perf: Fix CPU hotplug
Since we have UP_PREPARE, we should also have UP_CANCELED. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: paulus <paulus@samba.org> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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