drivers/md/md-bitmap.c

641 	/* If cluster_slot is set, the cluster is setup */
642 	if (bitmap->cluster_slot >= 0) {
651 		offset = bitmap->cluster_slot * (bm_blocks << 3);
653 			bitmap->cluster_slot, offset);
738 	if (err == 0 && nodes && (bitmap->cluster_slot < 0)) {
747 		bitmap->cluster_slot = md_cluster_ops->slot_number(bitmap->mddev);
764 		if (bitmap->cluster_slot < 0)
958 		node_offset = bitmap->cluster_slot * store->file_pages;
989 		node_offset = bitmap->cluster_slot * store->file_pages;
1144 		node_offset = bitmap->cluster_slot * (DIV_ROUND_UP(store->bytes, PAGE_SIZE));
1817 		bitmap->cluster_slot == md_cluster_ops->slot_number(bitmap->mddev))
1910 	bitmap->cluster_slot = slot;
2189 					      ? bitmap->cluster_slot : 0);