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-rw-r--r--lib/percpu_counter.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/lib/percpu_counter.c b/lib/percpu_counter.c
index 3b0ed80..3a59d84 100644
--- a/lib/percpu_counter.c
+++ b/lib/percpu_counter.c
@@ -68,21 +68,27 @@ s64 __percpu_counter_sum(struct percpu_counter *fbc)
}
EXPORT_SYMBOL(__percpu_counter_sum);
-void percpu_counter_init(struct percpu_counter *fbc, s64 amount)
+int percpu_counter_init(struct percpu_counter *fbc, s64 amount)
{
spin_lock_init(&fbc->lock);
fbc->count = amount;
fbc->counters = alloc_percpu(s32);
+ if (!fbc->counters)
+ return -ENOMEM;
#ifdef CONFIG_HOTPLUG_CPU
mutex_lock(&percpu_counters_lock);
list_add(&fbc->list, &percpu_counters);
mutex_unlock(&percpu_counters_lock);
#endif
+ return 0;
}
EXPORT_SYMBOL(percpu_counter_init);
void percpu_counter_destroy(struct percpu_counter *fbc)
{
+ if (!fbc->counters)
+ return;
+
free_percpu(fbc->counters);
#ifdef CONFIG_HOTPLUG_CPU
mutex_lock(&percpu_counters_lock);
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