as_add_callback
error = as_add_callback(as, nfs3_delmap_callback, dmapp,
error = as_add_callback(as, nfs4_delmap_callback, dmapp,
error = as_add_callback(as, nfs_delmap_callback, dmapp,
error = as_add_callback(as, umem_lock_undo, p, AS_ALL_EVENT,
int as_add_callback(struct as *, void (*)(), void *, uint_t,
e = as_add_callback(asp, xpvtap_segmf_unregister, state,