SLAB_HWCACHE_ALIGN, NULL);
                if (!iova_cache) {
                        mutex_unlock(&iova_cache_mutex);
-                       printk(KERN_ERR "Couldn't create iova cache\n");
+                       pr_err("Couldn't create iova cache\n");
                        return -ENOMEM;
                }
        }
 
                new_iova = reserve_iova(to, iova->pfn_lo, iova->pfn_hi);
                if (!new_iova)
-                       printk(KERN_ERR "Reserve iova range %lx@%lx failed\n",
-                               iova->pfn_lo, iova->pfn_lo);
+                       pr_err("Reserve iova range %lx@%lx failed\n",
+                              iova->pfn_lo, iova->pfn_lo);
        }
        spin_unlock_irqrestore(&from->iova_rbtree_lock, flags);
 }