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driver core: move device->knode_class to device_private 

As the description of struct device_private says, it stores data which
is private to driver core. And it already has similar fields like:
knode_parent, knode_driver, knode_driver and knode_bus. This look it is
more proper to put knode_class together with those fields to make it
private to driver core.

This patch move device->knode_class to device_private to make it comply
with code convention.

Signed-off-by: Wei Yang <richardw.yang@linux.intel.com>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Wei Yang 2019-01-18 10:34:59 +08:00 committed by Greg Kroah-Hartman
parent 4bd4e92cfe
commit 570d020012
4 changed files with 16 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/base/base.h
View File

@ -60,6 +60,7 @@ struct driver_private {
* @knode_parent - node in sibling list
* @knode_driver - node in driver list
* @knode_bus - node in bus list
* @knode_class - node in class list
* @deferred_probe - entry in deferred_probe_list which is used to retry the
* binding of drivers which were unable to get all the resources needed by
* the device; typically because it depends on another driver getting
@ -74,6 +75,7 @@ struct device_private {
struct klist_node knode_parent;
struct klist_node knode_driver;
struct klist_node knode_bus;
struct klist_node knode_class;
struct list_head deferred_probe;
struct device *device;
};
@ -83,6 +85,8 @@ struct device_private {
container_of(obj, struct device_private, knode_driver)
#define to_device_private_bus(obj) \
container_of(obj, struct device_private, knode_bus)
#define to_device_private_class(obj) \
container_of(obj, struct device_private, knode_class)
/* initialisation functions */
extern int devices_init(void);

14
drivers/base/class.c
View File

@ -117,16 +117,22 @@ static void class_put(struct class *cls)
kset_put(&cls->p->subsys);
}
static struct device *klist_class_to_dev(struct klist_node *n)
{
struct device_private *p = to_device_private_class(n);
return p->device;
}
static void klist_class_dev_get(struct klist_node *n)
{
struct device *dev = container_of(n, struct device, knode_class);
struct device *dev = klist_class_to_dev(n);
get_device(dev);
}
static void klist_class_dev_put(struct klist_node *n)
{
struct device *dev = container_of(n, struct device, knode_class);
struct device *dev = klist_class_to_dev(n);
put_device(dev);
}
@ -277,7 +283,7 @@ void class_dev_iter_init(struct class_dev_iter *iter, struct class *class,
struct klist_node *start_knode = NULL;
if (start)
start_knode = &start->knode_class;
start_knode = &start->p->knode_class;
klist_iter_init_node(&class->p->klist_devices, &iter->ki, start_knode);
iter->type = type;
}
@ -304,7 +310,7 @@ struct device *class_dev_iter_next(struct class_dev_iter *iter)
knode = klist_next(&iter->ki);
if (!knode)
return NULL;
dev = container_of(knode, struct device, knode_class);
dev = klist_class_to_dev(knode);
if (!iter->type || iter->type == dev->type)
return dev;
}

4
drivers/base/core.c
View File

@ -1966,7 +1966,7 @@ int device_add(struct device *dev)
if (dev->class) {
mutex_lock(&dev->class->p->mutex);
/* tie the class to the device */
klist_add_tail(&dev->knode_class,
klist_add_tail(&dev->p->knode_class,
&dev->class->p->klist_devices);
/* notify any interfaces that the device is here */
@ -2105,7 +2105,7 @@ void device_del(struct device *dev)
if (class_intf->remove_dev)
class_intf->remove_dev(dev, class_intf);
/* remove the device from the class list */
klist_del(&dev->knode_class);
klist_del(&dev->p->knode_class);
mutex_unlock(&dev->class->p->mutex);
}
device_remove_file(dev, &dev_attr_uevent);

1
include/linux/device.h
View File

@ -1035,7 +1035,6 @@ struct device {
spinlock_t devres_lock;
struct list_head devres_head;
struct klist_node knode_class;
struct class *class;
const struct attribute_group **groups; /* optional groups */