+ /* The i915 workqueue is primarily used for batched retirement of
+ * requests (and thus managing bo) once the task has been completed
+ * by the GPU. i915_gem_retire_requests() is called directly when we
+ * need high-priority retirement, such as waiting for an explicit
+ * bo.
+ *
+ * It is also used for periodic low-priority events, such as
+ * idle-timers and hangcheck.
+ *
+ * All tasks on the workqueue are expected to acquire the dev mutex
+ * so there is no point in running more than one instance of the
+ * workqueue at any time: max_active = 1 and NON_REENTRANT.
+ */
+ dev_priv->wq = alloc_workqueue("i915",
+ WQ_UNBOUND | WQ_NON_REENTRANT,
+ 1);