- while ((entry = entry->prev) != &q->queue_head) {
- __rq = list_entry_rq(entry);
-
- if (__rq->flags & (REQ_SOFTBARRIER | REQ_HARDBARRIER))
- break;
- else if (__rq->flags & REQ_STARTED)
- break;
-
- if (!blk_fs_request(__rq))
- continue;
-
- if ((ret = elv_try_merge(__rq, bio))) {
- *req = __rq;
- q->last_merge = __rq;
- return ret;
- }
- }
-
- return ELEVATOR_NO_MERGE;