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block: Mark bdrv_get_specific_info() and callers GRAPH_RDLOCK
This adds GRAPH_RDLOCK annotations to declare that callers of bdrv_get_specific_info() need to hold a reader lock for the graph. This removes an assume_graph_lock() call in vmdk's implementation. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Message-ID: <20230929145157.45443-20-kwolf@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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