Re: [PATCH: 002/017]Memory hotplug for new nodes v.4.(change nameold add_memory() to arch_add_memory())

From: Dave Hansen
Date: Fri Mar 17 2006 - 12:10:38 EST

On Fri, 2006-03-17 at 17:20 +0900, Yasunori Goto wrote:
> This patch changes name of old add_memory() to arch_add_memory.
> and use node id to get pgdat for the node at NODE_DATA().
> Note: Powerpc's old add_memory() is defined as __devinit. However,
> add_memory() is usually called only after bootup.
> I suppose it may be redundant. But, I'm not sure about powerpc.
> So, I keep it. (But, __meminit is better than __devinit at least.)

My thoughts when originally designing the API were that the architecture
may be the only bit that actually knows where the memory _is_. So, we
shouldn't involve the generic code in figuring this out.

You can see the result of this in the next patch because there is a new
function introduced to hide the arch-specific node lookup. If that was
simply done in the already arch-specific add_memory() function, then you
wouldn't need arch_nid_probe() and its related #ifdefs at all.

-- Dave

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