linux-kernel - Re: mm: memory/cpu hotplug section mismatch.

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Message-Id: <20070612102236.E8BA.Y-GOTO@jp.fujitsu.com>
Date:	Tue, 12 Jun 2007 10:50:33 +0900
From:	Yasunori Goto <y-goto@...fujitsu.com>
To:	Sam Ravnborg <sam@...nborg.org>
Cc:	Paul Mundt <lethal@...ux-sh.org>,
	Randy Dunlap <randy.dunlap@...cle.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: mm: memory/cpu hotplug section mismatch.

> > 
> > If CONFIG_MEMORY_HOTPLUG=n __meminit == __init, and if
> > CONFIG_HOTPLUG_CPU=n __cpuinit == __init. However, with one set and the
> > other disabled, you end up with a reference between __init and a regular
> > non-init function.
> 
> My plan is to define dedicated sections for both __devinit and __meminit.
> Then we can apply the checks no matter the definition of CONFIG_HOTPLUG*

I prefer defining "__nodeinit" for __cpuinit and __meminit case to
__devinit.   __devinit is used many devices like I/O, and it is
useful for many desktop users. But, cpu/memory hotpluggable box
is very rare. And it should be in init section for many people.

This kind of issue is caused by initialization of pgdat/zone.
I think __nodeinit is enough and desirable.

Bye.

-- 
Yasunori Goto 


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