diff --git a/block/blk-ioc.c b/block/blk-ioc.c
index e34df7c..012f065 100644
--- a/block/blk-ioc.c
+++ b/block/blk-ioc.c
@@ -41,8 +41,8 @@
 		rcu_read_lock();
 		if (ioc->aic && ioc->aic->dtor)
 			ioc->aic->dtor(ioc->aic);
-		rcu_read_unlock();
 		cfq_dtor(ioc);
+		rcu_read_unlock();
 
 		kmem_cache_free(iocontext_cachep, ioc);
 		return 1;