1 files changed, 2 insertions, 0 deletions

diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index 471fdcc5df85..b0592bca6970 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -385,7 +385,9 @@ void blkiocg_update_timeslice_used(struct blkio_group *blkg, unsigned long time,
 
         spin_lock_irqsave(&blkg->stats_lock, flags);
         blkg->stats.time += time;
+#ifdef CONFIG_DEBUG_BLK_CGROUP
         blkg->stats.unaccounted_time += unaccounted_time;
+#endif
         spin_unlock_irqrestore(&blkg->stats_lock, flags);
 }
 EXPORT_SYMBOL_GPL(blkiocg_update_timeslice_used);