[gourryinverse:gourry_pagecache 5/5] mm/migrate.c:2779: warning: Function parameter or struct member 'folio' not described in 'promotion_candidate'

[gourryinverse:gourry_pagecache 5/5] mm/migrate.c:2779: warning: Function parameter or struct member 'folio' not described in 'promotion_candidate'

[kernel test robot]

tree:   https://github.com/gourryinverse/linux gourry_pagecache
head:   a83d4b477373194ebc680bcd0123bfbbc010dddb
commit: a83d4b477373194ebc680bcd0123bfbbc010dddb [5/5] migrate,sysfs: add pagecache promotion
config: csky-randconfig-001-20250322 (https://download.01.org/0day-ci/archive/20250322/202503220608.cRFEllb9-lkp@intel.com/config)
compiler: csky-linux-gcc (GCC) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250322/202503220608.cRFEllb9-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/202503220608.cRFEllb9-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> mm/migrate.c:2779: warning: Function parameter or struct member 'folio' not described in 'promotion_candidate'


vim +2779 mm/migrate.c

  2767	
  2768	/**
  2769	 * promotion_candidate: report a promotion candidate folio
  2770	 *
  2771	 * The folio will be isolated from LRU if selected, and task_work will
  2772	 * putback the folio on promotion failure.
  2773	 *
  2774	 * Candidates may not be promoted and may be returned to the LRU.
  2775	 *
  2776	 * Takes a folio reference that will be released in task work.
  2777	 */
  2778	void promotion_candidate(struct folio *folio)
> 2779	{

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