[weiny2:lm-misc 7/8] arch/sparc/mm/highmem.c:58:24: error: initialization of 'long unsigned int' from 'void *' makes integer from pointer without a cast

[kbuild test robot <lkp@intel.com>]

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tree:   https://github.com/weiny2/linux-kernel.git lm-misc
head:   8c385a87dc5cb4d98fa417d3dd9481f3fbe4c625
commit: 9bbedda97f815fb2b6478966706968af63c983c2 [7/8] arch/kmap_atomic: Consolidate duplicate code
config: sparc-defconfig (attached as .config)
compiler: sparc-linux-gcc (GCC) 9.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 9bbedda97f815fb2b6478966706968af63c983c2
        # save the attached .config to linux build tree
        GCC_VERSION=9.3.0 make.cross ARCH=sparc 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kbuild test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   In file included from arch/sparc/mm/highmem.c:26:
   include/linux/highmem.h: In function 'kmap':
   include/linux/highmem.h:40:9: error: implicit declaration of function '__kmap'; did you mean 'kmap'? [-Werror=implicit-function-declaration]
      40 |  return __kmap(page);
         |         ^~~~~~
         |         kmap
   include/linux/highmem.h:40:9: error: returning 'int' from a function with return type 'void *' makes pointer from integer without a cast [-Werror=int-conversion]
      40 |  return __kmap(page);
         |         ^~~~~~~~~~~~
   include/linux/highmem.h: In function 'kunmap':
   include/linux/highmem.h:48:3: error: 'return' with no value, in function returning non-void [-Werror=return-type]
      48 |   return;
         |   ^~~~~~
   include/linux/highmem.h:44:21: note: declared here
      44 | static inline void *kunmap(struct page *page)
         |                     ^~~~~~
   arch/sparc/mm/highmem.c: In function 'kmap_atomic':
>> arch/sparc/mm/highmem.c:58:24: error: initialization of 'long unsigned int' from 'void *' makes integer from pointer without a cast [-Werror=int-conversion]
      58 |  unsigned long vaddr = __kmap_atomic(page);
         |                        ^~~~~~~~~~~~~
   cc1: all warnings being treated as errors

vim +58 arch/sparc/mm/highmem.c

    55	
    56	void *kmap_atomic(struct page *page)
    57	{
  > 58		unsigned long vaddr = __kmap_atomic(page);
    59		long idx, type;
    60	
    61		if (vaddr)
    62			return (void *)vaddr;
    63	
    64		type = kmap_atomic_idx_push();
    65		idx = type + KM_TYPE_NR*smp_processor_id();
    66		vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
    67	

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

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