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

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Date:	Mon, 21 Jan 2008 11:38:38 +1100
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	Sam Ravnborg <sam@...nborg.org>
Cc:	Randy Dunlap <randy.dunlap@...cle.com>,
	lkml <linux-kernel@...r.kernel.org>, dipankar@...ibm.com,
	akpm <akpm@...ux-foundation.org>
Subject: Re: [PATCH] rcu: fix section mismatch

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.

But CONFIG_PM_SLEEP_SMP selects CONFIG_HOTPLUG_CPU, without requiring 
CONFIG_HOTPLUG: turning on SUSPEND or HIBERNATION does this.

Perhaps it's time to revisit reverse-depends for select?

Cheers,
Rusty.
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