diff --git a/mm/slab.h b/mm/slab.h
index 43b7c5ababb5..3f49666e943c 100644
--- a/mm/slab.h
+++ b/mm/slab.h
@@ -411,6 +411,7 @@ extern void create_boot_cache(struct kmem_cache *, const char *name,
 			unsigned int useroffset, unsigned int usersize);
 
 int slab_unmergeable(struct kmem_cache *s);
+bool slab_args_unmergeable(struct kmem_cache_args *args, slab_flags_t flags);
 
 slab_flags_t kmem_cache_flags(slab_flags_t flags, const char *name);
 
diff --git a/mm/slab_common.c b/mm/slab_common.c
index 886d02fa94fb..094afa2792d0 100644
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -174,8 +174,7 @@ int slab_unmergeable(struct kmem_cache *s)
 	return 0;
 }
 
-static bool slab_args_unmergeable(struct kmem_cache_args *args,
-				  slab_flags_t flags)
+bool slab_args_unmergeable(struct kmem_cache_args *args, slab_flags_t flags)
 {
 	if (slab_nomerge)
 		return true;
diff --git a/mm/slub.c b/mm/slub.c
index 0805c09d4b55..18ac9460f9e9 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -8382,7 +8382,8 @@ static int calculate_sizes(struct kmem_cache_args *args, struct kmem_cache *s)
 	 */
 	aligned_size = ALIGN(size, s->align);
 #if defined(CONFIG_SLAB_OBJ_EXT) && defined(CONFIG_64BIT)
-	if (aligned_size - size >= sizeof(struct slabobj_ext))
+	if (slab_args_unmergeable(args, s->flags) &&
+			(aligned_size - size >= sizeof(struct slabobj_ext)))
 		s->flags |= SLAB_OBJ_EXT_IN_OBJ;
 #endif
 	size = aligned_size;