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Commit ae1b4171 authored by Greg Kroah-Hartman's avatar Greg Kroah-Hartman
Browse files

driver core: move knode_bus into private structure 



Nothing outside of the driver core should ever touch knode_bus, so
move it out of the public eye.

Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 8940b4f3

drivers/base/base.h

+4 −0
Original line number Diff line number Diff line
@@ -69,6 +69,7 @@ struct class_private { 
 * @klist_children - klist containing all children of this device

 * @knode_parent - node in sibling list

 * @knode_driver - node in driver list

 * @knode_bus - node in bus list

 * @device - pointer back to the struct class that this structure is

 * associated with.

 *
@@ -78,12 +79,15 @@ struct device_private { 
	struct klist klist_children;

	struct klist_node knode_parent;

	struct klist_node knode_driver;

	struct klist_node knode_bus;

	struct device *device;

};

#define to_device_private_parent(obj)	\

	container_of(obj, struct device_private, knode_parent)

#define to_device_private_driver(obj)	\

	container_of(obj, struct device_private, knode_driver)

#define to_device_private_bus(obj)	\

	container_of(obj, struct device_private, knode_bus)



/* initialisation functions */

extern int devices_init(void);

drivers/base/bus.c

+27 −13
Original line number Diff line number Diff line
@@ -253,7 +253,14 @@ static ssize_t store_drivers_probe(struct bus_type *bus, 
static struct device *next_device(struct klist_iter *i)

{

	struct klist_node *n = klist_next(i);

	return n ? container_of(n, struct device, knode_bus) : NULL;

	struct device *dev = NULL;

	struct device_private *dev_prv;



	if (n) {

		dev_prv = to_device_private_bus(n);

		dev = dev_prv->device;

	}

	return dev;

}



/**
@@ -286,7 +293,7 @@ int bus_for_each_dev(struct bus_type *bus, struct device *start, 
		return -EINVAL;



	klist_iter_init_node(&bus->p->klist_devices, &i,

			     (start ? &start->knode_bus : NULL));

			     (start ? &start->p->knode_bus : NULL));

	while ((dev = next_device(&i)) && !error)

		error = fn(dev, data);

	klist_iter_exit(&i);
@@ -320,7 +327,7 @@ struct device *bus_find_device(struct bus_type *bus, 
		return NULL;



	klist_iter_init_node(&bus->p->klist_devices, &i,

			     (start ? &start->knode_bus : NULL));

			     (start ? &start->p->knode_bus : NULL));

	while ((dev = next_device(&i)))

		if (match(dev, data) && get_device(dev))

			break;
@@ -507,7 +514,8 @@ void bus_attach_device(struct device *dev) 
			ret = device_attach(dev);

		WARN_ON(ret < 0);

		if (ret >= 0)

			klist_add_tail(&dev->knode_bus, &bus->p->klist_devices);

			klist_add_tail(&dev->p->knode_bus,

				       &bus->p->klist_devices);

	}

}
@@ -528,8 +536,8 @@ void bus_remove_device(struct device *dev) 
		sysfs_remove_link(&dev->bus->p->devices_kset->kobj,

				  dev_name(dev));

		device_remove_attrs(dev->bus, dev);

		if (klist_node_attached(&dev->knode_bus))

			klist_del(&dev->knode_bus);

		if (klist_node_attached(&dev->p->knode_bus))

			klist_del(&dev->p->knode_bus);



		pr_debug("bus: '%s': remove device %s\n",

			 dev->bus->name, dev_name(dev));
@@ -831,14 +839,16 @@ static void bus_remove_attrs(struct bus_type *bus) 


static void klist_devices_get(struct klist_node *n)

{

	struct device *dev = container_of(n, struct device, knode_bus);

	struct device_private *dev_prv = to_device_private_bus(n);

	struct device *dev = dev_prv->device;



	get_device(dev);

}



static void klist_devices_put(struct klist_node *n)

{

	struct device *dev = container_of(n, struct device, knode_bus);

	struct device_private *dev_prv = to_device_private_bus(n);

	struct device *dev = dev_prv->device;



	put_device(dev);

}
@@ -995,18 +1005,20 @@ static void device_insertion_sort_klist(struct device *a, struct list_head *list 
{

	struct list_head *pos;

	struct klist_node *n;

	struct device_private *dev_prv;

	struct device *b;



	list_for_each(pos, list) {

		n = container_of(pos, struct klist_node, n_node);

		b = container_of(n, struct device, knode_bus);

		dev_prv = to_device_private_bus(n);

		b = dev_prv->device;

		if (compare(a, b) <= 0) {

			list_move_tail(&a->knode_bus.n_node,

				       &b->knode_bus.n_node);

			list_move_tail(&a->p->knode_bus.n_node,

				       &b->p->knode_bus.n_node);

			return;

		}

	}

	list_move_tail(&a->knode_bus.n_node, list);

	list_move_tail(&a->p->knode_bus.n_node, list);

}



void bus_sort_breadthfirst(struct bus_type *bus,
@@ -1016,6 +1028,7 @@ void bus_sort_breadthfirst(struct bus_type *bus, 
	LIST_HEAD(sorted_devices);

	struct list_head *pos, *tmp;

	struct klist_node *n;

	struct device_private *dev_prv;

	struct device *dev;

	struct klist *device_klist;
@@ -1024,7 +1037,8 @@ void bus_sort_breadthfirst(struct bus_type *bus, 
	spin_lock(&device_klist->k_lock);

	list_for_each_safe(pos, tmp, &device_klist->k_list) {

		n = container_of(pos, struct klist_node, n_node);

		dev = container_of(n, struct device, knode_bus);

		dev_prv = to_device_private_bus(n);

		dev = dev_prv->device;

		device_insertion_sort_klist(dev, &sorted_devices, compare);

	}

	list_splice(&sorted_devices, &device_klist->k_list);

include/linux/device.h

+0 −1
Original line number Diff line number Diff line
@@ -368,7 +368,6 @@ struct device_dma_parameters { 
};



struct device {

	struct klist_node	knode_bus;

	struct device		*parent;



	struct device_private	*p;