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-rw-r--r--kernel/events/internal.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/events/internal.h b/kernel/events/internal.h
index eb675c4d59df..ca6599723be5 100644
--- a/kernel/events/internal.h
+++ b/kernel/events/internal.h
@@ -31,6 +31,10 @@ struct ring_buffer {
 	spinlock_t			event_lock;
 	struct list_head		event_list;
 
+	atomic_t			mmap_count;
+	unsigned long			mmap_locked;
+	struct user_struct		*mmap_user;
+
 	struct perf_event_mmap_page	*user_page;
 	void				*data_pages[0];
 };