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    SubjectRe: [RFC] New kobject/kset/ktype documentation and example code
    On Wed, Nov 28, 2007 at 05:09:50PM +0100, Cornelia Huck wrote:
    > On Wed, 28 Nov 2007 17:03:07 +0100,
    > Kay Sievers <kay.sievers@vrfy.org> wrote:
    >
    > > On Wed, 2007-11-28 at 16:52 +0100, Cornelia Huck wrote:
    > > > On Wed, 28 Nov 2007 13:35:54 +0100,
    > > > Kay Sievers <kay.sievers@vrfy.org> wrote:
    > > >
    > > > > On Wed, 2007-11-28 at 10:01 +0100, Cornelia Huck wrote:
    > > > > > On Tue, 27 Nov 2007 15:02:52 -0800, Greg KH <greg@kroah.com> wrote:
    > > > >
    > > > > > > Among other things, kobject_init() sets the kobject's reference count to
    > > > > > > one. Calling kobject_init() is not sufficient, however. Kobject users
    > > > > > > must, at a minimum, set the name of the kobject; this is the name that will
    > > > > > > be used in sysfs entries.
    > > > > >
    > > > > > Unless they don't register their kobject. (But they should always set a
    > > > > > name anyway to avoid funny debug messages, so it is probably a good
    > > > > > idea to call this a "must").
    > > > >
    > > > > Yeah, we should require it. And kobject_cleanup() needs to be called to
    > > > > free the allocated name, if the object is not already added and needs to
    > > > > be deleted (common in rewinding on error).
    > > >
    > > > Always using kobject_put() should take care of that.
    > >
    > > Ok, so we can always require a kobject_put() after a kobject_init(), to
    > > cleanup what happened after _init() and before _add()?
    >
    > That's a sensible requirement, I think.

    Yes, there are a few usages of unregistered kobjects in the kernel
    today, but I think that was people just not realizing they could use a
    simple kref instead. I'm working on cleaning them up right now...

    thanks,

    greg k-h
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