[IPV4/IPV6]: synchronize_kernel --> synchronize_net.

net/ipv4/af_inet.c

@@ -1013,7 +1013,7 @@ void inet_register_protosw(struct inet_protosw *p)
 out:
 	spin_unlock_bh(&inetsw_lock);
 
-	synchronize_kernel();
+	synchronize_net();
 
 	return;
 
@@ -1040,7 +1040,7 @@ void inet_unregister_protosw(struct inet_protosw *p)
 		list_del_rcu(&p->list);
 		spin_unlock_bh(&inetsw_lock);
 
-		synchronize_kernel();
+		synchronize_net();
 	}
 }
 

net/ipv6/af_inet6.c

@@ -637,7 +637,7 @@ inet6_unregister_protosw(struct inet_protosw *p)
 		list_del_rcu(&p->list);
 		spin_unlock_bh(&inetsw6_lock);
 
-		synchronize_kernel();
+		synchronize_net();
 	}
 }