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authorSteven Rostedt <rostedt@goodmis.org>2008-07-10 20:58:10 -0400
committerIngo Molnar <mingo@elte.hu>2008-07-11 09:49:18 -0400
commit001b6767b1d0c89e458e5ddb039245b268f569fb (patch)
tree51d1135647957f9ad1a513103cdd3cfa11694cda
parent007c05d4d2ce42fabd58cb54ed98e0a1714d9d86 (diff)
ftrace: define function trace nop
When CONFIG_FTRACE is not enabled, the tracing_start_functon_trace and tracing_stop_function_trace should be nops. Signed-off-by: Steven Rostedt <srostedt@redhat.com> Cc: Steven Rostedt <srostedt@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
-rw-r--r--kernel/trace/trace.h10
1 files changed, 8 insertions, 2 deletions
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 6b8bd8800d04..df840f42be39 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -216,8 +216,6 @@ void trace_function(struct trace_array *tr,
216 unsigned long parent_ip, 216 unsigned long parent_ip,
217 unsigned long flags); 217 unsigned long flags);
218 218
219void tracing_start_function_trace(void);
220void tracing_stop_function_trace(void);
221void tracing_start_cmdline_record(void); 219void tracing_start_cmdline_record(void);
222void tracing_stop_cmdline_record(void); 220void tracing_stop_cmdline_record(void);
223int register_tracer(struct tracer *type); 221int register_tracer(struct tracer *type);
@@ -234,6 +232,14 @@ void update_max_tr_single(struct trace_array *tr,
234 232
235extern cycle_t ftrace_now(int cpu); 233extern cycle_t ftrace_now(int cpu);
236 234
235#ifdef CONFIG_FTRACE
236void tracing_start_function_trace(void);
237void tracing_stop_function_trace(void);
238#else
239# define tracing_start_function_trace() do { } while (0)
240# define tracing_stop_function_trace() do { } while (0)
241#endif
242
237#ifdef CONFIG_CONTEXT_SWITCH_TRACER 243#ifdef CONFIG_CONTEXT_SWITCH_TRACER
238typedef void 244typedef void
239(*tracer_switch_func_t)(void *private, 245(*tracer_switch_func_t)(void *private,