permit mempool_free(NULL)

[firefly-linux-kernel-4.4.55.git] / mm / mempool.c

diff --git a/mm/mempool.c b/mm/mempool.c
index cc1ca86dfc2496b6e0cae7703d4a6dc4f4f97150..3e8f1fed0e1f8accce8d9b931e59ba432ab92d53 100644 (file)
--- a/mm/mempool.c
+++ b/mm/mempool.c
@@ -263,6 +263,9 @@ void mempool_free(void *element, mempool_t *pool)
 {
        unsigned long flags;
 
+       if (unlikely(element == NULL))
+               return;
+
        smp_mb();
        if (pool->curr_nr < pool->min_nr) {
                spin_lock_irqsave(&pool->lock, flags);