1 files changed, 3 insertions, 3 deletions

diff --git a/include/trace/events/writeback.h b/include/trace/events/writeback.h
index c7bbbe794e65..464ea82e10db 100644
--- a/include/trace/events/writeback.h
+++ b/include/trace/events/writeback.h
@@ -287,11 +287,11 @@ TRACE_EVENT(writeback_queue_io,
                 __field(int,            reason)
         ),
         TP_fast_assign(
-                unsigned long older_than_this = work->older_than_this;
+                unsigned long *older_than_this = work->older_than_this;
                 strncpy(__entry->name, dev_name(wb->bdi->dev), 32);
-                __entry->older  = older_than_this;
+                __entry->older  = older_than_this ?  *older_than_this : 0;
                 __entry->age    = older_than_this ?
-                                  (jiffies - older_than_this) * 1000 / HZ : -1;
+                                  (jiffies - *older_than_this) * 1000 / HZ : -1;
                 __entry->moved  = moved;
                 __entry->reason = work->reason;
         ),