Re: [PATCH v1 07/10] mm/truncate: use folio_split() in truncate_inode_partial_folio()

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

Hi Zi,

kernel test robot noticed the following build errors:

[auto build test ERROR on akpm-mm/mm-everything]
[also build test ERROR on brauner-vfs/vfs.all kdave/for-next linus/master v7.0-rc5 next-20260327]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Zi-Yan/mm-remove-READ_ONLY_THP_FOR_FS-Kconfig-option/20260327-142622
base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link:    https://lore.kernel.org/r/20260327014255.2058916-8-ziy%40nvidia.com
patch subject: [PATCH v1 07/10] mm/truncate: use folio_split() in truncate_inode_partial_folio()
config: nios2-allnoconfig (https://download.01.org/0day-ci/archive/20260328/202603281704.ILlsxaUM-lkp@intel.com/config)
compiler: nios2-linux-gcc (GCC) 11.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260328/202603281704.ILlsxaUM-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/202603281704.ILlsxaUM-lkp@intel.com/

All error/warnings (new ones prefixed by >>):

   In file included from include/linux/mm.h:1746,
                    from include/linux/pid_namespace.h:7,
                    from include/linux/ptrace.h:10,
                    from arch/nios2/kernel/asm-offsets.c:10:
>> include/linux/huge_mm.h:625:1: error: expected identifier or '(' before '{' token
     625 | {
         | ^
>> include/linux/huge_mm.h:623:19: warning: 'folio_split' declared 'static' but never defined [-Wunused-function]
     623 | static inline int folio_split(struct folio *folio, unsigned int new_order,
         |                   ^~~~~~~~~~~
   make[3]: *** [scripts/Makefile.build:184: arch/nios2/kernel/asm-offsets.s] Error 1
   make[3]: Target 'prepare' not remade because of errors.
   make[2]: *** [Makefile:1337: prepare0] Error 2
   make[2]: Target 'prepare' not remade because of errors.
   make[1]: *** [Makefile:248: __sub-make] Error 2
   make[1]: Target 'prepare' not remade because of errors.
   make: *** [Makefile:248: __sub-make] Error 2
   make: Target 'prepare' not remade because of errors.


vim +625 include/linux/huge_mm.h

e220917fa50774 Luis Chamberlain 2024-08-22  622  
9ee18d22957981 Zi Yan           2026-03-26 @623  static inline int folio_split(struct folio *folio, unsigned int new_order,
9ee18d22957981 Zi Yan           2026-03-26  624  		struct page *page, struct list_head *list);
7460b470a131f9 Zi Yan           2025-03-07 @625  {
a488ba3124c82d Pankaj Raghav    2025-09-05  626  	VM_WARN_ON_ONCE_FOLIO(1, folio);
a488ba3124c82d Pankaj Raghav    2025-09-05  627  	return -EINVAL;
7460b470a131f9 Zi Yan           2025-03-07  628  }
7460b470a131f9 Zi Yan           2025-03-07  629  

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