- * RETURNS:
- * Returns NULL if no suitable node can be found. Otherwise, the best match
- * is returned. It's the caller's responsibility to make sure the node doesn't
- * get destroyed before the caller can access it.
- */
-struct drm_vma_offset_node *drm_vma_offset_lookup(struct drm_vma_offset_manager *mgr,
- unsigned long start,
- unsigned long pages)
-{
- struct drm_vma_offset_node *node;
-
- read_lock(&mgr->vm_lock);
- node = drm_vma_offset_lookup_locked(mgr, start, pages);
- read_unlock(&mgr->vm_lock);
-
- return node;
-}
-EXPORT_SYMBOL(drm_vma_offset_lookup);
-
-/**
- * drm_vma_offset_lookup_locked() - Find node in offset space
- * @mgr: Manager object
- * @start: Start address for object (page-based)
- * @pages: Size of object (page-based)
+ * Note that before lookup the vma offset manager lookup lock must be acquired
+ * with drm_vma_offset_lock_lookup(). See there for an example. This can then be
+ * used to implement weakly referenced lookups using kref_get_unless_zero().