Re: drivers/media/common/videobuf2/videobuf2-dma-contig.c:509:5: error: implicit declaration of function '__pfn_to_phys'

[Mike Rapoport]

On Thu, Feb 11, 2021 at 10:03:54PM +0800, kernel test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   291009f656e8eaebbdfd3a8d99f6b190a9ce9deb
> commit: 4bfc848e0981fcd35db00fe1c6581560689f6dc7 m68k/mm: enable use of generic memory_model.h for !DISCONTIGMEM
> date:   8 weeks ago
> config: m68k-randconfig-r021-20210211 (attached as .config)
> compiler: m68k-linux-gcc (GCC) 9.3.0
> reproduce (this is a W=1 build):
>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4bfc848e0981fcd35db00fe1c6581560689f6dc7
>         git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
>         git fetch --no-tags linus master
>         git checkout 4bfc848e0981fcd35db00fe1c6581560689f6dc7
>         # save the attached .config to linux build tree
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=m68k 
> 
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@xxxxxxxxx>
> 
> All errors (new ones prefixed by >>):
> 
>    drivers/media/common/videobuf2/videobuf2-dma-contig.c: In function 'vb2_dc_get_userptr':
> >> drivers/media/common/videobuf2/videobuf2-dma-contig.c:509:5: error: implicit declaration of function '__pfn_to_phys' [-Werror=implicit-function-declaration]
>      509 |     __pfn_to_phys(nums[0]), size, buf->dma_dir, 0);
>          |     ^~~~~~~~~~~~~
>    cc1: some warnings being treated as errors

Here is the fix: