drm/i915: Use bound list for inactive shrink

Do to the move active/inactive lists, it no longer makes sense to use
them for shrinking, since shrinking isn't VM specific (such a need may
also exist, but doesn't yet).

What we can do instead is use the global bound list to find all objects
which aren't active.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/i915_gem.c

@@ -4635,7 +4635,6 @@ i915_gem_inactive_shrink(struct shrinker *shrinker, struct shrink_control *sc)
 			     struct drm_i915_private,
 			     mm.inactive_shrinker);
 	struct drm_device *dev = dev_priv->dev;
-	struct i915_address_space *vm = &dev_priv->gtt.base;
 	struct drm_i915_gem_object *obj;
 	int nr_to_scan = sc->nr_to_scan;
 	bool unlock = true;
@@ -4664,9 +4663,14 @@ i915_gem_inactive_shrink(struct shrinker *shrinker, struct shrink_control *sc)
 	list_for_each_entry(obj, &dev_priv->mm.unbound_list, global_list)
 		if (obj->pages_pin_count == 0)
 			cnt += obj->base.size >> PAGE_SHIFT;
-	list_for_each_entry(obj, &vm->inactive_list, mm_list)
+
+	list_for_each_entry(obj, &dev_priv->mm.bound_list, global_list) {
+		if (obj->active)
+			continue;
+
 		if (obj->pin_count == 0 && obj->pages_pin_count == 0)
 			cnt += obj->base.size >> PAGE_SHIFT;
+	}
 
 	if (unlock)
 		mutex_unlock(&dev->struct_mutex);