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Diffstat (limited to 'include/linux/res_counter.h')
-rw-r--r--include/linux/res_counter.h5
1 files changed, 4 insertions, 1 deletions
diff --git a/include/linux/res_counter.h b/include/linux/res_counter.h
index c9d625ca659e..d06d014afda6 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;
}