From: Rusty Russell <rusty@rustcorp.com.au>
Subject: Re: [PATCH RFC V3 2/8] stop_machine: make stop_machine safe and efficient to call early
Date: Wed, 05 Oct 2011 11:45:25 +1030
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To: Jeremy Fitzhardinge <jeremy@goop.org>, Steven Rostedt <rostedt@goodmis.org>
Cc: "David S. Miller" <davem@davemloft.net>, David Daney <david.daney@cavium.com>, Michael Ellerman <michael@ellerman.id.au>, Jan Glauber <jang@linux.vnet.ibm.com>, Jason Baron <jbaron@redhat.com>, the arch/x86 maintainers <x86@kernel.org>, Xen Devel <xen-devel@lists.xensource.com>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>, Peter Zijlstra <a.p.zijlstra@chello.nl>, Andrew Morton <akpm@linux-foundation.org>, "H. Peter Anvin" <hpa@linux.intel.com>, Ingo Molnar <mingo@elte.hu>
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On Tue,  4 Oct 2011 12:18:03 -0700, Jeremy Fitzhardinge <jeremy@goop.org> wrote:
> From: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
> 
> Make stop_machine() safe to call early in boot, before stop_machine()
> has been set up, by simply calling the callback function directly if
> there's only one CPU online.

Not that you need this, since it's >90% Tejun's code now, but:

Acked-by: Rusty Russell <rusty@rustcorp.com.au>

Cheers,
Rusty.