linux-kernel - Re: [PATCH] powerpc: Only obtain cpu_hotplug

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Date:   Fri, 23 Jun 2017 14:13:32 +1000
From:   Michael Ellerman <mpe@...erman.id.au>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Thiago Jung Bauermann <bauerman@...ux.vnet.ibm.com>
Cc:     linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        John Allen <jallen@...ux.vnet.ibm.com>,
        Michael Bringmann <mwb@...ux.vnet.ibm.com>,
        Nathan Fontenot <nfont@...ux.vnet.ibm.com>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Subject: Re: [PATCH] powerpc: Only obtain cpu_hotplug_lock if called by rtasd

Thomas Gleixner <tglx@...utronix.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@...erman.id.au>

cheers