diff --git a/mm/slob.c b/mm/slob.c
index b99b0ef..b489907 100644
--- a/mm/slob.c
+++ b/mm/slob.c
@@ -634,6 +634,14 @@
 	return 0;
 }
 
+static unsigned int slob_ready __read_mostly;
+
+int slab_is_available(void)
+{
+	return slob_ready;
+}
+
 void __init kmem_cache_init(void)
 {
+	slob_ready = 1;
 }