Re: [PATCH v6 0/4] Add full zoned storage emulation to qcow2 driver

[Sam Li]

Markus Armbruster <armbru@redhat.com> 于2023年11月30日周四 09:25写道：
>
> Clang reports
>
> ../block/qcow2.c:4066:5: error: mutex 'graph_lock' is not held on every path 
> through here [-Werror,-Wthread-safety-analysis]
>     blk_co_unref(blk);
>     ^
> ../block/qcow2.c:3928:5: note: mutex acquired here
>     bdrv_graph_co_rdlock();
>     ^
> ../block/qcow2.c:4066:5: error: mutex 'graph_lock' is not held on every path 
> through here [-Werror,-Wthread-safety-analysis]
>     blk_co_unref(blk);
>     ^
> ../block/qcow2.c:3928:5: note: mutex acquired here
>     bdrv_graph_co_rdlock();
>     ^
> 2 errors generated.
>

Turns out that my gcc 12.0 does not support -Wthread-safety-analysis
flag. Need to use --cc=clang to reproduce it. Thanks!

Sam