tree:   https://github.com/ammarfaizi2/linux-block akpm/mm/mm-unstable
head:   b62e8196de8602c16d6ea10807d147b480db2712
commit: 2234b0437c6fa63c611df1032c614464957e9262 [289/353] mm/debug_vm_pgtable: more pte_swp_exclusive() sanity checks
config: x86_64-randconfig-a003
compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project f28c006a5895fc0e329fe15fead81e37457cb1d1)
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/2234b0437c6fa63c611df1032c614464957e9262
        git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
        git fetch --no-tags ammarfaizi2-block akpm/mm/mm-unstable
        git checkout 2234b0437c6fa63c611df1032c614464957e9262
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 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:814:36: error: implicit declaration of function 'generic_max_swapfile_size' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
           unsigned long max_swapfile_size = generic_max_swapfile_size();
                                             ^
   1 error generated.


vim +/generic_max_swapfile_size +814 mm/debug_vm_pgtable.c

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

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