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由 Tejun Heo 提交于
mg_disk has at most single request in flight per device. Till now, whenever it needs to access the in-flight request it called elv_next_request(). This patch makes mg_disk track the in-flight request directly using mg_host->req and dequeue it when processing starts. q->queuedata is set to mg_host so that mg_host can be determined without fetching request from the queue. [ Impact: dequeue in-flight request, one elv_next_request() per request ] Signed-off-by: NTejun Heo <tj@kernel.org> Cc: unsik Kim <donari75@gmail.com> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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