Messages in this thread Patch in this message | | | From | Vitaly Kuznetsov <> | Subject | [PATCH v7 2/3] cpu-hotplug: export cpu_hotplug_enable/cpu_hotplug_disable | Date | Thu, 23 Jul 2015 15:00:56 +0200 |
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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> --- Changes since v6: - fix a typo in description [Thomas Gleixner] --- kernel/cpu.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/kernel/cpu.c b/kernel/cpu.c index 0fca2ba..718ea76 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? */ -- 2.4.3
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