1 files changed, 4 insertions, 1 deletions

diff --git a/tools/perf/util/session.h b/tools/perf/util/session.h
index 20b2c9cc834b..759d96022a39 100644
--- a/tools/perf/util/session.h
+++ b/tools/perf/util/session.h
@@ -16,10 +16,12 @@ struct perf_session {
         struct map_groups       kmaps;
         struct rb_root          threads;
         struct thread           *last_match;
+        struct rb_root          hists;
         int                     fd;
         int                     cwdlen;
         char                    *cwd;
         bool                    use_modules;
+        bool                    use_callchain;
         char filename[0];
 };
 
@@ -35,7 +37,8 @@ struct perf_event_ops {
         event_op        process_read_event;
         event_op        process_throttle_event;
         event_op        process_unthrottle_event;
-        int             (*sample_type_check)(u64 sample_type);
+        int             (*sample_type_check)(u64 sample_type,
+                                             struct perf_session *session);
         unsigned long   total_unknown;
         bool            full_paths;
 };