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

[Markus Armbruster]

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.