linux-kernel - Re: [PATCH] rcu: fix section mismatch

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Message-ID: <20080122055201.GA4810@uranus.ravnborg.org>
Date:	Tue, 22 Jan 2008 06:52:01 +0100
From:	Sam Ravnborg <sam@...nborg.org>
To:	Randy Dunlap <randy.dunlap@...cle.com>
Cc:	Rusty Russell <rusty@...tcorp.com.au>,
	lkml <linux-kernel@...r.kernel.org>, dipankar@...ibm.com,
	akpm <akpm@...ux-foundation.org>
Subject: Re: [PATCH] rcu: fix section mismatch

On Mon, Jan 21, 2008 at 03:34:09PM -0800, Randy Dunlap wrote:
> On Mon, 21 Jan 2008 11:38:38 +1100 Rusty Russell wrote:
> 
> > On Sunday 20 January 2008 08:25:49 Sam Ravnborg wrote:
> > > On Sat, Jan 19, 2008 at 11:56:43AM -0800, Randy Dunlap wrote:
> > > > rcu_online_cpu() should be __cpuinit instead of __devinit.
> > >
> > > So if we have:
> > > CONFIG_HOTPLUG=n
> > > CONFIG_HOTPLUG_CPU=y
> > >
> > > then this is a oops candidate.
> > 
> > At first glance, this can't happen because all CONFIG_HOTPLUG_CPU depends on 
> > CONFIG_HOTPLUG or selects it, for all archs.
> 
> Mostly, but arch/mips/ seems to be different (neither depends nor selects)
> unless it has changed very recently (I looked at 2.6.24-rc8).

mips has
	default n

So they at least try to turn off this feature.

	Sam
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