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This patch adds the powernv_throttle tracepoint to trace the CPU frequency throttling event, which is used by the powernv-cpufreq driver in POWER8. Signed-off-by: Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com> Reviewed-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>