blk_execute_rq — insert a request into queue for execution
intblk_execute_rq(
)
struct request_queue * q
queue to insert the request in
struct gendisk * bd_disk
matching gendisk
struct request * rq
request to insert
int at_head
insert request at head or tail of queue
Insert a fully prepared request at the back of the I/O scheduler queue for execution and wait for completion.