Re: [RFC] Sample kset/ktype/kobject implementation

Cornelia Huck
2007-11-28T16:35:56Z

On Tue, 27 Nov 2007 15:04:06 -0800,
Greg KH <greg@kroah.com> wrote:

> static struct foo_obj *create_foo_obj(const char *name)
> {
> struct foo_obj *foo;
> int retval;
>
> /* allocate the memory for the whole object */
> foo = kzalloc(sizeof(*foo), GFP_KERNEL);
> if (!foo)
> return NULL;
>
> /* initialize the kobject portion of the object properly */
> kobject_set_name(&foo->kobj, "%s", name);

Returncode not checked :)

> foo->kobj.kset = example_kset;
> foo->kobj.ktype = &foo_ktype;
>
> /*
> * Register the kobject with the kernel, all the default files will
> * be created here and the uevent will be sent out. If we were to
> * call kobject_init() and then kobject_add() we would be
> * responsible for sending out the initial KOBJ_ADD uevent.
> */
> retval = kobject_register(&foo->kobj);
> if (retval) {
> kfree(foo);

kobject_put(foo) is needed since it gets you through kobject_cleanup()
where the name can be freed.

> return NULL;
> }
>
> return foo;
> }