drm/ttm: consistently use reservation_object_unlock

Instead of having a confusing wrapper or call the underlying ww_mutex
function directly.
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-and-Tested-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/qxl/qxl_release.c

@@ -468,7 +468,7 @@ void qxl_release_fence_buffer_objects(struct qxl_release *release)
 
 		reservation_object_add_shared_fence(bo->resv, &release->base);
 		ttm_bo_add_to_lru(bo);
-		__ttm_bo_unreserve(bo);
+		reservation_object_unlock(bo->resv);
 	}
 	spin_unlock(&glob->lru_lock);
 	ww_acquire_fini(&release->ticket);

drivers/gpu/drm/ttm/ttm_bo.c

@@ -471,7 +471,7 @@ static void ttm_bo_cleanup_refs_or_queue(struct ttm_buffer_object *bo)
 			ttm_bo_add_to_lru(bo);
 		}
 
-		__ttm_bo_unreserve(bo);
+		reservation_object_unlock(bo->resv);
 	}
 	if (bo->resv != &bo->ttm_resv)
 		reservation_object_unlock(&bo->ttm_resv);
@@ -517,7 +517,8 @@ static int ttm_bo_cleanup_refs_and_unlock(struct ttm_buffer_object *bo,
 
 	if (ret && !no_wait_gpu) {
 		long lret;
-		ww_mutex_unlock(&bo->resv->lock);
+
+		reservation_object_unlock(bo->resv);
 		spin_unlock(&glob->lru_lock);
 
 		lret = reservation_object_wait_timeout_rcu(resv, true,
@@ -547,7 +548,7 @@ static int ttm_bo_cleanup_refs_and_unlock(struct ttm_buffer_object *bo,
 	}
 
 	if (ret || unlikely(list_empty(&bo->ddestroy))) {
-		__ttm_bo_unreserve(bo);
+		reservation_object_unlock(bo->resv);
 		spin_unlock(&glob->lru_lock);
 		return ret;
 	}
@@ -749,7 +750,7 @@ static int ttm_mem_evict_first(struct ttm_bo_device *bdev,
 
 			if (place && !bdev->driver->eviction_valuable(bo,
 								      place)) {
-				__ttm_bo_unreserve(bo);
+				reservation_object_unlock(bo->resv);
 				ret = -EBUSY;
 				continue;
 			}
@@ -1788,7 +1789,7 @@ static int ttm_bo_swapout(struct ttm_mem_shrink *shrink)
 	 * already swapped buffer.
 	 */
 
-	__ttm_bo_unreserve(bo);
+	reservation_object_unlock(bo->resv);
 	kref_put(&bo->list_kref, ttm_bo_release_list);
 	return ret;
 }
@@ -1825,7 +1826,7 @@ int ttm_bo_wait_unreserved(struct ttm_buffer_object *bo)
 	ret = __ttm_bo_reserve(bo, true, false, NULL);
 	if (unlikely(ret != 0))
 		goto out_unlock;
-	__ttm_bo_unreserve(bo);
+	reservation_object_unlock(bo->resv);
 
 out_unlock:
 	mutex_unlock(&bo->wu_mutex);

drivers/gpu/drm/ttm/ttm_execbuf_util.c

@@ -38,7 +38,7 @@ static void ttm_eu_backoff_reservation_reverse(struct list_head *list,
 	list_for_each_entry_continue_reverse(entry, list, head) {
 		struct ttm_buffer_object *bo = entry->bo;
 
-		__ttm_bo_unreserve(bo);
+		reservation_object_unlock(bo->resv);
 	}
 }
 
@@ -69,7 +69,7 @@ void ttm_eu_backoff_reservation(struct ww_acquire_ctx *ticket,
 		struct ttm_buffer_object *bo = entry->bo;
 
 		ttm_bo_add_to_lru(bo);
-		__ttm_bo_unreserve(bo);
+		reservation_object_unlock(bo->resv);
 	}
 	spin_unlock(&glob->lru_lock);
 
@@ -112,7 +112,7 @@ int ttm_eu_reserve_buffers(struct ww_acquire_ctx *ticket,
 
 		ret = __ttm_bo_reserve(bo, intr, (ticket == NULL), ticket);
 		if (!ret && unlikely(atomic_read(&bo->cpu_writers) > 0)) {
-			__ttm_bo_unreserve(bo);
+			reservation_object_unlock(bo->resv);
 
 			ret = -EBUSY;
 
@@ -203,7 +203,7 @@ void ttm_eu_fence_buffer_objects(struct ww_acquire_ctx *ticket,
 		else
 			reservation_object_add_excl_fence(bo->resv, fence);
 		ttm_bo_add_to_lru(bo);
-		__ttm_bo_unreserve(bo);
+		reservation_object_unlock(bo->resv);
 	}
 	spin_unlock(&glob->lru_lock);
 	if (ticket)

include/drm/ttm/ttm_bo_driver.h

@@ -940,18 +940,6 @@ static inline int ttm_bo_reserve_slowpath(struct ttm_buffer_object *bo,
 	return ret;
 }
 
-/**
- * __ttm_bo_unreserve
- * @bo: A pointer to a struct ttm_buffer_object.
- *
- * Unreserve a previous reservation of @bo where the buffer object is
- * already on lru lists.
- */
-static inline void __ttm_bo_unreserve(struct ttm_buffer_object *bo)
-{
-	ww_mutex_unlock(&bo->resv->lock);
-}
-
 /**
  * ttm_bo_unreserve
  *
@@ -966,7 +954,7 @@ static inline void ttm_bo_unreserve(struct ttm_buffer_object *bo)
 		ttm_bo_add_to_lru(bo);
 		spin_unlock(&bo->glob->lru_lock);
 	}
-	__ttm_bo_unreserve(bo);
+	reservation_object_unlock(bo->resv);
 }
 
 /**