PM_IFU             31 arch/powerpc/perf/power5+-pmu.c #define PM_IFU		2
PM_IFU             31 arch/powerpc/perf/power5-pmu.c #define PM_IFU		2
PM_IFU             30 arch/powerpc/perf/ppc970-pmu.c #define PM_IFU		4