Re: [RFC] kref, a tiny, sane, reference count object
From: Andrew Morton
Date: Sat Mar 13 2004 - 19:36:34 EST
Greg KH <greg@xxxxxxxxx> wrote:
>
> For all of those people, this patch is for you.
It does rather neatly capture a common idiom.
> +struct kref * kref_get(struct kref *kref)
> +{
> + if (kref) {
> + WARN_ON(!atomic_read(&kref->refcount));
> + atomic_inc(&kref->refcount);
> + }
> + return kref;
> +}
Why is a NULL arg permitted here?
> +void kref_cleanup(struct kref *kref)
> +{
> + if (!kref)
> + return;
and here?
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