i915_gem_active_isset
GEM_BUG_ON(i915_gem_active_isset(&engine->timeline.last_request));
if (i915_gem_active_isset(&active->base)) {
if (!i915_gem_active_isset(active) && !vma->active_count++) {
GEM_BUG_ON(i915_gem_active_isset(&vma->last_fence));
GEM_BUG_ON(i915_gem_active_isset(&iter->base));