[anolis-intel-cloud:intel-6.6-DMR-APX-ANBZ29353 30/30] mm/slub.c:1904:1: warning: label 'find' defined but not used

[kernel test robot <lkp@intel.com>]

Hi Yi,

FYI, the error/warning still remains.

tree:   https://gitee.com/anolis/intel-cloud-kernel.git intel-6.6-DMR-APX-ANBZ29353
head:   d8e6957edead90297a4f8cb1f247c54e559dbf8c
commit: 0763da468566b4d9761378a01f42a36aa984d5d0 [30/30] anolis: mm: use oot_page_list to cache pages return to buddy
config: x86_64-allnoconfig (https://download.01.org/0day-ci/archive/20260224/202602241749.5SlObXRa-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.4.0-5) 12.4.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260224/202602241749.5SlObXRa-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202602241749.5SlObXRa-lkp@intel.com/

All warnings (new ones prefixed by >>):

   mm/slub.c: In function 'alloc_slab_page':
>> mm/slub.c:1904:1: warning: label 'find' defined but not used [-Wunused-label]
    1904 | find:
         | ^~~~
>> mm/slub.c:1874:13: warning: unused variable 'nid' [-Wunused-variable]
    1874 |         int nid;
         |             ^~~
>> mm/slub.c:1872:29: warning: unused variable 't' [-Wunused-variable]
    1872 |         struct slab *slab, *t;
         |                             ^


vim +/find +1904 mm/slub.c

  1864	
  1865	/*
  1866	 * Slab allocation and freeing
  1867	 */
  1868	static inline struct slab *alloc_slab_page(struct kmem_cache *s,
  1869			gfp_t flags, int node, struct kmem_cache_order_objects oo)
  1870	{
  1871		struct folio *folio;
> 1872		struct slab *slab, *t;
  1873		unsigned int order = oo_order(oo);
> 1874		int nid;
  1875	
  1876		flags |= __GFP_NOKFENCE;
  1877	
  1878	#ifdef CONFIG_MODULES
  1879		if (unlikely(s->is_oot)) {
  1880			spin_lock(&s->oot_lock);
  1881			list_for_each_entry_safe(slab, t, &s->oot_page_list, slab_list) {
  1882				nid = page_to_nid(&(slab_folio(slab)->page));
  1883				if (nid == node ||
  1884				   (node == NUMA_NO_NODE && nid == numa_node_id())) {
  1885					list_del(&slab->slab_list);
  1886					s->oot_page_num--;
  1887					spin_unlock(&s->oot_lock);
  1888					folio = slab_folio(slab);
  1889					goto find;
  1890				}
  1891			}
  1892			spin_unlock(&s->oot_lock);
  1893		}
  1894	#endif
  1895	
  1896		if (node == NUMA_NO_NODE)
  1897			folio = (struct folio *)alloc_pages(flags, order);
  1898		else
  1899			folio = (struct folio *)__alloc_pages_node(node, flags, order);
  1900	
  1901		if (!folio)
  1902			return NULL;
  1903	
> 1904	find:
  1905		slab = folio_slab(folio);
  1906		__folio_set_slab(folio);
  1907		/* Make the flag visible before any changes to folio->mapping */
  1908		smp_wmb();
  1909		if (folio_is_pfmemalloc(folio))
  1910			slab_set_pfmemalloc(slab);
  1911	
  1912		return slab;
  1913	}
  1914	

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