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tracing: Do not create function tracer options when not compiled in

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When the function tracer is not compiled in, do not create the option files
for it.

Fix up both the sched_wakeup and irqsoff tracers to handle the change.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt (Red Hat) 2015-09-29 10:24:56 -04:00 • committed by Steven Rostedt
parent 4ee4301c4b
commit 8179e8a15b
4 changed files with 63 additions and 22 deletions
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28
kernel/trace/trace_irqsoff.c
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@ -31,7 +31,6 @@ enum {
static int trace_type __read_mostly;
static int save_flags;
static bool function_enabled;
static void stop_irqsoff_tracer(struct trace_array *tr, int graph);
static int start_irqsoff_tracer(struct trace_array *tr, int graph);
@ -249,21 +248,23 @@ __trace_function(struct trace_array *tr,
#else
#define __trace_function trace_function
#ifdef CONFIG_FUNCTION_TRACER
static int irqsoff_graph_entry(struct ftrace_graph_ent *trace)
{
return -1;
}
#endif
static enum print_line_t irqsoff_print_line(struct trace_iterator *iter)
{
return TRACE_TYPE_UNHANDLED;
}
static void irqsoff_graph_return(struct ftrace_graph_ret *trace) { }
static void irqsoff_trace_open(struct trace_iterator *iter) { }
static void irqsoff_trace_close(struct trace_iterator *iter) { }
#ifdef CONFIG_FUNCTION_TRACER
static void irqsoff_graph_return(struct ftrace_graph_ret *trace) { }
static void irqsoff_print_header(struct seq_file *s)
{
trace_default_header(s);
@ -507,6 +508,9 @@ void trace_preempt_off(unsigned long a0, unsigned long a1)
}
#endif /* CONFIG_PREEMPT_TRACER */
#ifdef CONFIG_FUNCTION_TRACER
static bool function_enabled;
static int register_irqsoff_function(struct trace_array *tr, int graph, int set)
{
int ret;
@ -540,21 +544,35 @@ static void unregister_irqsoff_function(struct trace_array *tr, int graph)
function_enabled = false;
}
static int irqsoff_function_set(struct trace_array *tr, int set)
static int irqsoff_function_set(struct trace_array *tr, u32 mask, int set)
{
if (!(mask & TRACE_ITER_FUNCTION))
return 0;
if (set)
register_irqsoff_function(tr, is_graph(), 1);
else
unregister_irqsoff_function(tr, is_graph());
return 1;
}
#else
static int register_irqsoff_function(struct trace_array *tr, int graph, int set)
{
return 0;
}
static void unregister_irqsoff_function(struct trace_array *tr, int graph) { }
static inline int irqsoff_function_set(struct trace_array *tr, u32 mask, int set)
{
return 0;
}
#endif /* CONFIG_FUNCTION_TRACER */
static int irqsoff_flag_changed(struct trace_array *tr, u32 mask, int set)
{
struct tracer *tracer = tr->current_trace;
if (mask & TRACE_ITER_FUNCTION)
return irqsoff_function_set(tr, set);
if (irqsoff_function_set(tr, mask, set))
return 0;
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
if (mask & TRACE_ITER_DISPLAY_GRAPH)