BLK_DRAIN_QUEUE(9) Block Devices BLK_DRAIN_QUEUE(9)
NAME blk_drain_queue - drain requests from request_queue
SYNOPSIS void blk_drain_queue(struct request_queue * q, bool drain_all);
ARGUMENTS q queue to drain
drain_all whether to drain all requests or only the ones w/ ELVPRIV
DESCRIPTION Drain requests from q. If drain_all is set, all requests are drained. If not, only ELVPRIV requests are drained. The caller is responsible for ensuring that no new requests which need to be drained are queued.
COPYRIGHT Kernel Hackers Manual 2.6. September 2014 BLK_DRAIN_QUEUE(9)