net: Update [e/in]gress_needed static key to modern api

No changes in semantics -- key init is false; replace

static_key_slow_inc|dec   with   static_branch_inc|dec
static_key_false          with   static_branch_unlikely

Added a '_key' suffix to both ingress_needed and egress_needed,
for better self documentation.

Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/core/dev.c

@@ -1755,33 +1755,33 @@ int call_netdevice_notifiers(unsigned long val, struct net_device *dev)
 EXPORT_SYMBOL(call_netdevice_notifiers);
 
 #ifdef CONFIG_NET_INGRESS
-static struct static_key ingress_needed __read_mostly;
+static DEFINE_STATIC_KEY_FALSE(ingress_needed_key);
 
 void net_inc_ingress_queue(void)
 {
-	static_key_slow_inc(&ingress_needed);
+	static_branch_inc(&ingress_needed_key);
 }
 EXPORT_SYMBOL_GPL(net_inc_ingress_queue);
 
 void net_dec_ingress_queue(void)
 {
-	static_key_slow_dec(&ingress_needed);
+	static_branch_dec(&ingress_needed_key);
 }
 EXPORT_SYMBOL_GPL(net_dec_ingress_queue);
 #endif
 
 #ifdef CONFIG_NET_EGRESS
-static struct static_key egress_needed __read_mostly;
+static DEFINE_STATIC_KEY_FALSE(egress_needed_key);
 
 void net_inc_egress_queue(void)
 {
-	static_key_slow_inc(&egress_needed);
+	static_branch_inc(&egress_needed_key);
 }
 EXPORT_SYMBOL_GPL(net_inc_egress_queue);
 
 void net_dec_egress_queue(void)
 {
-	static_key_slow_dec(&egress_needed);
+	static_branch_dec(&egress_needed_key);
 }
 EXPORT_SYMBOL_GPL(net_dec_egress_queue);
 #endif
@@ -3532,7 +3532,7 @@ static int __dev_queue_xmit(struct sk_buff *skb, void *accel_priv)
 #ifdef CONFIG_NET_CLS_ACT
 	skb->tc_at_ingress = 0;
 # ifdef CONFIG_NET_EGRESS
-	if (static_key_false(&egress_needed)) {
+	if (static_branch_unlikely(&egress_needed_key)) {
 		skb = sch_handle_egress(skb, &rc, dev);
 		if (!skb)
 			goto out;
@@ -4566,7 +4566,7 @@ another_round:
 
 skip_taps:
 #ifdef CONFIG_NET_INGRESS
-	if (static_key_false(&ingress_needed)) {
+	if (static_branch_unlikely(&ingress_needed_key)) {
 		skb = sch_handle_ingress(skb, &pt_prev, &ret, orig_dev);
 		if (!skb)
 			goto out;