cpu-hotplug: export cpu_hotplug_enable/cpu_hotplug_disable

Hyper-V module needs to disable cpu hotplug (offlining) as there is no
support from hypervisor side to reassign already opened event channels
to a different CPU. Currently it is been done by altering
smp_ops.cpu_disable but it is hackish.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 32145c4677d2c46b9d877a33ae82c6fcacd002f9)

As hv driver depends on it
Orabug: 21886720
Signed-off-by: Jason Luo <zhangqing.luo@oracle.com>

diff --git a/kernel/cpu.c b/kernel/cpu.c
index 94bbe4695232cd2fa2e9c0def32de7fa27644971..dc005e7036fa59c7501f91730ecf88ff36e8a5e2 100644 (file)
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -193,6 +193,7 @@ void cpu_hotplug_disable(void)
        cpu_hotplug_disabled = 1;
        cpu_maps_update_done();
 }
+EXPORT_SYMBOL_GPL(cpu_hotplug_disable);
 
 void cpu_hotplug_enable(void)
 {
@@ -200,7 +201,7 @@ void cpu_hotplug_enable(void)
        cpu_hotplug_disabled = 0;
        cpu_maps_update_done();
 }
-
+EXPORT_SYMBOL_GPL(cpu_hotplug_enable);
 #endif /* CONFIG_HOTPLUG_CPU */
 
 /* Need to know about CPUs going up/down? */