-/*
- * We assume I/O is going to the origin (which is the volume
- * more likely to have restrictions e.g. by being striped).
- * (Looking up the exact location of the data would be expensive
- * and could always be out of date by the time the bio is submitted.)
- */
-static int cache_bvec_merge(struct dm_target *ti,
- struct bvec_merge_data *bvm,
- struct bio_vec *biovec, int max_size)
-{
- struct cache *cache = ti->private;
- struct request_queue *q = bdev_get_queue(cache->origin_dev->bdev);
-
- if (!q->merge_bvec_fn)
- return max_size;
-
- bvm->bi_bdev = cache->origin_dev->bdev;
- return min(max_size, q->merge_bvec_fn(q, bvm, biovec));
-}
-