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

kernel test robot
2025-06-14T14:47:06Z

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@intel.com/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@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/202506142215.koMEU2rT-lkp@intel.com/

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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0-DAY CI Kernel Test Service