<dec f='src/src/sys/netinet/tcp_var.h' l='983' type='struct sackhole * tcp_sack_output(struct tcpcb * tp, int * sack_bytes_rexmt)'/>
<use f='src/src/sys/netinet/tcp_congctl.c' l='731' u='c' c='tcp_newreno_fast_retransmit_newack'/>
<use f='src/src/sys/netinet/tcp_output.c' l='763' u='c' c='tcp_output'/>
<def f='src/src/sys/netinet/tcp_sack.c' l='449' ll='471' type='struct sackhole * tcp_sack_output(struct tcpcb * tp, int * sack_bytes_rexmt)'/>
<doc f='src/src/sys/netinet/tcp_sack.c' l='445'>/*
 * Returns pointer to a sackhole if there are any pending retransmissions;
 * NULL otherwise.
 */</doc>
