blk_bio_list_merge
EXPORT_SYMBOL_GPL(blk_bio_list_merge);
if (blk_bio_list_merge(q, &ctx->rq_lists[type], bio, nr_segs))
bool blk_bio_list_merge(struct request_queue *q, struct list_head *list,
merged = blk_bio_list_merge(hctx->queue, rq_list, bio, nr_segs);