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| author | Greg Kroah-Hartman <gregkh@suse.de> | 2008-12-16 12:23:36 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-01-06 10:44:32 -0800 |
| commit | 2831fe6f9cc4e16c103504ee09a47a084297c0f3 (patch) | |
| tree | 36869b2a4ad9dce0fb0812f44355233e907afa95 /drivers/base | |
| parent | 2e5ba26a483218b51b7b327fb235b348890aea15 (diff) | |
| download | lwn-2831fe6f9cc4e16c103504ee09a47a084297c0f3.tar.gz lwn-2831fe6f9cc4e16c103504ee09a47a084297c0f3.zip | |
driver core: create a private portion of struct device
This is to be used to move things out of struct device that no code
outside of the driver core should ever touch.
Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/base.h | 12 | ||||
| -rw-r--r-- | drivers/base/core.c | 8 |
2 files changed, 20 insertions, 0 deletions
diff --git a/drivers/base/base.h b/drivers/base/base.h index 0a5f055dffba..6b20809b5fd4 100644 --- a/drivers/base/base.h +++ b/drivers/base/base.h @@ -63,6 +63,18 @@ struct class_private { #define to_class(obj) \ 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. + * + * @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 device *device; +}; + /* initialisation functions */ extern int devices_init(void); extern int buses_init(void); diff --git a/drivers/base/core.c b/drivers/base/core.c index 14aa2b6953c9..6657787e64f8 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -109,6 +109,7 @@ static struct sysfs_ops dev_sysfs_ops = { static void device_release(struct kobject *kobj) { struct device *dev = to_dev(kobj); + struct device_private *p = dev->p; if (dev->release) dev->release(dev); @@ -120,6 +121,7 @@ static void device_release(struct kobject *kobj) WARN(1, KERN_ERR "Device '%s' does not have a release() " "function, it is broken and must be fixed.\n", dev_name(dev)); + kfree(p); } static struct kobj_type device_ktype = { @@ -536,6 +538,12 @@ static void klist_children_put(struct klist_node *n) */ 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; kobject_init(&dev->kobj, &device_ktype); klist_init(&dev->klist_children, klist_children_get, |