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-r035-20210209 (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 <l...@intel.com>

All errors (new ones prefixed by >>):

   In file included from include/linux/init.h:5,
                    from include/linux/io.h:10,
                    from drivers/media/common/videobuf2/videobuf2-vmalloc.c:13:
   include/linux/scatterlist.h: In function 'sg_set_buf':
   arch/m68k/include/asm/page_no.h:33:50: warning: ordered comparison of 
pointer with null pointer [-Wextra]
      33 | #define virt_addr_valid(kaddr) (((void *)(kaddr) >= (void 
*)PAGE_OFFSET) && \
         |                                                  ^~
   include/linux/compiler.h:78:42: note: in definition of macro 'unlikely'
      78 | # define unlikely(x) __builtin_expect(!!(x), 0)
         |                                          ^
   include/linux/scatterlist.h:143:2: note: in expansion of macro 'BUG_ON'
     143 |  BUG_ON(!virt_addr_valid(buf));
         |  ^~~~~~
   include/linux/scatterlist.h:143:10: note: in expansion of macro 
'virt_addr_valid'
     143 |  BUG_ON(!virt_addr_valid(buf));
         |          ^~~~~~~~~~~~~~~
   drivers/media/common/videobuf2/videobuf2-vmalloc.c: In function 
'vb2_vmalloc_get_userptr':
>> drivers/media/common/videobuf2/videobuf2-vmalloc.c:108:12: error: implicit 
>> declaration of function '__pfn_to_phys' 
>> [-Werror=implicit-function-declaration]
     108 |    ioremap(__pfn_to_phys(nums[0]), size + offset);
         |            ^~~~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +/__pfn_to_phys +108 drivers/media/common/videobuf2/videobuf2-vmalloc.c

3c18ff06d811f7 drivers/media/video/videobuf2-vmalloc.c            Pawel Osciak  
        2010-10-11   73  
36c0f8b32c4bd4 drivers/media/v4l2-core/videobuf2-vmalloc.c        Hans Verkuil  
        2016-04-15   74  static void *vb2_vmalloc_get_userptr(struct device 
*dev, unsigned long vaddr,
cd474037c4a9a9 drivers/media/v4l2-core/videobuf2-vmalloc.c        Hans Verkuil  
        2014-11-18   75                                      unsigned long size,
cd474037c4a9a9 drivers/media/v4l2-core/videobuf2-vmalloc.c        Hans Verkuil  
        2014-11-18   76                                      enum 
dma_data_direction dma_dir)
4419b8aca8dc13 drivers/media/video/videobuf2-vmalloc.c            Andrzej 
Pietrasiewicz 2011-10-13   77  {
4419b8aca8dc13 drivers/media/video/videobuf2-vmalloc.c            Andrzej 
Pietrasiewicz 2011-10-13   78         struct vb2_vmalloc_buf *buf;
5a9e4dec393a2c drivers/media/v4l2-core/videobuf2-vmalloc.c        Jan Kara      
        2015-07-13   79         struct frame_vector *vec;
5a9e4dec393a2c drivers/media/v4l2-core/videobuf2-vmalloc.c        Jan Kara      
        2015-07-13   80         int n_pages, offset, i;
0ff657b0f6120c drivers/media/v4l2-core/videobuf2-vmalloc.c        Hans Verkuil  
        2016-07-21   81         int ret = -ENOMEM;
4419b8aca8dc13 drivers/media/video/videobuf2-vmalloc.c            Andrzej 
Pietrasiewicz 2011-10-13   82  
4419b8aca8dc13 drivers/media/video/videobuf2-vmalloc.c            Andrzej 
Pietrasiewicz 2011-10-13   83         buf = kzalloc(sizeof(*buf), GFP_KERNEL);
4419b8aca8dc13 drivers/media/video/videobuf2-vmalloc.c            Andrzej 
Pietrasiewicz 2011-10-13   84         if (!buf)
0ff657b0f6120c drivers/media/v4l2-core/videobuf2-vmalloc.c        Hans Verkuil  
        2016-07-21   85                 return ERR_PTR(-ENOMEM);
4419b8aca8dc13 drivers/media/video/videobuf2-vmalloc.c            Andrzej 
Pietrasiewicz 2011-10-13   86  
cd474037c4a9a9 drivers/media/v4l2-core/videobuf2-vmalloc.c        Hans Verkuil  
        2014-11-18   87         buf->dma_dir = dma_dir;
4419b8aca8dc13 drivers/media/video/videobuf2-vmalloc.c            Andrzej 
Pietrasiewicz 2011-10-13   88         offset = vaddr & ~PAGE_MASK;
4419b8aca8dc13 drivers/media/video/videobuf2-vmalloc.c            Andrzej 
Pietrasiewicz 2011-10-13   89         buf->size = size;
707947247e9517 drivers/media/common/videobuf2/videobuf2-vmalloc.c Hans Verkuil  
        2019-04-04   90         vec = vb2_create_framevec(vaddr, size);
0ff657b0f6120c drivers/media/v4l2-core/videobuf2-vmalloc.c        Hans Verkuil  
        2016-07-21   91         if (IS_ERR(vec)) {
0ff657b0f6120c drivers/media/v4l2-core/videobuf2-vmalloc.c        Hans Verkuil  
        2016-07-21   92                 ret = PTR_ERR(vec);
5a9e4dec393a2c drivers/media/v4l2-core/videobuf2-vmalloc.c        Jan Kara      
        2015-07-13   93                 goto fail_pfnvec_create;
0ff657b0f6120c drivers/media/v4l2-core/videobuf2-vmalloc.c        Hans Verkuil  
        2016-07-21   94         }
5a9e4dec393a2c drivers/media/v4l2-core/videobuf2-vmalloc.c        Jan Kara      
        2015-07-13   95         buf->vec = vec;
5a9e4dec393a2c drivers/media/v4l2-core/videobuf2-vmalloc.c        Jan Kara      
        2015-07-13   96         n_pages = frame_vector_count(vec);
5a9e4dec393a2c drivers/media/v4l2-core/videobuf2-vmalloc.c        Jan Kara      
        2015-07-13   97         if (frame_vector_to_pages(vec) < 0) {
5a9e4dec393a2c drivers/media/v4l2-core/videobuf2-vmalloc.c        Jan Kara      
        2015-07-13   98                 unsigned long *nums = 
frame_vector_pfns(vec);
4419b8aca8dc13 drivers/media/video/videobuf2-vmalloc.c            Andrzej 
Pietrasiewicz 2011-10-13   99  
5a9e4dec393a2c drivers/media/v4l2-core/videobuf2-vmalloc.c        Jan Kara      
        2015-07-13  100                 /*
5a9e4dec393a2c drivers/media/v4l2-core/videobuf2-vmalloc.c        Jan Kara      
        2015-07-13  101                  * We cannot get page pointers for 
these pfns. Check memory is
5a9e4dec393a2c drivers/media/v4l2-core/videobuf2-vmalloc.c        Jan Kara      
        2015-07-13  102                  * physically contiguous and use direct 
mapping.
5a9e4dec393a2c drivers/media/v4l2-core/videobuf2-vmalloc.c        Jan Kara      
        2015-07-13  103                  */
5a9e4dec393a2c drivers/media/v4l2-core/videobuf2-vmalloc.c        Jan Kara      
        2015-07-13  104                 for (i = 1; i < n_pages; i++)
5a9e4dec393a2c drivers/media/v4l2-core/videobuf2-vmalloc.c        Jan Kara      
        2015-07-13  105                         if (nums[i-1] + 1 != nums[i])
5a9e4dec393a2c drivers/media/v4l2-core/videobuf2-vmalloc.c        Jan Kara      
        2015-07-13  106                                 goto fail_map;
5a9e4dec393a2c drivers/media/v4l2-core/videobuf2-vmalloc.c        Jan Kara      
        2015-07-13  107                 buf->vaddr = (__force void *)
4bdc0d676a6431 drivers/media/common/videobuf2/videobuf2-vmalloc.c Christoph 
Hellwig     2020-01-06 @108                         
ioremap(__pfn_to_phys(nums[0]), size + offset);
570d2a48b70094 drivers/media/video/videobuf2-vmalloc.c            Javier Martin 
        2012-02-16  109         } else {
d4efd79a81abc7 drivers/media/common/videobuf2/videobuf2-vmalloc.c Christoph 
Hellwig     2020-06-01  110                 buf->vaddr = 
vm_map_ram(frame_vector_pages(vec), n_pages, -1);
570d2a48b70094 drivers/media/video/videobuf2-vmalloc.c            Javier Martin 
        2012-02-16  111         }
4419b8aca8dc13 drivers/media/video/videobuf2-vmalloc.c            Andrzej 
Pietrasiewicz 2011-10-13  112  
5a9e4dec393a2c drivers/media/v4l2-core/videobuf2-vmalloc.c        Jan Kara      
        2015-07-13  113         if (!buf->vaddr)
5a9e4dec393a2c drivers/media/v4l2-core/videobuf2-vmalloc.c        Jan Kara      
        2015-07-13  114                 goto fail_map;
4419b8aca8dc13 drivers/media/video/videobuf2-vmalloc.c            Andrzej 
Pietrasiewicz 2011-10-13  115         buf->vaddr += offset;
4419b8aca8dc13 drivers/media/video/videobuf2-vmalloc.c            Andrzej 
Pietrasiewicz 2011-10-13  116         return buf;
4419b8aca8dc13 drivers/media/video/videobuf2-vmalloc.c            Andrzej 
Pietrasiewicz 2011-10-13  117  
5a9e4dec393a2c drivers/media/v4l2-core/videobuf2-vmalloc.c        Jan Kara      
        2015-07-13  118  fail_map:
5a9e4dec393a2c drivers/media/v4l2-core/videobuf2-vmalloc.c        Jan Kara      
        2015-07-13  119         vb2_destroy_framevec(vec);
5a9e4dec393a2c drivers/media/v4l2-core/videobuf2-vmalloc.c        Jan Kara      
        2015-07-13  120  fail_pfnvec_create:
4419b8aca8dc13 drivers/media/video/videobuf2-vmalloc.c            Andrzej 
Pietrasiewicz 2011-10-13  121         kfree(buf);
4419b8aca8dc13 drivers/media/video/videobuf2-vmalloc.c            Andrzej 
Pietrasiewicz 2011-10-13  122  
0ff657b0f6120c drivers/media/v4l2-core/videobuf2-vmalloc.c        Hans Verkuil  
        2016-07-21  123         return ERR_PTR(ret);
4419b8aca8dc13 drivers/media/video/videobuf2-vmalloc.c            Andrzej 
Pietrasiewicz 2011-10-13  124  }
4419b8aca8dc13 drivers/media/video/videobuf2-vmalloc.c            Andrzej 
Pietrasiewicz 2011-10-13  125  

:::::: The code at line 108 was first introduced by commit
:::::: 4bdc0d676a643140bdf17dbf7eafedee3d496a3c remove ioremap_nocache and 
devm_ioremap_nocache

:::::: TO: Christoph Hellwig <h...@lst.de>
:::::: CC: Christoph Hellwig <h...@lst.de>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-...@lists.01.org

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