devm_ioremap_release
ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL);
void devm_ioremap_release(struct device *dev, void *res);
WARN_ON(devres_release(dev, devm_ioremap_release, devm_ioremap_match,
ptr = devres_alloc_node(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL,