1 files changed, 5 insertions, 0 deletions

diff --git a/tools/perf/util/session.h b/tools/perf/util/session.h
index 1e0da9ca31aa..1dbef7cdd489 100644
--- a/tools/perf/util/session.h
+++ b/tools/perf/util/session.h
@@ -3,11 +3,16 @@
 
 #include "event.h"
 #include "header.h"
+#include <linux/rbtree.h>
+
+struct thread;
 
 struct perf_session {
         struct perf_header      header;
         unsigned long           size;
         unsigned long           mmap_window;
+        struct rb_root          threads;
+        struct thread           *last_match;
         int                     fd;
         int                     cwdlen;
         char                    *cwd;