kmem_ptr_validate 3632 mm/slab.c      int kmem_ptr_validate(struct kmem_cache *cachep, const void *ptr)
kmem_ptr_validate  632 mm/slob.c      int kmem_ptr_validate(struct kmem_cache *a, const void *b)
kmem_ptr_validate 2336 mm/slub.c      int kmem_ptr_validate(struct kmem_cache *s, const void *object)