diff --git a/include/drm/drm_modeset_lock.h b/include/drm/drm_modeset_lock.h
index 75a5c45e21c72f2ca34da9f9ccb4d7e2908bd7e3..28931a23d96cd9ea1947f9b881e50cdb5e29a86b 100644
--- a/include/drm/drm_modeset_lock.h
+++ b/include/drm/drm_modeset_lock.h
@@ -33,6 +33,7 @@ struct drm_modeset_lock;
  * @ww_ctx: base acquire ctx
  * @contended: used internally for -EDEADLK handling
  * @locked: list of held locks
+ * @trylock_only: trylock mode used in atomic contexts/panic notifiers
  *
  * Each thread competing for a set of locks must use one acquire
  * ctx.  And if any lock fxn returns -EDEADLK, it must backoff and