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-rw-r--r--lib/percpu_counter.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/lib/percpu_counter.c b/lib/percpu_counter.c
index 119174494cb..4a8ba4bf5f6 100644
--- a/lib/percpu_counter.c
+++ b/lib/percpu_counter.c
@@ -52,7 +52,7 @@ EXPORT_SYMBOL(__percpu_counter_add);
* Add up all the per-cpu counts, return the result. This is a more accurate
* but much slower version of percpu_counter_read_positive()
*/
-s64 __percpu_counter_sum(struct percpu_counter *fbc)
+s64 __percpu_counter_sum(struct percpu_counter *fbc, int set)
{
s64 ret;
int cpu;
@@ -62,7 +62,12 @@ s64 __percpu_counter_sum(struct percpu_counter *fbc)
for_each_online_cpu(cpu) {
s32 *pcount = per_cpu_ptr(fbc->counters, cpu);
ret += *pcount;
+ if (set)
+ *pcount = 0;
}
+ if (set)
+ fbc->count = ret;
+
spin_unlock(&fbc->lock);
return ret;
}