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-rw-r--r--include/drm/drm_rect.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/drm/drm_rect.h b/include/drm/drm_rect.h
index 39f2deee709c..6f6e19bd4dac 100644
--- a/include/drm/drm_rect.h
+++ b/include/drm/drm_rect.h
@@ -39,6 +39,9 @@
* @x2: horizontal ending coordinate (exclusive)
* @y1: vertical starting coordinate (inclusive)
* @y2: vertical ending coordinate (exclusive)
+ *
+ * Note that this must match the layout of struct drm_mode_rect or the damage
+ * helpers like drm_atomic_helper_damage_iter_init() break.
*/
struct drm_rect {
int x1, y1, x2, y2;