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-rw-r--r--kernel/trace/trace_event_perf.c27
1 files changed, 6 insertions, 21 deletions
diff --git a/kernel/trace/trace_event_perf.c b/kernel/trace/trace_event_perf.c
index 8a2b73f..000e6e8 100644
--- a/kernel/trace/trace_event_perf.c
+++ b/kernel/trace/trace_event_perf.c
@@ -9,8 +9,6 @@
#include <linux/kprobes.h>
#include "trace.h"
-EXPORT_SYMBOL_GPL(perf_arch_fetch_caller_regs);
-
static char *perf_trace_buf[4];
/*
@@ -56,13 +54,7 @@ static int perf_trace_event_init(struct ftrace_event_call *tp_event,
}
}
- if (tp_event->class->reg)
- ret = tp_event->class->reg(tp_event, TRACE_REG_PERF_REGISTER);
- else
- ret = tracepoint_probe_register(tp_event->name,
- tp_event->class->perf_probe,
- tp_event);
-
+ ret = tp_event->class->reg(tp_event, TRACE_REG_PERF_REGISTER);
if (ret)
goto fail;
@@ -96,9 +88,7 @@ int perf_trace_init(struct perf_event *p_event)
mutex_lock(&event_mutex);
list_for_each_entry(tp_event, &ftrace_events, list) {
if (tp_event->event.type == event_id &&
- tp_event->class &&
- (tp_event->class->perf_probe ||
- tp_event->class->reg) &&
+ tp_event->class && tp_event->class->reg &&
try_module_get(tp_event->mod)) {
ret = perf_trace_event_init(tp_event, p_event);
break;
@@ -138,18 +128,13 @@ void perf_trace_destroy(struct perf_event *p_event)
if (--tp_event->perf_refcount > 0)
goto out;
- if (tp_event->class->reg)
- tp_event->class->reg(tp_event, TRACE_REG_PERF_UNREGISTER);
- else
- tracepoint_probe_unregister(tp_event->name,
- tp_event->class->perf_probe,
- tp_event);
+ tp_event->class->reg(tp_event, TRACE_REG_PERF_UNREGISTER);
/*
- * Ensure our callback won't be called anymore. See
- * tracepoint_probe_unregister() and __DO_TRACE().
+ * Ensure our callback won't be called anymore. The buffers
+ * will be freed after that.
*/
- synchronize_sched();
+ tracepoint_synchronize_unregister();
free_percpu(tp_event->perf_events);
tp_event->perf_events = NULL;
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