There is a comment above the BDS definition stating care must be taken
to consider handling newly added fields in bdrv_append().

Actually, this comment should have said "bdrv_swap()" as of 4ddc07cac
(nine years ago), and in any case, bdrv_swap() was dropped in
8e419aefa (six years ago).  So no such care is necessary anymore.

Signed-off-by: Max Reitz <mreitz@redhat.com>
---
 include/block/block_int.h | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/include/block/block_int.h b/include/block/block_int.h
index 057d88b1fc..a8f9598102 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -832,12 +832,6 @@ struct BdrvChild {
     QLIST_ENTRY(BdrvChild) next_parent;
 };
 
-/*
- * Note: the function bdrv_append() copies and swaps contents of
- * BlockDriverStates, so if you add new fields to this struct, please
- * inspect bdrv_append() to determine if the new fields need to be
- * copied as well.
- */
 struct BlockDriverState {
     /* Protected by big QEMU lock or read-only after opening.  No special
      * locking needed during I/O...
-- 
2.31.1

On Thu, Jun 17, 2021 at 05:52:42PM +0200, Max Reitz wrote:
> There is a comment above the BDS definition stating care must be taken
> to consider handling newly added fields in bdrv_append().
> 
> Actually, this comment should have said "bdrv_swap()" as of 4ddc07cac
> (nine years ago), and in any case, bdrv_swap() was dropped in
> 8e419aefa (six years ago).  So no such care is necessary anymore.
> 
> Signed-off-by: Max Reitz <mreitz@redhat.com>
> ---
>  include/block/block_int.h | 6 ------
>  1 file changed, 6 deletions(-)

Reviewed-by: Eric Blake <eblake@redhat.com>

-- 
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
Virtualization:  qemu.org | libvirt.org

17.06.2021 18:52, Max Reitz wrote:
> There is a comment above the BDS definition stating care must be taken
> to consider handling newly added fields in bdrv_append().
> 
> Actually, this comment should have said "bdrv_swap()" as of 4ddc07cac
> (nine years ago), and in any case, bdrv_swap() was dropped in
> 8e419aefa (six years ago).  So no such care is necessary anymore.
> 
> Signed-off-by: Max Reitz<mreitz@redhat.com>

Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>

-- 
Best regards,
Vladimir