[PATCH] powerpc: Only obtain cpu_hotplug_lock if called by rtasd

[Michael Ellerman]

Thomas Gleixner <tglx at linutronix.de> writes:

> On Thu, 22 Jun 2017, Thiago Jung Bauermann wrote:
>> Michael Bringmann provided this information:
>> >> It's not hard to backport both this patch and commit fe5595c07400
>> >> ("stop_machine: Provide stop_machine_cpuslocked()") from branch
>> >> smp/hotplug in tip.git for stable.
>> >
>> > Yeah but it's not really my business backporting that unfortunately.
>> 
>> Sorry, I wasn't clear. I was offering to provide backported patches for
>> the relevant stable branches.
>> 
>> Though that will only be necessary if we also backport the topology
>> fixes as well.
>
> So shall I pick up the fix and route it through tip smp/hotplug where the
> cpu hotplug core changes reside on which that patch depends on?

Yes please. Here's an ack if you like:

Acked-by: Michael Ellerman <mpe at ellerman.id.au>

cheers