diff --git a/init/Kconfig b/init/Kconfig
index d9d878a..63d52a0 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -576,7 +576,7 @@
 	   and has enhanced diagnostics.
 
 config SLOB
-	depends on EMBEDDED && !SPARSEMEM
+	depends on EMBEDDED
 	bool "SLOB (Simple Allocator)"
 	help
 	   SLOB replaces the SLAB allocator with a drastically simpler
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;
 }