class_stat_read
unsigned long obj_allocated = class_stat_read(class, ZS_OBJS_ALLOCATED);
unsigned long obj_used = class_stat_read(class, ZS_OBJS_INUSE);
inuse_totals[fg] += class_stat_read(class, fg);
seq_printf(s, "%9lu ", class_stat_read(class, fg));
obj_allocated = class_stat_read(class, ZS_OBJS_ALLOCATED);
obj_used = class_stat_read(class, ZS_OBJS_INUSE);