[PATCH 2/4] hotplug, x86: Add hotplug lock to missing places

[Greg KH]

On Sat, Aug 17, 2013 at 01:46:57PM -0600, Toshi Kani wrote:
> lock_device_hotplug() serializes CPU & Memory online/offline and hotplug
> operations.  However, this lock is not held in the debug interfaces below
> that initiate CPU online/offline operations.
> 
>  - _debug_hotplug_cpu(), cpu0 hotplug test interface enabled by
>    CONFIG_DEBUG_HOTPLUG_CPU0.
>  - cpu_probe_store() and cpu_release_store(), cpu hotplug test interface
>    enabled by CONFIG_ARCH_CPU_PROBE_RELEASE.
> 
> This patch changes the above interfaces to hold lock_device_hotplug().
> 
> Signed-off-by: Toshi Kani <toshi.kani at hp.com>
> ---
>  arch/x86/kernel/topology.c |    2 ++
>  drivers/base/cpu.c         |   16 ++++++++++++++--
>  2 files changed, 16 insertions(+), 2 deletions(-)

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