dirty_map
struct dirty_map dmap[2];
struct dirty_map *current_dmap;
struct dirty_map *committing_dmap;
static int __dirty_map_init(struct dirty_map *dmap, unsigned long nr_words,
static void __dirty_map_exit(struct dirty_map *dmap)
static int __flush_dmap(struct dm_clone_metadata *cmd, struct dirty_map *dmap)
struct dirty_map *dmap, *next_dmap;
struct dirty_map *dmap;
struct dirty_map *dmap;