[glommer-memcg:slab-common/kmalloc 3/16] mm/slab_common.c:210:6: warning: format '%td' expects argument of type 'ptrdiff_t', but argument 3 has type 'size_t'

[glommer-memcg:slab-common/kmalloc 3/16] mm/slab_common.c:210:6: warning: format '%td' expects argument of type 'ptrdiff_t', but argument 3 has type 'size_t'

[kbuild test robot]

tree:   git://git.kernel.org/pub/scm/linux/kernel/git/glommer/memcg.git slab-common/kmalloc
head:   b59d450914258587897b8b602068a840e26df19b
commit: b665ac5d4350e39e5ab017a3c9023323a35ba908 [3/16] CK2 [02/15] create common functions for boot slab creation
config: make ARCH=s390 allnoconfig

All warnings:

mm/slab_common.c: In function 'create_boot_cache':
mm/slab_common.c:210:6: warning: format '%td' expects argument of type 'ptrdiff_t', but argument 3 has type 'size_t' [-Wformat]

vim +210 mm/slab_common.c

97d06609 Christoph Lameter 2012-07-06  194  }
b665ac5d Christoph Lameter 2012-10-19  195  
b665ac5d Christoph Lameter 2012-10-19  196  #ifndef CONFIG_SLOB
b665ac5d Christoph Lameter 2012-10-19  197  /* Create a cache during boot when no slab services are available yet */
b665ac5d Christoph Lameter 2012-10-19  198  void __init create_boot_cache(struct kmem_cache *s, const char *name, size_t size,
b665ac5d Christoph Lameter 2012-10-19  199  		unsigned long flags)
b665ac5d Christoph Lameter 2012-10-19  200  {
b665ac5d Christoph Lameter 2012-10-19  201  	int err;
b665ac5d Christoph Lameter 2012-10-19  202  
b665ac5d Christoph Lameter 2012-10-19  203  	s->name = name;
b665ac5d Christoph Lameter 2012-10-19  204  	s->size = s->object_size = size;
b665ac5d Christoph Lameter 2012-10-19  205  	s->align = ARCH_KMALLOC_MINALIGN;
b665ac5d Christoph Lameter 2012-10-19  206  	err = __kmem_cache_create(s, flags);
b665ac5d Christoph Lameter 2012-10-19  207  
b665ac5d Christoph Lameter 2012-10-19  208  	if (err)
b665ac5d Christoph Lameter 2012-10-19  209  		panic("Creation of kmalloc slab %s size=%td failed. Reason %d\n",
b665ac5d Christoph Lameter 2012-10-19 @210  					name, size, err);
b665ac5d Christoph Lameter 2012-10-19  211  
b665ac5d Christoph Lameter 2012-10-19  212  	list_add(&s->list, &slab_caches);
b665ac5d Christoph Lameter 2012-10-19  213  	s->refcount = -1;	/* Exempt from merging for now */
b665ac5d Christoph Lameter 2012-10-19  214  }
b665ac5d Christoph Lameter 2012-10-19  215  
b665ac5d Christoph Lameter 2012-10-19  216  struct kmem_cache *__init create_kmalloc_cache(const char *name, size_t size,
b665ac5d Christoph Lameter 2012-10-19  217  				unsigned long flags)
b665ac5d Christoph Lameter 2012-10-19  218  {

---
0-DAY kernel build testing backend         Open Source Technology Center
Fengguang Wu, Yuanhan Liu                              Intel Corporation

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Re: [glommer-memcg:slab-common/kmalloc 3/16] mm/slab_common.c:210:6: warning: format '%td' expects argument of type 'ptrdiff_t', but argument 3 has type 'size_t'

[Christoph Lameter]

On Wed, 31 Oct 2012, kbuild test robot wrote:

> mm/slab_common.c: In function 'create_boot_cache':
> mm/slab_common.c:210:6: warning: format '%td' expects argument of type 'ptrdiff_t', but argument 3 has type 'size_t' [-Wformat]

Ok V5 will use %zd instead of %td for the size argument.

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