Re: [PATCH 4/5] vfio: Introduce vfio_device_ops.get_unmapped_area hook

[kernel test robot]

Hi Peter,

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/Peter-Xu/mm-Deduplicate-mm_get_unmapped_area/20250613-214307
base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link:    https://lore.kernel.org/r/20250613134111.469884-5-peterx%40redhat.com
patch subject: [PATCH 4/5] vfio: Introduce vfio_device_ops.get_unmapped_area hook
config: sh-randconfig-002-20250614 (https://download.01.org/0day-ci/archive/20250614/202506142215.koMEU2rT-lkp@xxxxxxxxx/config)
compiler: sh4-linux-gcc (GCC) 12.4.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250614/202506142215.koMEU2rT-lkp@xxxxxxxxx/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@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202506142215.koMEU2rT-lkp@xxxxxxxxx/

All errors (new ones prefixed by >>):

   drivers/vfio/vfio_main.c: In function 'vfio_device_get_unmapped_area':
>> drivers/vfio/vfio_main.c:1367:24: error: implicit declaration of function 'mm_get_unmapped_area'; did you mean 'get_unmapped_area'? [-Werror=implicit-function-declaration]
    1367 |                 return mm_get_unmapped_area(current->mm, file, addr,
         |                        ^~~~~~~~~~~~~~~~~~~~
         |                        get_unmapped_area
   cc1: some warnings being treated as errors


vim +1367 drivers/vfio/vfio_main.c

  1356	
  1357	static unsigned long vfio_device_get_unmapped_area(struct file *file,
  1358							   unsigned long addr,
  1359							   unsigned long len,
  1360							   unsigned long pgoff,
  1361							   unsigned long flags)
  1362	{
  1363		struct vfio_device_file *df = file->private_data;
  1364		struct vfio_device *device = df->device;
  1365	
  1366		if (!device->ops->get_unmapped_area)
> 1367			return mm_get_unmapped_area(current->mm, file, addr,
  1368						    len, pgoff, flags);
  1369	
  1370		return device->ops->get_unmapped_area(device, file, addr, len,
  1371						      pgoff, flags);
  1372	}
  1373	

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