			    void *reasm_data, bool try_coalesce)
 {
-	struct sk_buff **nextp = (struct sk_buff **)reasm_data;
+	struct sk_buff **nextp = reasm_data;
 	struct rb_node *rbn;
 	struct sk_buff *fp;
 	int sum_truesize;

net/ipv4/ipmr.c

@@ -356,7 +356,7 @@ static inline int ipmr_hash_cmp(struct rhashtable_compare_arg *arg,
 				const void *ptr)
 {
 	const struct mfc_cache_cmp_arg *cmparg = arg->key;
-	struct mfc_cache *c = (struct mfc_cache *)ptr;
+	const struct mfc_cache *c = ptr;
 
 	return cmparg->mfc_mcastgrp != c->mfc_mcastgrp ||
 	       cmparg->mfc_origin != c->mfc_origin;

net/ipv4/ping.c

@@ -590,7 +590,7 @@ EXPORT_SYMBOL_GPL(ping_err);
 int ping_getfrag(void *from, char *to,
 		 int offset, int fraglen, int odd, struct sk_buff *skb)
 {
-	struct pingfakehdr *pfh = (struct pingfakehdr *)from;
+	struct pingfakehdr *pfh = from;
 
 	if (offset == 0) {
 		fraglen -= sizeof(struct icmphdr);