The 'resize' callback is only called by bdrv_parent_cb_resize() which
is only called by bdrv_co_write_req_finish() to notify the parent(s)
that the child was resized.

Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
---
 include/block/block_int-common.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/block/block_int-common.h b/include/block/block_int-common.h
index 034c0634c8..8a3d427356 100644
--- a/include/block/block_int-common.h
+++ b/include/block/block_int-common.h
@@ -1020,6 +1020,9 @@ struct BdrvChildClass {
      * the I/O API.
      */
 
+    /*
+     * Notifies the parent that the child was resized.
+     */
     void (*resize)(BdrvChild *child);
 
     /*
-- 
2.47.2