taglinefilesource code
th_cache_sk453net/ipv4/tcp.cvolatile struct sock *th_cache_sk;
th_cache_sk464net/ipv4/tcp.cth_cache_sk=NULL;
th_cache_sk3168net/ipv4/tcp.cif(th_cache_sk==sk)
th_cache_sk4744net/ipv4/tcp.csk=(struct sock *)th_cache_sk;
th_cache_sk4758net/ipv4/tcp.cth_cache_sk=sk;