diff options
| -rw-r--r-- | include/linux/res_counter.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/include/linux/res_counter.h b/include/linux/res_counter.h index c9d625c..d06d014 100644 --- a/include/linux/res_counter.h +++ b/include/linux/res_counter.h @@ -142,7 +142,10 @@ static inline unsigned long long res_counter_margin(struct res_counter *cnt) unsigned long flags; spin_lock_irqsave(&cnt->lock, flags); - margin = cnt->limit - cnt->usage; + if (cnt->limit > cnt->usage) + margin = cnt->limit - cnt->usage; + else + margin = 0; spin_unlock_irqrestore(&cnt->lock, flags); return margin; } |