drivers/md/dm-zoned-metadata.c

1686 	struct dm_zone *dzone, *bzone;
1751 		bzone = dmz_get(zmd, bzone_id);
1752 		if (!bzone) {
1757 		if (!dmz_is_rnd(bzone) && !dmz_is_cache(bzone)) {
1763 		set_bit(DMZ_DATA, &bzone->flags);
1764 		set_bit(DMZ_BUF, &bzone->flags);
1765 		bzone->chunk = chunk;
1766 		bzone->bzone = dzone;
1767 		dzone->bzone = bzone;
1768 		dmz_get_zone_weight(zmd, bzone);
1769 		if (dmz_is_cache(bzone))
1770 			list_add_tail(&bzone->link, &zmd->map_cache_list);
1772 			list_add_tail(&bzone->link, &bzone->dev->map_rnd_list);
1875 	if (zone->bzone)
1876 		__dmz_lru_zone(zmd, zone->bzone);
1963 			dzone = zone->bzone;
1985 			dzone = zone->bzone;
2006 		if (!zone->bzone)
2131 	struct dm_zone *bzone;
2135 	bzone = dzone->bzone;
2136 	if (bzone) {
2137 		if (dmz_weight(bzone))
2138 			dmz_lru_zone(zmd, bzone);
2141 			dmz_unmap_zone(zmd, bzone);
2142 			dmz_free_zone(zmd, bzone);
2143 			bzone = NULL;
2149 	if (dmz_is_active(dzone) || bzone || dmz_weight(dzone))
2167 	struct dm_zone *bzone;
2172 	bzone = dzone->bzone;
2173 	if (bzone)
2177 	bzone = dmz_alloc_zone(zmd, 0, alloc_flags);
2178 	if (!bzone) {
2180 			bzone = ERR_PTR(-EIO);
2188 	dmz_set_chunk_mapping(zmd, dzone->chunk, dzone->id, bzone->id);
2190 	set_bit(DMZ_BUF, &bzone->flags);
2191 	bzone->chunk = dzone->chunk;
2192 	bzone->bzone = dzone;
2193 	dzone->bzone = bzone;
2194 	if (dmz_is_cache(bzone))
2195 		list_add_tail(&bzone->link, &zmd->map_cache_list);
2197 		list_add_tail(&bzone->link, &bzone->dev->map_rnd_list);
2201 	return bzone;
2346 		dzone_id = zone->bzone->id;
2347 		zone->bzone->bzone = NULL;
2348 		zone->bzone = NULL;
2355 		if (WARN_ON(zone->bzone)) {
2356 			zone->bzone->bzone = NULL;
2357 			zone->bzone = NULL;