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Date: Mon, 1 Nov 2004 22:13:36 -0800
From: Andrew Morton <akpm@osdl.org>
To: Paul Mackerras <paulus@samba.org>
Cc: torvalds@osdl.org, nathanl@austin.ibm.com, anton@samba.org,
       linux-kernel@vger.kernel.org
Subject: Re: [PATCH] PPC64 mmu_context_init needs to run earlier
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Paul Mackerras <paulus@samba.org> wrote:
>
> This patch changes mmu_context_init to be called as a core_initcall
>  rather than an arch_initcall, since mmu_context_init needs to run
>  before we try to run any userspace processes, and arch_initcall was
>  found to be too late.

Here we go again...

I don't see why your patch fixes the problem.  do_basic_setup() calls
driver_init() prior to any initcalls being run, and driver_init() can call
/sbin/hotplug.