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-rw-r--r--block/blk-cgroup.c10
1 files changed, 4 insertions, 6 deletions
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index a25263ca39ca..c82c5dbf9187 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -744,7 +744,7 @@ struct blkg_rwstat blkg_rwstat_recursive_sum(struct blkcg_gq *blkg,
rcu_read_lock();
blkg_for_each_descendant_pre(pos_blkg, pos_css, blkg) {
- struct blkg_rwstat *rwstat, tmp;
+ struct blkg_rwstat *rwstat;
if (!pos_blkg->online)
continue;
@@ -754,12 +754,10 @@ struct blkg_rwstat blkg_rwstat_recursive_sum(struct blkcg_gq *blkg,
else
rwstat = (void *)pos_blkg + off;
- tmp = blkg_rwstat_read(rwstat);
-
for (i = 0; i < BLKG_RWSTAT_NR; i++)
- atomic64_add(atomic64_read(&tmp.aux_cnt[i]) +
- atomic64_read(&rwstat->aux_cnt[i]),
- &sum.aux_cnt[i]);
+ atomic64_add(atomic64_read(&rwstat->aux_cnt[i]) +
+ percpu_counter_sum_positive(&rwstat->cpu_cnt[i]),
+ &sum.aux_cnt[i]);
}
rcu_read_unlock();