tree:   https://github.com/ammarfaizi2/linux-block akpm/mm/mm-unstable
head:   b62e8196de8602c16d6ea10807d147b480db2712
commit: 3998ff1605c2fed98599644259ee92f7154a4907 [313/353] xtensa/mm: support __HAVE_ARCH_PTE_SWP_EXCLUSIVE
config: xtensa-randconfig-r023-20230112
compiler: xtensa-linux-gcc (GCC) 12.1.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/ammarfaizi2/linux-block/commit/3998ff1605c2fed98599644259ee92f7154a4907
        git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
        git fetch --no-tags ammarfaizi2-block akpm/mm/mm-unstable
        git checkout 3998ff1605c2fed98599644259ee92f7154a4907
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=xtensa olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=xtensa SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   mm/debug_vm_pgtable.c: In function 'pte_swap_exclusive_tests':
>> mm/debug_vm_pgtable.c:814:43: error: implicit declaration of function 'generic_max_swapfile_size' [-Werror=implicit-function-declaration]
     814 |         unsigned long max_swapfile_size = generic_max_swapfile_size();
         |                                           ^~~~~~~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +/generic_max_swapfile_size +814 mm/debug_vm_pgtable.c

05289402d71736 Anshuman Khandual 2020-08-06  810  
210d1e8af42df0 David Hildenbrand 2022-05-09  811  static void __init pte_swap_exclusive_tests(struct pgtable_debug_args *args)
210d1e8af42df0 David Hildenbrand 2022-05-09  812  {
210d1e8af42df0 David Hildenbrand 2022-05-09  813  #ifdef __HAVE_ARCH_PTE_SWP_EXCLUSIVE
2234b0437c6fa6 David Hildenbrand 2023-01-13 @814  	unsigned long max_swapfile_size = generic_max_swapfile_size();
2234b0437c6fa6 David Hildenbrand 2023-01-13  815  	swp_entry_t entry, entry2;
2234b0437c6fa6 David Hildenbrand 2023-01-13  816  	pte_t pte;
210d1e8af42df0 David Hildenbrand 2022-05-09  817  
210d1e8af42df0 David Hildenbrand 2022-05-09  818  	pr_debug("Validating PTE swap exclusive\n");
2234b0437c6fa6 David Hildenbrand 2023-01-13  819  
2234b0437c6fa6 David Hildenbrand 2023-01-13  820  	/* Create a swp entry with all possible bits set */
2234b0437c6fa6 David Hildenbrand 2023-01-13  821  	entry = swp_entry((1 << MAX_SWAPFILES_SHIFT) - 1,
2234b0437c6fa6 David Hildenbrand 2023-01-13  822  			  max_swapfile_size - 1);
2234b0437c6fa6 David Hildenbrand 2023-01-13  823  
2234b0437c6fa6 David Hildenbrand 2023-01-13  824  	pte = swp_entry_to_pte(entry);
2234b0437c6fa6 David Hildenbrand 2023-01-13  825  	WARN_ON(pte_swp_exclusive(pte));
2234b0437c6fa6 David Hildenbrand 2023-01-13  826  	WARN_ON(!is_swap_pte(pte));
2234b0437c6fa6 David Hildenbrand 2023-01-13  827  	entry2 = pte_to_swp_entry(pte);
2234b0437c6fa6 David Hildenbrand 2023-01-13  828  	WARN_ON(memcmp(&entry, &entry2, sizeof(entry)));
2234b0437c6fa6 David Hildenbrand 2023-01-13  829  
210d1e8af42df0 David Hildenbrand 2022-05-09  830  	pte = pte_swp_mkexclusive(pte);
210d1e8af42df0 David Hildenbrand 2022-05-09  831  	WARN_ON(!pte_swp_exclusive(pte));
2234b0437c6fa6 David Hildenbrand 2023-01-13  832  	WARN_ON(!is_swap_pte(pte));
2234b0437c6fa6 David Hildenbrand 2023-01-13  833  	WARN_ON(pte_swp_soft_dirty(pte));
2234b0437c6fa6 David Hildenbrand 2023-01-13  834  	entry2 = pte_to_swp_entry(pte);
2234b0437c6fa6 David Hildenbrand 2023-01-13  835  	WARN_ON(memcmp(&entry, &entry2, sizeof(entry)));
2234b0437c6fa6 David Hildenbrand 2023-01-13  836  
210d1e8af42df0 David Hildenbrand 2022-05-09  837  	pte = pte_swp_clear_exclusive(pte);
210d1e8af42df0 David Hildenbrand 2022-05-09  838  	WARN_ON(pte_swp_exclusive(pte));
2234b0437c6fa6 David Hildenbrand 2023-01-13  839  	WARN_ON(!is_swap_pte(pte));
2234b0437c6fa6 David Hildenbrand 2023-01-13  840  	entry2 = pte_to_swp_entry(pte);
2234b0437c6fa6 David Hildenbrand 2023-01-13  841  	WARN_ON(memcmp(&entry, &entry2, sizeof(entry)));
210d1e8af42df0 David Hildenbrand 2022-05-09  842  #endif /* __HAVE_ARCH_PTE_SWP_EXCLUSIVE */
210d1e8af42df0 David Hildenbrand 2022-05-09  843  }
210d1e8af42df0 David Hildenbrand 2022-05-09  844  

:::::: The code at line 814 was first introduced by commit
:::::: 2234b0437c6fa63c611df1032c614464957e9262 mm/debug_vm_pgtable: more pte_swp_exclusive() sanity checks

:::::: TO: David Hildenbrand <david@redhat.com>
:::::: CC: Andrew Morton <akpm@linux-foundation.org>

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests