CL_POINTER_TOGGLE
hba->u.mvfrey.inlist_wptr ^= CL_POINTER_TOGGLE;
hba->u.mvfrey.inlist_wptr = (list_count - 1) | CL_POINTER_TOGGLE;
*hba->u.mvfrey.outlist_cptr = (list_count - 1) | CL_POINTER_TOGGLE;