From: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>
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@xxxxxxxxxx>
Reviewed-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: K. Y. Srinivasan <kys@xxxxxxxxxxxxx>
---
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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