cid_t
cid_t *cid = &ipgpc_cid_list[in_class_id];
sizeof (cid_t) * ipgpc_max_num_classes);
ipgpc_cid_list = kmem_zalloc(sizeof (cid_t) * ipgpc_max_num_classes,
cid_t *ipgpc_cid_list = NULL; /* class id list */
extern cid_t *ipgpc_cid_list; /* class id list */