Messages in this thread | | | Date | Sat, 13 Mar 2004 20:10:17 -0800 | From | Andrew Morton <> | Subject | Re: [RFC] kref, a tiny, sane, reference count object |
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Nick Piggin <piggin@cyberone.com.au> wrote: > > > > Andrew Morton wrote: > > >Greg KH <greg@kroah.com> wrote: > > > >>For all of those people, this patch is for you. > >> > > > >It does rather neatly capture a common idiom. > > > > But as Andi said - look at all the crap involved when: > > atomic_inc(); > if (atomic_dec_and_test()) > release(); > Also neatly captures that idiom.
Well it does more than that, such as trapping the hard-to-diagnose bug of grabbing a refcount against a zero-ref object.
> And you get more flexibility by being able to use atomic_set > directly too.
Do I care about that? I care more about being able to say "ah, it uses kref. I understand that refcounting idiom, I know it's well debugged and I know that it traps common errors". That's better than "oh crap, this thing implements its own refcounting - I need to review it for the usual errors".
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