Re: [PATCH v6 33/46] cris/smp: Use get/put_online_cpus_atomic() toprevent CPU offline

From: Jesper Nilsson
Date: Mon Feb 18 2013 - 08:07:23 EST

On Mon, Feb 18, 2013 at 06:12:54PM +0530, Srivatsa S. Bhat wrote:
> Once stop_machine() is gone from the CPU offline path, we won't be able to
> depend on preempt_disable() or local_irq_disable() to prevent CPUs from
> going offline from under us.
> Use the get/put_online_cpus_atomic() APIs to prevent CPUs from going offline,
> while invoking from atomic context.
> Cc: Mikael Starvik <starvik@xxxxxxxx>

> Cc: linux-cris-kernel@xxxxxxxx
> Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@xxxxxxxxxxxxxxxxxx>

Acked-by: Jesper Nilsson <jesper.nilsson@xxxxxxxx>

/^JN - Jesper Nilsson
Jesper Nilsson -- jesper.nilsson@xxxxxxxx
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