of: unittest: allow base devicetree to have symbol metadata

 *	of np into dup node (present in live tree) and

 *	updates parent of children of np to dup.

 *

 *	@np:	node already present in live tree

 *	@np:	node whose properties are being added to the live tree

 *	@dup:	node present in live tree to be updated

 */

static void update_node_properties(struct device_node *np,

					struct device_node *dup)

{

	struct property *prop;

	struct property *save_next;

	struct device_node *child;

	for_each_property_of_node(np, prop)

		of_add_property(dup, prop);

	int ret;

	for_each_child_of_node(np, child)

		child->parent = dup;

	/*

	 * "unittest internal error: unable to add testdata property"

	 *

	 *    If this message reports a property in node '/__symbols__' then

	 *    the respective unittest overlay contains a label that has the

	 *    same name as a label in the live devicetree.  The label will

	 *    be in the live devicetree only if the devicetree source was

	 *    compiled with the '-@' option.  If you encounter this error,

	 *    please consider renaming __all__ of the labels in the unittest

	 *    overlay dts files with an odd prefix that is unlikely to be

	 *    used in a real devicetree.

	 */

	/*

	 * open code for_each_property_of_node() because of_add_property()

	 * sets prop->next to NULL

	 */

	for (prop = np->properties; prop != NULL; prop = save_next) {

		save_next = prop->next;

		ret = of_add_property(dup, prop);

		if (ret)

			pr_err("unittest internal error: unable to add testdata property %pOF/%s",

			       np, prop->name);

	}

}

/**

 *

 *	@np:	Node to attach to live tree

 */

static int attach_node_and_children(struct device_node *np)

static void attach_node_and_children(struct device_node *np)

{

	struct device_node *next, *dup, *child;

	unsigned long flags;

	const char *full_name;

	full_name = kasprintf(GFP_KERNEL, "%pOF", np);

	if (!strcmp(full_name, "/__local_fixups__") ||

	    !strcmp(full_name, "/__fixups__"))

		return;

	dup = of_find_node_by_path(full_name);

	kfree(full_name);

	if (dup) {

		update_node_properties(np, dup);

		return 0;

		return;

	}

	child = np->child;

		attach_node_and_children(child);

		child = next;

	}

	return 0;

}

/**