1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/channel_gk20a.h b/drivers/gpu/nvgpu/gk20a/channel_gk20a.h
index a028b6f3..263ca291 100644
--- a/drivers/gpu/nvgpu/gk20a/channel_gk20a.h
+++ b/drivers/gpu/nvgpu/gk20a/channel_gk20a.h
@@ -24,6 +24,7 @@
 #include <linux/mutex.h>
 #include <uapi/linux/nvgpu.h>
 #include <linux/poll.h>
+#include <linux/spinlock.h>
 
 struct gk20a;
 struct gr_gk20a;
@@ -162,6 +163,7 @@ struct channel_gk20a {
          * via schedule_work */
         void (*update_fn)(struct channel_gk20a *, void *);
         void *update_fn_data;
+        spinlock_t update_fn_lock; /* make access to the two above atomic */
         struct work_struct update_fn_work;
 };