diff --git a/mm/slab.c b/mm/slab.c
index 202465a193c11f30f90d07534e04f2ddfbc10b24..2e338a5f7b14c6d29216f4c54a74ef5259be01fa 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -4475,3 +4475,4 @@ size_t ksize(const void *objp)
 
 	return obj_size(virt_to_cache(objp));
 }
+EXPORT_SYMBOL(ksize);
diff --git a/mm/slob.c b/mm/slob.c
index 08a9bd91a1aaf517f1b17ff688fa9f612273f873..ee2ef8af0d43194536bb9e6744166c33002c8e9d 100644
--- a/mm/slob.c
+++ b/mm/slob.c
@@ -495,6 +495,7 @@ size_t ksize(const void *block)
 	else
 		return sp->page.private;
 }
+EXPORT_SYMBOL(ksize);
 
 struct kmem_cache {
 	unsigned int size, align;