trace_clock_ppc_tb   13 arch/powerpc/include/asm/trace_clock.h extern u64 notrace trace_clock_ppc_tb(void);
trace_clock_ppc_tb   15 arch/powerpc/include/asm/trace_clock.h #define ARCH_TRACE_CLOCKS { trace_clock_ppc_tb, "ppc-tb", 0 },