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Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6

Browse source 
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6:
  Revert "driver core: create a private portion of struct device"
  Revert "driver core: move klist_children into private structure"
  Revert "driver core: move knode_driver into private structure"
  Revert "driver core: move knode_bus into private structure"
This commit is contained in:
Linus Torvalds 2009-01-09 15:30:54 -08:00
commit 0d34052dfe
6 changed files with 38 additions and 106 deletions
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26
drivers/base/base.h
View file

@ -63,32 +63,6 @@ struct class_private {
#define to_class(obj) \ #define to_class(obj) \
container_of(obj, struct class_private, class_subsys.kobj) container_of(obj, struct class_private, class_subsys.kobj)
/**
* struct device_private - structure to hold the private to the driver core portions of the device structure.
*
* @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.
*
* Nothing outside of the driver core should ever touch these fields.
*/
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 */ /* initialisation functions */
extern int devices_init(void); extern int devices_init(void);
extern int buses_init(void); extern int buses_init(void);

40
drivers/base/bus.c
View file

@ -253,14 +253,7 @@ static ssize_t store_drivers_probe(struct bus_type *bus,
static struct device *next_device(struct klist_iter *i) static struct device *next_device(struct klist_iter *i)
{ {
struct klist_node *n = klist_next(i); struct klist_node *n = klist_next(i);
struct device *dev = NULL; return n ? container_of(n, struct device, knode_bus) : NULL;
struct device_private *dev_prv;
if (n) {
dev_prv = to_device_private_bus(n);
dev = dev_prv->device;
}
return dev;
} }
/** /**
@ -293,7 +286,7 @@ int bus_for_each_dev(struct bus_type *bus, struct device *start,
return -EINVAL; return -EINVAL;
klist_iter_init_node(&bus->p->klist_devices, &i, klist_iter_init_node(&bus->p->klist_devices, &i,
(start ? &start->p->knode_bus : NULL)); (start ? &start->knode_bus : NULL));
while ((dev = next_device(&i)) && !error) while ((dev = next_device(&i)) && !error)
error = fn(dev, data); error = fn(dev, data);
klist_iter_exit(&i); klist_iter_exit(&i);
@ -327,7 +320,7 @@ struct device *bus_find_device(struct bus_type *bus,
return NULL; return NULL;
klist_iter_init_node(&bus->p->klist_devices, &i, klist_iter_init_node(&bus->p->klist_devices, &i,
(start ? &start->p->knode_bus : NULL)); (start ? &start->knode_bus : NULL));
while ((dev = next_device(&i))) while ((dev = next_device(&i)))
if (match(dev, data) && get_device(dev)) if (match(dev, data) && get_device(dev))
break; break;
@ -514,8 +507,7 @@ void bus_attach_device(struct device *dev)
ret = device_attach(dev); ret = device_attach(dev);
WARN_ON(ret < 0); WARN_ON(ret < 0);
if (ret >= 0) if (ret >= 0)
klist_add_tail(&dev->p->knode_bus, klist_add_tail(&dev->knode_bus, &bus->p->klist_devices);
&bus->p->klist_devices);
} }
} }
@ -536,8 +528,8 @@ void bus_remove_device(struct device *dev)
sysfs_remove_link(&dev->bus->p->devices_kset->kobj, sysfs_remove_link(&dev->bus->p->devices_kset->kobj,
dev_name(dev)); dev_name(dev));
device_remove_attrs(dev->bus, dev); device_remove_attrs(dev->bus, dev);
if (klist_node_attached(&dev->p->knode_bus)) if (klist_node_attached(&dev->knode_bus))
klist_del(&dev->p->knode_bus); klist_del(&dev->knode_bus);
pr_debug("bus: '%s': remove device %s\n", pr_debug("bus: '%s': remove device %s\n",
dev->bus->name, dev_name(dev)); dev->bus->name, dev_name(dev));
@ -839,16 +831,14 @@ static void bus_remove_attrs(struct bus_type *bus)
static void klist_devices_get(struct klist_node *n) static void klist_devices_get(struct klist_node *n)
{ {
struct device_private *dev_prv = to_device_private_bus(n); struct device *dev = container_of(n, struct device, knode_bus);
struct device *dev = dev_prv->device;
get_device(dev); get_device(dev);
} }
static void klist_devices_put(struct klist_node *n) static void klist_devices_put(struct klist_node *n)
{ {
struct device_private *dev_prv = to_device_private_bus(n); struct device *dev = container_of(n, struct device, knode_bus);
struct device *dev = dev_prv->device;
put_device(dev); put_device(dev);
} }
@ -1003,20 +993,18 @@ static void device_insertion_sort_klist(struct device *a, struct list_head *list
{ {
struct list_head *pos; struct list_head *pos;
struct klist_node *n; struct klist_node *n;
struct device_private *dev_prv;
struct device *b; struct device *b;
list_for_each(pos, list) { list_for_each(pos, list) {
n = container_of(pos, struct klist_node, n_node); n = container_of(pos, struct klist_node, n_node);
dev_prv = to_device_private_bus(n); b = container_of(n, struct device, knode_bus);
b = dev_prv->device;
if (compare(a, b) <= 0) { if (compare(a, b) <= 0) {
list_move_tail(&a->p->knode_bus.n_node, list_move_tail(&a->knode_bus.n_node,
&b->p->knode_bus.n_node); &b->knode_bus.n_node);
return; return;
} }
} }
list_move_tail(&a->p->knode_bus.n_node, list); list_move_tail(&a->knode_bus.n_node, list);
} }
void bus_sort_breadthfirst(struct bus_type *bus, void bus_sort_breadthfirst(struct bus_type *bus,
@ -1026,7 +1014,6 @@ void bus_sort_breadthfirst(struct bus_type *bus,
LIST_HEAD(sorted_devices); LIST_HEAD(sorted_devices);
struct list_head *pos, *tmp; struct list_head *pos, *tmp;
struct klist_node *n; struct klist_node *n;
struct device_private *dev_prv;
struct device *dev; struct device *dev;
struct klist *device_klist; struct klist *device_klist;
@ -1035,8 +1022,7 @@ void bus_sort_breadthfirst(struct bus_type *bus,
spin_lock(&device_klist->k_lock); spin_lock(&device_klist->k_lock);
list_for_each_safe(pos, tmp, &device_klist->k_list) { list_for_each_safe(pos, tmp, &device_klist->k_list) {
n = container_of(pos, struct klist_node, n_node); n = container_of(pos, struct klist_node, n_node);
dev_prv = to_device_private_bus(n); dev = container_of(n, struct device, knode_bus);
dev = dev_prv->device;
device_insertion_sort_klist(dev, &sorted_devices, compare); device_insertion_sort_klist(dev, &sorted_devices, compare);
} }
list_splice(&sorted_devices, &device_klist->k_list); list_splice(&sorted_devices, &device_klist->k_list);

45
drivers/base/core.c
View file

@ -109,7 +109,6 @@ static struct sysfs_ops dev_sysfs_ops = {
static void device_release(struct kobject *kobj) static void device_release(struct kobject *kobj)
{ {
struct device *dev = to_dev(kobj); struct device *dev = to_dev(kobj);
struct device_private *p = dev->p;
if (dev->release) if (dev->release)
dev->release(dev); dev->release(dev);
@ -121,7 +120,6 @@ static void device_release(struct kobject *kobj)
WARN(1, KERN_ERR "Device '%s' does not have a release() " WARN(1, KERN_ERR "Device '%s' does not have a release() "
"function, it is broken and must be fixed.\n", "function, it is broken and must be fixed.\n",
dev_name(dev)); dev_name(dev));
kfree(p);
} }
static struct kobj_type device_ktype = { static struct kobj_type device_ktype = {
@ -509,16 +507,14 @@ EXPORT_SYMBOL_GPL(device_schedule_callback_owner);
static void klist_children_get(struct klist_node *n) static void klist_children_get(struct klist_node *n)
{ {
struct device_private *p = to_device_private_parent(n); struct device *dev = container_of(n, struct device, knode_parent);
struct device *dev = p->device;
get_device(dev); get_device(dev);
} }
static void klist_children_put(struct klist_node *n) static void klist_children_put(struct klist_node *n)
{ {
struct device_private *p = to_device_private_parent(n); struct device *dev = container_of(n, struct device, knode_parent);
struct device *dev = p->device;
put_device(dev); put_device(dev);
} }
@ -540,15 +536,9 @@ static void klist_children_put(struct klist_node *n)
*/ */
void device_initialize(struct device *dev) void device_initialize(struct device *dev)
{ {
dev->p = kzalloc(sizeof(*dev->p), GFP_KERNEL);
if (!dev->p) {
WARN_ON(1);
return;
}
dev->p->device = dev;
dev->kobj.kset = devices_kset; dev->kobj.kset = devices_kset;
kobject_init(&dev->kobj, &device_ktype); kobject_init(&dev->kobj, &device_ktype);
klist_init(&dev->p->klist_children, klist_children_get, klist_init(&dev->klist_children, klist_children_get,
klist_children_put); klist_children_put);
INIT_LIST_HEAD(&dev->dma_pools); INIT_LIST_HEAD(&dev->dma_pools);
init_MUTEX(&dev->sem); init_MUTEX(&dev->sem);
@ -932,8 +922,7 @@ int device_add(struct device *dev)
kobject_uevent(&dev->kobj, KOBJ_ADD); kobject_uevent(&dev->kobj, KOBJ_ADD);
bus_attach_device(dev); bus_attach_device(dev);
if (parent) if (parent)
klist_add_tail(&dev->p->knode_parent, klist_add_tail(&dev->knode_parent, &parent->klist_children);
&parent->p->klist_children);
if (dev->class) { if (dev->class) {
mutex_lock(&dev->class->p->class_mutex); mutex_lock(&dev->class->p->class_mutex);
@ -1047,7 +1036,7 @@ void device_del(struct device *dev)
device_pm_remove(dev); device_pm_remove(dev);
dpm_sysfs_remove(dev); dpm_sysfs_remove(dev);
if (parent) if (parent)
klist_del(&dev->p->knode_parent); klist_del(&dev->knode_parent);
if (MAJOR(dev->devt)) { if (MAJOR(dev->devt)) {
device_remove_sys_dev_entry(dev); device_remove_sys_dev_entry(dev);
device_remove_file(dev, &devt_attr); device_remove_file(dev, &devt_attr);
@ -1108,14 +1097,7 @@ void device_unregister(struct device *dev)
static struct device *next_device(struct klist_iter *i) static struct device *next_device(struct klist_iter *i)
{ {
struct klist_node *n = klist_next(i); struct klist_node *n = klist_next(i);
struct device *dev = NULL; return n ? container_of(n, struct device, knode_parent) : NULL;
struct device_private *p;
if (n) {
p = to_device_private_parent(n);
dev = p->device;
}
return dev;
} }
/** /**
@ -1137,7 +1119,7 @@ int device_for_each_child(struct device *parent, void *data,
struct device *child; struct device *child;
int error = 0; int error = 0;
klist_iter_init(&parent->p->klist_children, &i); klist_iter_init(&parent->klist_children, &i);
while ((child = next_device(&i)) && !error) while ((child = next_device(&i)) && !error)
error = fn(child, data); error = fn(child, data);
klist_iter_exit(&i); klist_iter_exit(&i);
@ -1168,7 +1150,7 @@ struct device *device_find_child(struct device *parent, void *data,
if (!parent) if (!parent)
return NULL; return NULL;
klist_iter_init(&parent->p->klist_children, &i); klist_iter_init(&parent->klist_children, &i);
while ((child = next_device(&i))) while ((child = next_device(&i)))
if (match(child, data) && get_device(child)) if (match(child, data) && get_device(child))
break; break;
@ -1582,10 +1564,9 @@ int device_move(struct device *dev, struct device *new_parent)
old_parent = dev->parent; old_parent = dev->parent;
dev->parent = new_parent; dev->parent = new_parent;
if (old_parent) if (old_parent)
klist_remove(&dev->p->knode_parent); klist_remove(&dev->knode_parent);
if (new_parent) { if (new_parent) {
klist_add_tail(&dev->p->knode_parent, klist_add_tail(&dev->knode_parent, &new_parent->klist_children);
&new_parent->p->klist_children);
set_dev_node(dev, dev_to_node(new_parent)); set_dev_node(dev, dev_to_node(new_parent));
} }
@ -1597,11 +1578,11 @@ int device_move(struct device *dev, struct device *new_parent)
device_move_class_links(dev, new_parent, old_parent); device_move_class_links(dev, new_parent, old_parent);
if (!kobject_move(&dev->kobj, &old_parent->kobj)) { if (!kobject_move(&dev->kobj, &old_parent->kobj)) {
if (new_parent) if (new_parent)
klist_remove(&dev->p->knode_parent); klist_remove(&dev->knode_parent);
dev->parent = old_parent; dev->parent = old_parent;
if (old_parent) { if (old_parent) {
klist_add_tail(&dev->p->knode_parent, klist_add_tail(&dev->knode_parent,
&old_parent->p->klist_children); &old_parent->klist_children);
set_dev_node(dev, dev_to_node(old_parent)); set_dev_node(dev, dev_to_node(old_parent));
} }
} }

13
drivers/base/dd.c
View file

@ -28,7 +28,7 @@
static void driver_bound(struct device *dev) static void driver_bound(struct device *dev)
{ {
if (klist_node_attached(&dev->p->knode_driver)) { if (klist_node_attached(&dev->knode_driver)) {
printk(KERN_WARNING "%s: device %s already bound\n", printk(KERN_WARNING "%s: device %s already bound\n",
__func__, kobject_name(&dev->kobj)); __func__, kobject_name(&dev->kobj));
return; return;
@ -41,7 +41,7 @@ static void driver_bound(struct device *dev)
blocking_notifier_call_chain(&dev->bus->p->bus_notifier, blocking_notifier_call_chain(&dev->bus->p->bus_notifier,
BUS_NOTIFY_BOUND_DRIVER, dev); BUS_NOTIFY_BOUND_DRIVER, dev);
klist_add_tail(&dev->p->knode_driver, &dev->driver->p->klist_devices); klist_add_tail(&dev->knode_driver, &dev->driver->p->klist_devices);
} }
static int driver_sysfs_add(struct device *dev) static int driver_sysfs_add(struct device *dev)
@ -310,7 +310,7 @@ static void __device_release_driver(struct device *dev)
drv->remove(dev); drv->remove(dev);
devres_release_all(dev); devres_release_all(dev);
dev->driver = NULL; dev->driver = NULL;
klist_remove(&dev->p->knode_driver); klist_remove(&dev->knode_driver);
} }
} }
@ -340,7 +340,6 @@ EXPORT_SYMBOL_GPL(device_release_driver);
*/ */
void driver_detach(struct device_driver *drv) void driver_detach(struct device_driver *drv)
{ {
struct device_private *dev_prv;
struct device *dev; struct device *dev;
for (;;) { for (;;) {
@ -349,10 +348,8 @@ void driver_detach(struct device_driver *drv)
spin_unlock(&drv->p->klist_devices.k_lock); spin_unlock(&drv->p->klist_devices.k_lock);
break; break;
} }
dev_prv = list_entry(drv->p->klist_devices.k_list.prev, dev = list_entry(drv->p->klist_devices.k_list.prev,
struct device_private, struct device, knode_driver.n_node);
knode_driver.n_node);
dev = dev_prv->device;
get_device(dev); get_device(dev);
spin_unlock(&drv->p->klist_devices.k_lock); spin_unlock(&drv->p->klist_devices.k_lock);

13
drivers/base/driver.c
View file

@ -19,14 +19,7 @@
static struct device *next_device(struct klist_iter *i) static struct device *next_device(struct klist_iter *i)
{ {
struct klist_node *n = klist_next(i); struct klist_node *n = klist_next(i);
struct device *dev = NULL; return n ? container_of(n, struct device, knode_driver) : NULL;
struct device_private *dev_prv;
if (n) {
dev_prv = to_device_private_driver(n);
dev = dev_prv->device;
}
return dev;
} }
/** /**
@ -49,7 +42,7 @@ int driver_for_each_device(struct device_driver *drv, struct device *start,
return -EINVAL; return -EINVAL;
klist_iter_init_node(&drv->p->klist_devices, &i, klist_iter_init_node(&drv->p->klist_devices, &i,
start ? &start->p->knode_driver : NULL); start ? &start->knode_driver : NULL);
while ((dev = next_device(&i)) && !error) while ((dev = next_device(&i)) && !error)
error = fn(dev, data); error = fn(dev, data);
klist_iter_exit(&i); klist_iter_exit(&i);
@ -83,7 +76,7 @@ struct device *driver_find_device(struct device_driver *drv,
return NULL; return NULL;
klist_iter_init_node(&drv->p->klist_devices, &i, klist_iter_init_node(&drv->p->klist_devices, &i,
(start ? &start->p->knode_driver : NULL)); (start ? &start->knode_driver : NULL));
while ((dev = next_device(&i))) while ((dev = next_device(&i)))
if (match(dev, data) && get_device(dev)) if (match(dev, data) && get_device(dev))
break; break;

7
include/linux/device.h
View file

@ -28,7 +28,6 @@
#define BUS_ID_SIZE 20 #define BUS_ID_SIZE 20
struct device; struct device;
struct device_private;
struct device_driver; struct device_driver;
struct driver_private; struct driver_private;
struct class; struct class;
@ -366,10 +365,12 @@ struct device_dma_parameters {
}; };
struct device { struct device {
struct klist klist_children;
struct klist_node knode_parent; /* node in sibling list */
struct klist_node knode_driver;
struct klist_node knode_bus;
struct device *parent; struct device *parent;
struct device_private *p;
struct kobject kobj; struct kobject kobj;
char bus_id[BUS_ID_SIZE]; /* position on parent bus */ char bus_id[BUS_ID_SIZE]; /* position on parent bus */
unsigned uevent_suppress:1; unsigned uevent_suppress:1;