Man page 9 : blk_execute_rq_nowait

blk_execute_rq_nowait - insert a request into queue for execution

void blk_execute_rq_nowait(struct request_queue *  q , struct gendisk *  bd_disk , struct request *  rq , int  at_head , rq_end_io_fn *  done );

q
    queue to insert the request in

bd_disk
    matching gendisk

rq
    request to insert

at_head
    insert request at head or tail of queue

done
    I/O completion handler

Insert a fully prepared request at the back of the I/O scheduler queue for execution. DonAqt wait for completion.

This function will invoke done directly if the queue is dead.