Hyper-V module needs to disable cpu hotplug (offlining) as there is no
support from hypervisor side to reassing 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>
---
kernel/cpu.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/kernel/cpu.c b/kernel/cpu.c
index 94bbe46..dc005e7 100644
--- 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? */
--
2.4.3
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