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[PATCH 12/13] cpu-hotplug: export cpu_hotplug_enable/cpu_hotplug_disable

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From: Vitaly Kuznetsov <vkuznets@redhat.com>

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>
---
 kernel/cpu.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/kernel/cpu.c b/kernel/cpu.c
index 1225fc2..18f00ae 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -194,6 +194,7 @@ void cpu_hotplug_disable(void)
 	cpu_hotplug_disabled++;
 	cpu_maps_update_done();
 }
+EXPORT_SYMBOL_GPL(cpu_hotplug_disable);
 
 void cpu_hotplug_enable(void)
 {
@@ -201,7 +202,7 @@ void cpu_hotplug_enable(void)
 	WARN_ON(--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? */
-- 
1.7.4.1

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Thread

[PATCH 00/13] Drivers: hv: vmbus: Miscellaneous fixes  "K. Y. Srinivasan" <kys@microsoft.com> - 2015-08-05 08:30 +0200
  [PATCH 08/13] Drivers: hv: vmbus: add a sysfs attr to show the binding of channel/VP "K. Y. Srinivasan" <kys@microsoft.com> - 2015-08-05 08:30 +0200
  RE: [PATCH 00/13] Drivers: hv: vmbus: Miscellaneous fixes  KY Srinivasan <kys@microsoft.com> - 2015-08-05 08:30 +0200
  [PATCH 13/13] Drivers: hv: vmbus: use cpu_hotplug_enable/disable "K. Y. Srinivasan" <kys@microsoft.com> - 2015-08-05 08:30 +0200
  [PATCH 11/13] cpu-hotplug: convert cpu_hotplug_disabled to a counter "K. Y. Srinivasan" <kys@microsoft.com> - 2015-08-05 08:30 +0200
  [PATCH 05/13] Drivers: hv_vmbus: Fix signal to host condition "K. Y. Srinivasan" <kys@microsoft.com> - 2015-08-05 08:40 +0200
  [PATCH 07/13] Drivers: hv: vmbus: Implement a clocksource based on the TSC page "K. Y. Srinivasan" <kys@microsoft.com> - 2015-08-05 08:40 +0200
  [PATCH 12/13] cpu-hotplug: export cpu_hotplug_enable/cpu_hotplug_disable "K. Y. Srinivasan" <kys@microsoft.com> - 2015-08-05 08:40 +0200
  [PATCH 01/13] drivers:hv: Modify hv_vmbus to search for all MMIO ranges available. "K. Y. Srinivasan" <kys@microsoft.com> - 2015-08-05 08:40 +0200
    [PATCH 03/13] Drivers: hv: vmbus: Improve the CPU affiliation for channels "K. Y. Srinivasan" <kys@microsoft.com> - 2015-08-05 08:40 +0200
    [PATCH 09/13] tools: hv: add a python script lsvmbus to list VMBus devices "K. Y. Srinivasan" <kys@microsoft.com> - 2015-08-05 09:00 +0200

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