L2TP_HASH_BITS 151 net/l2tp/l2tp_core.c return &tunnel->session_hlist[hash_32(session_id, L2TP_HASH_BITS)]; L2TP_HASH_BITS 25 net/l2tp/l2tp_core.h #define L2TP_HASH_SIZE (1 << L2TP_HASH_BITS)