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From: Keith Owens <kaos@ocs.com.au>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
cc: dwmw2@infradead.org (David Woodhouse), vojtech@suse.cz (Vojtech Pavlik),
        alan@redhat.com (Alan Cox), torvalds@transmeta.com (Linus Torvalds),
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH] Make agpsupport work with modversions 
In-Reply-To: Your message of "Sat, 28 Oct 2000 11:02:04 BST."
             <E13pSoP-0005Et-00@the-village.bc.nu> 
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Date: Sat, 28 Oct 2000 21:08:30 +1100
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On Sat, 28 Oct 2000 11:02:04 +0100 (BST), 
Alan Cox <alan@lxorguk.ukuu.org.uk> wrote:
>> of get_module_symbol this weekend.  The inter-object registration code
>> will allow two objects to pass data to each other, it will not matter
>> whether the objects are both modules, one module and one built in (in
>> either order) or both built in.  When modules are involved there will
>> be full module locking.
>
>Dont forget that one of the objects may not even be present, or may be
>loaded later.

How could I forget it?  You have defined the heart of the problem,
either object might be built into the kernel, might be a module or
might not even be there, in any case the load order is undefined.  That
is why existing code is kludging things by using get_module_symbol().
inter_module_register, unregister, get, put will solve the inter object
problem but using a clean interface that works with symbol versions.

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