+/*
+ * Helper for releasing extent buffer page.
+ */
+static void btrfs_release_extent_buffer_page(struct extent_buffer *eb,
+ unsigned long start_idx)
+{
+ unsigned long index;
+ struct page *page;
+
+ if (!eb->first_page)
+ return;
+
+ index = num_extent_pages(eb->start, eb->len);
+ if (start_idx >= index)
+ return;
+
+ do {
+ index--;
+ page = extent_buffer_page(eb, index);
+ if (page)
+ page_cache_release(page);
+ } while (index != start_idx);
+}
+
+/*
+ * Helper for releasing the extent buffer.
+ */
+static inline void btrfs_release_extent_buffer(struct extent_buffer *eb)
+{
+ btrfs_release_extent_buffer_page(eb, 0);
+ __free_extent_buffer(eb);
+}
+