diff --git a/init/Kconfig b/init/Kconfig
index d9d878a3bb46835e1f2c4301620975e05757ee1d..63d52a089a9e72a50b33c1b1bbf52c1e19b1769f 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -576,7 +576,7 @@ config SLUB
 	   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 b99b0ef2347e31e386eb69b7dc969eabee539296..b4899079d8b00e32660f8c36437c3b558bef4823 100644
--- a/mm/slob.c
+++ b/mm/slob.c
@@ -634,6 +634,14 @@ int kmem_ptr_validate(struct kmem_cache *a, const void *b)
 	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;
 }