hlist_nulls_for_each_entry_rcu 119 include/linux/udp.h hlist_nulls_for_each_entry_rcu(__sk, node, list, __sk_common.skc_portaddr_node) hlist_nulls_for_each_entry_rcu 652 include/net/sock.h hlist_nulls_for_each_entry_rcu(__sk, node, list, sk_nulls_node)