mm/swapfile.c:453:6: warning: unused variable 'ret'

mm/swapfile.c:453:6: warning: unused variable 'ret'

[kernel test robot]

tree:   https://github.com/intel-lab-lkp/linux/commits/Kairui-Song-via-B4-Relay/mm-swap-simplify-swap-cache-allocation-helper/20260515-182232
head:   0c9b851d54d8858aefdd082f59e488eeaa4c6f6f
commit: 0c9b851d54d8858aefdd082f59e488eeaa4c6f6f mm, swap: merge zeromap into swap table
date:   12 hours ago
config: x86_64-kexec (https://download.01.org/0day-ci/archive/20260516/202605160059.RigLlGEw-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260516/202605160059.RigLlGEw-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/202605160059.RigLlGEw-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> mm/swapfile.c:453:6: warning: unused variable 'ret' [-Wunused-variable]
     453 |         int ret = 0;
         |             ^~~
   1 warning generated.


vim +/ret +453 mm/swapfile.c

16dc0672038592 Kairui Song 2026-05-15  448  
16dc0672038592 Kairui Song 2026-05-15  449  static int swap_cluster_alloc_table(struct swap_cluster_info *ci, gfp_t gfp)
16dc0672038592 Kairui Song 2026-05-15  450  {
16dc0672038592 Kairui Song 2026-05-15  451  	struct swap_table *table = NULL;
16dc0672038592 Kairui Song 2026-05-15  452  	struct folio *folio;
d029b4aa29fcfc Kairui Song 2026-05-15 @453  	int ret = 0;
16dc0672038592 Kairui Song 2026-05-15  454  
16dc0672038592 Kairui Song 2026-05-15  455  	/* The cluster must be empty and not on any list during allocation. */
16dc0672038592 Kairui Song 2026-05-15  456  	VM_WARN_ON_ONCE(ci->flags || !cluster_is_empty(ci));
16dc0672038592 Kairui Song 2026-05-15  457  	if (rcu_access_pointer(ci->table))
16dc0672038592 Kairui Song 2026-05-15  458  		return 0;
16dc0672038592 Kairui Song 2026-05-15  459  
16dc0672038592 Kairui Song 2026-05-15  460  	if (SWP_TABLE_USE_PAGE) {
16dc0672038592 Kairui Song 2026-05-15  461  		folio = folio_alloc(gfp | __GFP_ZERO, 0);
16dc0672038592 Kairui Song 2026-05-15  462  		if (folio)
16dc0672038592 Kairui Song 2026-05-15  463  			table = folio_address(folio);
16dc0672038592 Kairui Song 2026-05-15  464  	} else {
16dc0672038592 Kairui Song 2026-05-15  465  		table = kmem_cache_zalloc(swap_table_cachep, gfp);
16dc0672038592 Kairui Song 2026-05-15  466  	}
16dc0672038592 Kairui Song 2026-05-15  467  	if (!table)
16dc0672038592 Kairui Song 2026-05-15  468  		return -ENOMEM;
16dc0672038592 Kairui Song 2026-05-15  469  
16dc0672038592 Kairui Song 2026-05-15  470  	rcu_assign_pointer(ci->table, table);
d029b4aa29fcfc Kairui Song 2026-05-15  471  

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