nm_msg_t
nm_msg_t *n_msg, *m; \
#define NM_LEN(len) (sizeof (nm_msg_t) + (len) - 1)
nm_msg_t *head;
nm_msg_t *now_serving;
nm_msg_t *msg;
msg = (nm_msg_t *)kmem_zalloc(NM_LEN(len), KM_SLEEP);
nm_msg_t *msg;