how_many_unacked  111 include/net/llc_conn.h int llc_conn_remove_acked_pdus(struct sock *conn, u8 nr, u16 *how_many_unacked);
how_many_unacked  293 net/llc/llc_conn.c int llc_conn_remove_acked_pdus(struct sock *sk, u8 nr, u16 *how_many_unacked)
how_many_unacked  317 net/llc/llc_conn.c 	*how_many_unacked = skb_queue_len(&llc->pdu_unack_q);