motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-04 16:23:55 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

block: Mark bdrv_root_attach_child() GRAPH_WRLOCK

Browse source 
Instead of taking the writer lock internally, require callers to already
hold it when calling bdrv_root_attach_child(). These callers will
typically already hold the graph lock once the locking work is
completed, which means that they can't call functions that take it
internally.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-ID: <20231027155333.420094-5-kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Kevin Wolf 2023-10-27 17:53:13 +02:00
parent f5a3a270fe
commit 03b9eaca54
4 changed files with 12 additions and 10 deletions
Download patch file Download diff file Expand all files Collapse all files

5
block.c
View file

@ -3214,8 +3214,6 @@ BdrvChild *bdrv_root_attach_child(BlockDriverState *child_bs,
GLOBAL_STATE_CODE();
bdrv_graph_wrlock(child_bs);
child = bdrv_attach_child_common(child_bs, child_name, child_class,
child_role, perm, shared_perm, opaque,
tran, errp);
@ -3228,9 +3226,8 @@ BdrvChild *bdrv_root_attach_child(BlockDriverState *child_bs,
out:
tran_finalize(tran, ret);
bdrv_graph_wrunlock();
bdrv_unref(child_bs);
bdrv_schedule_unref(child_bs);
return ret < 0 ? NULL : child;
}