diff options
Diffstat (limited to 'include/linux/percpu_counter.h')
| -rw-r--r-- | include/linux/percpu_counter.h | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/include/linux/percpu_counter.h b/include/linux/percpu_counter.h index 8cb7c071bd5c..3a44dd1e33d2 100644 --- a/include/linux/percpu_counter.h +++ b/include/linux/percpu_counter.h @@ -198,14 +198,21 @@ static inline bool percpu_counter_limited_add(struct percpu_counter *fbc, s64 limit, s64 amount) { unsigned long flags; + bool good = false; s64 count; + if (amount == 0) + return true; + local_irq_save(flags); count = fbc->count + amount; - if (count <= limit) + if ((amount > 0 && count <= limit) || + (amount < 0 && count >= limit)) { fbc->count = count; + good = true; + } local_irq_restore(flags); - return count <= limit; + return good; } /* non-SMP percpu_counter_add_local is the same with percpu_counter_add */ |