ttm_bo_lock_delayed_workqueue
resched = ttm_bo_lock_delayed_workqueue(&adev->mman.bdev);
int ttm_bo_lock_delayed_workqueue(struct ttm_bo_device *bdev);
resched = ttm_bo_lock_delayed_workqueue(&rdev->mman.bdev);
resched = ttm_bo_lock_delayed_workqueue(&rdev->mman.bdev);
EXPORT_SYMBOL(ttm_bo_lock_delayed_workqueue);