diff --git a/include/hardware/gralloc.h b/include/hardware/gralloc.h
index 84834aa..f4fc215 100644
--- a/include/hardware/gralloc.h
+++ b/include/hardware/gralloc.h
@@ -229,7 +229,13 @@
     int (*free)(struct alloc_device_t* dev,
             buffer_handle_t handle);
 
-    void* reserved_proc[8];
+    /* This hook is OPTIONAL.
+     *
+     * If non NULL it will be caused by SurfaceFlinger on dumpsys
+     */
+    void (*dump)(struct alloc_device_t *dev, char *buff, int buff_len);
+
+    void* reserved_proc[7];
 } alloc_device_t;
 
 
@@ -324,8 +330,14 @@
 
     int (*compositionComplete)(struct framebuffer_device_t* dev);
 
+    /*
+     * This hook is OPTIONAL.
+     *
+     * If non NULL it will be caused by SurfaceFlinger on dumpsys
+     */
+    void (*dump)(struct framebuffer_device_t* dev, char *buff, int buff_len);
 
-    void* reserved_proc[8];
+    void* reserved_proc[7];
 
 } framebuffer_device_t;
 
diff --git a/include/hardware/hwcomposer.h b/include/hardware/hwcomposer.h
index c72d466..321dfc1 100644
--- a/include/hardware/hwcomposer.h
+++ b/include/hardware/hwcomposer.h
@@ -278,8 +278,14 @@
                 hwc_display_t dpy,
                 hwc_surface_t sur,
                 hwc_layer_list_t* list);
+    /*
+     * This hook is OPTIONAL.
+     *
+     * If non NULL it will be caused by SurfaceFlinger on dumpsys
+     */
+    void (*dump)(struct hwc_composer_device* dev, char *buff, int buff_len);
 
-    void* reserved_proc[8];
+    void* reserved_proc[7];
 
 } hwc_composer_device_t;