include KERN_* constant in printk() calls in mm/slab.c

index 4cbac24..5a6e8c8 100644
@@ -2151,13 +2151,15 @@ kmem_cache_create (const char *name, size_t size, size_t align,
 		 */
 		res = probe_kernel_address(pc->name, tmp);
 		if (res) {
-			printk("SLAB: cache with size %d has lost its name\n",
+			printk(KERN_ERR
+			       "SLAB: cache with size %d has lost its name\n",
 			       pc->buffer_size);
 			continue;
 		}
 
 		if (!strcmp(pc->name, name)) {
-			printk("kmem_cache_create: duplicate cache %s\n", name);
+			printk(KERN_ERR
+			       "kmem_cache_create: duplicate cache %s\n", name);
 			dump_stack();
 			goto oops;
 		}

@@ -2294,7 +2296,8 @@ kmem_cache_create (const char *name, size_t size, size_t align,
 	left_over = calculate_slab_order(cachep, size, align, flags);
 
 	if (!cachep->num) {
-		printk("kmem_cache_create: couldn't create cache %s.\n", name);
+		printk(KERN_ERR
+		       "kmem_cache_create: couldn't create cache %s.\n", name);
 		kmem_cache_free(&cache_cache, cachep);
 		cachep = NULL;
 		goto oops;