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Date: Tue, 25 Jun 2013 13:45:31 -0700
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: "Srivatsa S. Bhat" <srivatsa.bhat@linux.vnet.ibm.com>
Cc: tglx@linutronix.de, peterz@infradead.org, tj@kernel.org, oleg@redhat.com,
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        netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
        devel@driverdev.osuosl.org, David Daney <david.daney@cavium.com>
Subject: Re: [PATCH v2 25/45] staging/octeon: Use
 get/put_online_cpus_atomic() to prevent CPU offline
Message-ID: <20130625204531.GA18272@kroah.com>
References: <20130625202452.16593.22810.stgit@srivatsabhat.in.ibm.com>
 <20130625203003.16593.38565.stgit@srivatsabhat.in.ibm.com>
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On Wed, Jun 26, 2013 at 02:00:04AM +0530, Srivatsa S. Bhat wrote:
> Once stop_machine() is gone from the CPU offline path, we won't be able
> to depend on disabling preemption 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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Cc: devel@driverdev.osuosl.org
> Acked-by: David Daney <david.daney@cavium.com>
> Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>

Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>