1 files changed, 6 insertions, 1 deletions

diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index fa151d49a2ee..8d54e6d25eeb 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -544,6 +544,8 @@ struct perf_pending_entry {
         void (*func)(struct perf_pending_entry *);
 };
 
+typedef void (*perf_callback_t)(struct perf_event *, void *);
+
 /**
  * struct perf_event - performance event kernel representation:
  */
@@ -639,6 +641,8 @@ struct perf_event {
         struct event_filter             *filter;
 #endif
 
+        perf_callback_t                 callback;
+
 #endif /* CONFIG_PERF_EVENTS */
 };
 
@@ -748,7 +752,8 @@ extern int perf_event_release_kernel(struct perf_event *event);
 extern struct perf_event *
 perf_event_create_kernel_counter(struct perf_event_attr *attr,
                                 int cpu,
-                                pid_t pid);
+                                pid_t pid,
+                                perf_callback_t callback);
 extern u64 perf_event_read_value(struct perf_event *event);
 
 struct perf_sample_data {