CTR_OVERFLOWED     32 arch/x86/oprofile/op_model_amd.c #define CTR_OVERFLOWED(n) (!((n) & (1U<<31)))
CTR_OVERFLOWED     29 arch/x86/oprofile/op_model_ppro.c #define CTR_OVERFLOWED(n) (!((n) & (1U<<31)))