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authorSteven Rostedt <rostedt@goodmis.org>2008-07-10 20:58:10 -0400
committerIngo Molnar <mingo@elte.hu>2008-07-11 15:49:18 +0200
commit001b6767b1d0c89e458e5ddb039245b268f569fb (patch)
tree51d1135647957f9ad1a513103cdd3cfa11694cda /kernel
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>
Diffstat (limited to 'kernel')
-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 6b8bd8800d0..df840f42be3 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -216,8 +216,6 @@ void trace_function(struct trace_array *tr,
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_array *tr,
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,