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32a8aba37e
Instead of taking the writer lock internally, require callers to already hold it when calling bdrv_unref_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> Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-ID: <20230911094620.45040-21-kwolf@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>