linux-kernel - Re: kobject

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Message-ID: <20071130103143.52d2bd2b@gondolin.boeblingen.de.ibm.com>
Date:	Fri, 30 Nov 2007 10:31:43 +0100
From:	Cornelia Huck <cornelia.huck@...ibm.com>
To:	Greg KH <greg@...ah.com>
Cc:	Kay Sievers <kay.sievers@...y.org>,
	Alan Stern <stern@...land.harvard.edu>,
	Kernel development list <linux-kernel@...r.kernel.org>,
	Jonathan Corbet <corbet@....net>,
	Randy Dunlap <randy.dunlap@...cle.com>
Subject: Re: kobject_init rewrite

On Thu, 29 Nov 2007 13:54:55 -0800,
Greg KH <greg@...ah.com> wrote:

> One minor documentation update:
> 
> > /**
> >  * kobject_init - initialize a kobject structure
> >  * @kobj: pointer to the kobject to initialize
> >  * @ktype: pointer to the ktype for this kobject.
> >  * @fmt: the name of the kobject
> >  *
> >  * This function will properly initialize a kobject such that it can then
> >  * be passed to the kobject_add() call.
> >  *
> >  * If the function returns an error, the memory allocated by the kobject
> >  * can be safely freed, no other functions need to be called.
> 
> If the function does not return an error, the only way the kobject's
> memory can be properly freed is with a call to kobject_put().  kfree()
> should never be called on a kobject after this function has been called,
> execept from the ktype's release function.
> 
> >  */
> > int kobject_init(struct kobject *kobj, struct kobj_type *ktype, const char *fmt, ...)
> > {
> > 	va_list args;
> > 	int retval;
> > 
> > 	if (!kobj)
> > 		return -EINVAL;
> > 
> > 	if (!ktype)
> > 		return -EINVAL;
> > 
> > 	WARN_ON(atomic_read(&kobj->kref.refcount));
> > 	kref_init(&kobj->kref);
> > 	INIT_LIST_HEAD(&kobj->entry);
> > 	kobj->ktype = ktype;
> > 
> > 	va_start(args, fmt);
> > 	retval = kobject_set_name_vargs(kobj, fmt, args);
> > 	va_end(args);
> > 
> > 	return retval;
> > }
> > 

Yes, this looks fine.
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