When CONFIG_FTRACE is not enabled, the tracing_start_functon_trace and tracing_stop_function_trace should be nops. Signed-off-by: Steven Rostedt --- kernel/trace/trace.h | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) Index: linux-tip.git/kernel/trace/trace.h =================================================================== --- linux-tip.git.orig/kernel/trace/trace.h 2008-06-26 14:58:55.000000000 -0400 +++ linux-tip.git/kernel/trace/trace.h 2008-06-30 22:39:15.000000000 -0400 @@ -216,8 +216,6 @@ void trace_function(struct trace_array * unsigned long parent_ip, unsigned long flags); -void tracing_start_function_trace(void); -void tracing_stop_function_trace(void); void tracing_start_cmdline_record(void); void tracing_stop_cmdline_record(void); int register_tracer(struct tracer *type); @@ -234,6 +232,14 @@ void update_max_tr_single(struct trace_a extern cycle_t ftrace_now(int cpu); +#ifdef CONFIG_FTRACE +void tracing_start_function_trace(void); +void tracing_stop_function_trace(void); +#else +# define tracing_start_function_trace() do { } while (0) +# define tracing_stop_function_trace() do { } while (0) +#endif + #ifdef CONFIG_CONTEXT_SWITCH_TRACER typedef void (*tracer_switch_func_t)(void *private, -- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/