pd_stat_fn 986 block/blk-cgroup.c if (!blkg->pd[i] || !pol->pd_stat_fn) pd_stat_fn 989 block/blk-cgroup.c written = pol->pd_stat_fn(blkg->pd[i], buf+off, size-off); pd_stat_fn 1038 block/blk-iolatency.c .pd_stat_fn = iolatency_pd_stat, pd_stat_fn 180 include/linux/blk-cgroup.h blkcg_pol_stat_pd_fn *pd_stat_fn;