[VDO-5642][VDO-5644] dm vdo indexer: don't read request structure after enqueuing #86
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The function get_volume_page_protected may place a request on a queue for another thread to process asynchronously. When this happens, the volume should not read the request from the original thread. This can not currently cause problems, due to the way request processing is handled, but it is not safe in general.