Re: [PATCH 7/7] mm, swap: simplify folio swap allocation

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

Hi Kairui,

kernel test robot noticed the following build errors:

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

url:    https://github.com/intel-lab-lkp/linux/commits/Kairui-Song/mm-swap-avoid-reclaiming-irrelevant-swap-cache/20250215-020239
base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link:    https://lore.kernel.org/r/20250214175709.76029-8-ryncsn%40gmail.com
patch subject: [PATCH 7/7] mm, swap: simplify folio swap allocation
config: x86_64-buildonly-randconfig-001-20250215 (https://download.01.org/0day-ci/archive/20250216/202502160040.5ULBvBsP-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250216/202502160040.5ULBvBsP-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/202502160040.5ULBvBsP-lkp@intel.com/

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

   In file included from include/linux/suspend.h:5,
                    from arch/x86/kernel/asm-offsets.c:14:
>> include/linux/swap.h:591:1: error: expected identifier or '(' before '{' token
     591 | {
         | ^
>> include/linux/swap.h:590:13: warning: 'folio_alloc_swap' declared 'static' but never defined [-Wunused-function]
     590 | static bool folio_alloc_swap(struct folio *folio, gfp_t gfp_mask);
         |             ^~~~~~~~~~~~~~~~
   make[3]: *** [scripts/Makefile.build:102: arch/x86/kernel/asm-offsets.s] Error 1 shuffle=2631350961
   make[3]: Target 'prepare' not remade because of errors.
   make[2]: *** [Makefile:1264: prepare0] Error 2 shuffle=2631350961
   make[2]: Target 'prepare' not remade because of errors.
   make[1]: *** [Makefile:251: __sub-make] Error 2 shuffle=2631350961
   make[1]: Target 'prepare' not remade because of errors.
   make: *** [Makefile:251: __sub-make] Error 2 shuffle=2631350961
   make: Target 'prepare' not remade because of errors.


vim +591 include/linux/swap.h

8334b96221ff0d Minchan Kim    2015-09-08  589  
f8d9ff0d052908 Kairui Song    2025-02-15 @590  static bool folio_alloc_swap(struct folio *folio, gfp_t gfp_mask);
^1da177e4c3f41 Linus Torvalds 2005-04-16 @591  {
f8d9ff0d052908 Kairui Song    2025-02-15  592  	return false;
^1da177e4c3f41 Linus Torvalds 2005-04-16  593  }
^1da177e4c3f41 Linus Torvalds 2005-04-16  594  

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