+static void global_reset_lock(struct drm_i915_private *i915)
+{
+ struct intel_engine_cs *engine;
+ enum intel_engine_id id;
+
+ while (test_and_set_bit(I915_RESET_BACKOFF, &i915->gpu_error.flags))
+ wait_event(i915->gpu_error.reset_queue,
+ !test_bit(I915_RESET_BACKOFF,
+ &i915->gpu_error.flags));
+
+ for_each_engine(engine, i915, id) {
+ while (test_and_set_bit(I915_RESET_ENGINE + id,
+ &i915->gpu_error.flags))
+ wait_on_bit(&i915->gpu_error.flags,
+ I915_RESET_ENGINE + id,
+ TASK_UNINTERRUPTIBLE);
+ }
+}
+
+static void global_reset_unlock(struct drm_i915_private *i915)
+{
+ struct intel_engine_cs *engine;
+ enum intel_engine_id id;
+
+ for_each_engine(engine, i915, id)
+ clear_bit(I915_RESET_ENGINE + id, &i915->gpu_error.flags);
+
+ clear_bit(I915_RESET_BACKOFF, &i915->gpu_error.flags);
+ wake_up_all(&i915->gpu_error.reset_queue);
+}
+