barrier_data
barrier_data(group->smstpcr);
barrier_data(priv->pub.base0 + priv->control_regs[reg]);
barrier_data(priv->pub.base0 + priv->control_regs[reg]);
barrier_data(priv->pub.base0 + off);
#ifndef barrier_data
barrier_data(s);
barrier_data(&init_##func); \
barrier_data(&result_##func); \