Re: [PATCH 13/16] mm: remove non_swap_entry() and use leaf entry helpers instead

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

Hi Lorenzo,

kernel test robot noticed the following build warnings:

[auto build test WARNING on akpm-mm/mm-everything]

url:    https://github.com/intel-lab-lkp/linux/commits/Lorenzo-Stoakes/mm-correctly-handle-UFFD-PTE-markers/20251103-204118
base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link:    https://lore.kernel.org/r/b4925aeaf6b7e8255b1cf1585476b718862b8104.1762171281.git.lorenzo.stoakes%40oracle.com
patch subject: [PATCH 13/16] mm: remove non_swap_entry() and use leaf entry helpers instead
config: s390-randconfig-r112-20251104 (https://download.01.org/0day-ci/archive/20251104/202511041345.8K1Nt70Q-lkp@intel.com/config)
compiler: s390-linux-gcc (GCC) 12.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251104/202511041345.8K1Nt70Q-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/202511041345.8K1Nt70Q-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> arch/s390/mm/pgtable.c:693:47: sparse: sparse: incorrect type in argument 1 (different modifiers) @@     expected struct folio *folio @@     got struct folio const *folio @@
   arch/s390/mm/pgtable.c:693:47: sparse:     expected struct folio *folio
   arch/s390/mm/pgtable.c:693:47: sparse:     got struct folio const *folio
   arch/s390/mm/pgtable.c:1098:9: sparse: sparse: context imbalance in 'pgste_perform_essa' - unexpected unlock
   arch/s390/mm/pgtable.c: note: in included file (through include/linux/pgtable.h, include/linux/mm.h):
   arch/s390/include/asm/pgtable.h:2067:9: sparse: sparse: context imbalance in 'set_pgste_bits' - unexpected unlock
   arch/s390/mm/pgtable.c: note: in included file:
   include/linux/mm.h:2832:9: sparse: sparse: context imbalance in 'get_pgste' - unexpected unlock

vim +693 arch/s390/mm/pgtable.c

4be130a08420d6 Martin Schwidefsky 2016-03-08  685  
9c8ce56552b434 Lorenzo Stoakes    2025-11-03  686  static void ptep_zap_leaf_entry(struct mm_struct *mm, leaf_entry_t entry)
1e133ab296f3ff Martin Schwidefsky 2016-03-08  687  {
9c8ce56552b434 Lorenzo Stoakes    2025-11-03  688  	if (leafent_is_swap(entry))
1e133ab296f3ff Martin Schwidefsky 2016-03-08  689  		dec_mm_counter(mm, MM_SWAPENTS);
9c8ce56552b434 Lorenzo Stoakes    2025-11-03  690  	else if (leafent_is_migration(entry)) {
9c8ce56552b434 Lorenzo Stoakes    2025-11-03  691  		const struct folio *folio = leafent_to_folio(entry);
1e133ab296f3ff Martin Schwidefsky 2016-03-08  692  
a23f517b0e1554 Kefeng Wang        2024-01-11 @693  		dec_mm_counter(mm, mm_counter(folio));
1e133ab296f3ff Martin Schwidefsky 2016-03-08  694  	}
1e133ab296f3ff Martin Schwidefsky 2016-03-08  695  	free_swap_and_cache(entry);
1e133ab296f3ff Martin Schwidefsky 2016-03-08  696  }
1e133ab296f3ff Martin Schwidefsky 2016-03-08  697  

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