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tracing: Factorize the events profile accounting

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Factorize the events enabling accounting in a common tracing core
helper. This reduces the size of the profile_enable() and
profile_disable() callbacks for each trace events.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Acked-by: Li Zefan <lizf@cn.fujitsu.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Frederic Weisbecker
2009-09-18 00:54:43 +02:00
parent 0efb4d2072
commit e5e25cf47b
4 changed files with 36 additions and 40 deletions
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20
kernel/trace/trace_event_profile.c
View File

@@ -8,6 +8,14 @@
#include <linux/module.h>
#include "trace.h"
static int ftrace_profile_enable_event(struct ftrace_event_call *event)
{
if (atomic_inc_return(&event->profile_count))
return 0;
return event->profile_enable();
}
int ftrace_profile_enable(int event_id)
{
struct ftrace_event_call *event;
@@ -17,7 +25,7 @@ int ftrace_profile_enable(int event_id)
list_for_each_entry(event, &ftrace_events, list) {
if (event->id == event_id && event->profile_enable &&
try_module_get(event->mod)) {
ret = event->profile_enable(event);
ret = ftrace_profile_enable_event(event);
break;
}
}
@@ -26,6 +34,14 @@ int ftrace_profile_enable(int event_id)
return ret;
}
static void ftrace_profile_disable_event(struct ftrace_event_call *event)
{
if (!atomic_add_negative(-1, &event->profile_count))
return;
event->profile_disable();
}
void ftrace_profile_disable(int event_id)
{
struct ftrace_event_call *event;
@@ -33,7 +49,7 @@ void ftrace_profile_disable(int event_id)
mutex_lock(&event_mutex);
list_for_each_entry(event, &ftrace_events, list) {
if (event->id == event_id) {
event->profile_disable(event);
ftrace_profile_disable_event(event);
module_put(event->mod);
break;
}