@@ -2767,6 +2767,26 @@ struct request *blk_fetch_request(struct request_queue *q)
}
EXPORT_SYMBOL(blk_fetch_request);
+/*
+ * Steal bios from a request. The request must not have been partially
+ * completed before.
+ */
+void blk_steal_bios(struct bio_list *list, struct request *rq)
+{
+ if (rq->bio) {
+ if (list->tail)
+ list->tail->bi_next = rq->bio;
+ else
+ list->head = rq->bio;
+ list->tail = rq->biotail;
+ }
+
+ rq->bio = NULL;
+ rq->biotail = NULL;
+ rq->__data_len = 0;
+}
+EXPORT_SYMBOL_GPL(blk_steal_bios);
+
/**
* blk_update_request - Special helper function for request stacking drivers
* @req: the request being processed
@@ -1110,6 +1110,8 @@ extern struct request *blk_peek_request(struct request_queue *q);
extern void blk_start_request(struct request *rq);
extern struct request *blk_fetch_request(struct request_queue *q);
+void blk_steal_bios(struct bio_list *list, struct request *rq);
+
/*
* Request completion related functions.
*