./linux/scatterlist.h:185:34: error: invalid use of undefined type 'struct folio'

./linux/scatterlist.h:185:34: error: invalid use of undefined type 'struct folio'

[kernel test robot]

:::::: 
:::::: Manual check reason: "low confidence bisect report"
:::::: 

BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
CC: linux-kernel@vger.kernel.org
TO: Mehdi Djait <mehdi.djait@linux.intel.com>
CC: Hans Verkuil <hverkuil@kernel.org>
CC: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
CC: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
CC: Sakari Ailus <sakari.ailus@linux.intel.com>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   8ba098e6b6ff0db8edf28528d1552be261af30d4
commit: 374e55cf087613663440719b08166b6686b36bcc media: i2c: gc2145: Use the v4l2 helper for obtaining the clock
date:   12 months ago
:::::: branch date: 11 hours ago
:::::: commit date: 12 months ago
config: s390-allnoconfig-bpf (https://download.01.org/0day-ci/archive/20260731/202607311316.elGoAGfd-lkp@intel.com/config)
compiler: s390x-linux-gnu-gcc (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260731/202607311316.elGoAGfd-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
| Fixes: 374e55cf0876 ("media: i2c: gc2145: Use the v4l2 helper for obtaining the clock")
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/r/202607311316.elGoAGfd-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from main.c:4:
   ./linux/scatterlist.h:180:64: warning: 'struct folio' declared inside parameter list will not be visible outside of this definition or declaration
     180 | static inline void sg_set_folio(struct scatterlist *sg, struct folio *folio,
         |                                                                ^~~~~
   ./linux/scatterlist.h: In function 'sg_set_folio':
>> ./linux/scatterlist.h:185:34: error: invalid use of undefined type 'struct folio'
     185 |         sg_assign_page(sg, &folio->page);
         |                                  ^~

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