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block: remove AIOCBInfo->get_aio_context()
The synchronous bdrv_aio_cancel() function needs the acb's AioContext so it can call aio_poll() to wait for cancellation. It turns out that all users run under the BQL in the main AioContext, so this callback is not needed. Remove the callback, mark bdrv_aio_cancel() GLOBAL_STATE_CODE just like its blk_aio_cancel() caller, and poll the main loop AioContext. The purpose of this cleanup is to identify bdrv_aio_cancel() as an API that does not work with the multi-queue block layer. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Message-ID: <20230823235938.1398382-2-stefanha@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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