From: "Denis V. Lunev" <d...@openvz.org>
All .bdrv_co_write_zeroes callbacks nowadays work perfectly even
with backing store attached. If future new callbacks would be unable to do
that - they have a chance to block this in bdrv_get_info().
Signed-off-by: Denis V. Lunev <d...@openvz.org>
Reviewed-by: Eric Blake <ebl...@redhat.com>
Reviewed-by: John Snow <js...@redhat.com>
Reviewed-by: Fam Zheng <f...@redhat.com>
Message-id: 1468503209-19498-6-git-send-email-...@openvz.org
CC: Stefan Hajnoczi <stefa...@redhat.com>
CC: Kevin Wolf <kw...@redhat.com>
CC: Max Reitz <mre...@redhat.com>
CC: Jeff Cody <jc...@redhat.com>
Signed-off-by: Jeff Cody <jc...@redhat.com>
---
block.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/block.c b/block.c
index d2dac3d..30d64e6 100644
--- a/block.c
+++ b/block.c
@@ -2837,7 +2837,7 @@ bool bdrv_can_write_zeroes_with_unmap(BlockDriverState
*bs)
{
BlockDriverInfo bdi;
- if (bs->backing || !(bs->open_flags & BDRV_O_UNMAP)) {
+ if (!(bs->open_flags & BDRV_O_UNMAP)) {
return false;
}
--
1.9.3
