Subject: Re: [PATCH v2 4/4] hotplug, powerpc, x86: Remove cpu_hotplug_driver_lock()

From: Toshi Kani <[email-masked]>
Date: Wed, 25 Sep 2013 14:44:59 -0600

On Wed, 2013-09-25 at 08:27 +0000, Rafael J. Wysocki wrote:
> Hi,
> 
> On Thursday, August 29, 2013 06:22:09 PM Toshi Kani wrote:
> > cpu_hotplug_driver_lock() serializes CPU online/offline operations
> > when ARCH_CPU_PROBE_RELEASE is set.  This lock interface is no longer
> > necessary with the following reason:
> > 
> >  - lock_device_hotplug() now protects CPU online/offline operations,
> >    including the probe & release interfaces enabled by
> >    ARCH_CPU_PROBE_RELEASE.  The use of cpu_hotplug_driver_lock() is
> >    redundant.
> >  - cpu_hotplug_driver_lock() is only valid when ARCH_CPU_PROBE_RELEASE
> >    is defined, which is misleading and is only enabled on powerpc.
> > 
> > This patch removes the cpu_hotplug_driver_lock() interface.  As
> > a result, ARCH_CPU_PROBE_RELEASE only enables / disables the cpu
> > probe & release interface as intended.  There is no functional change
> > in this patch.
> > 
> > Signed-off-by: Toshi Kani <[email-masked]>
> > Acked-by: Rafael J. Wysocki <[email-masked]>
> > Reviewed-by: Nathan Fontenot <[email-masked]>
> 
> Can you please rebase this patch on top of 3.12-rc2?  It doesn't apply for
> me any more.

Yes, I will send this patch on top of 3.12-rc2.

Thanks,
-Toshi