typedef void (blkcg_pol_offline_pd_fn)(struct blkg_policy_data *pd);
typedef void (blkcg_pol_free_pd_fn)(struct blkg_policy_data *pd);
typedef void (blkcg_pol_reset_pd_stats_fn)(struct blkg_policy_data *pd);
-typedef size_t (blkcg_pol_stat_pd_fn)(struct blkg_policy_data *pd, char *buf,
- size_t size);
+typedef bool (blkcg_pol_stat_pd_fn)(struct blkg_policy_data *pd,
+ struct seq_file *s);
struct blkcg_policy {
int plid;