[openeuler:OLK-6.6 3214/3214] mm/memory.c:2802:5: sparse: sparse: symbol '__remap_pfn_range' was not declared. Should it be static?

[openeuler:OLK-6.6 3214/3214] mm/memory.c:2802:5: sparse: sparse: symbol '__remap_pfn_range' was not declared. Should it be static?

[kernel test robot]

tree:   https://gitee.com/openeuler/kernel.git OLK-6.6
head:   b4a3c05741e1650e8bb8399196fb5d7a318a4698
commit: 923e224a12462d640fa37f3069c6bfafd378ac3b [3214/3214] mm: introduce remap_pfn_range_try_pmd() for PMD-level hugepage mapping
config: x86_64-randconfig-r111-20251118 (https://download.01.org/0day-ci/archive/20251119/202511190025.obom3fen-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251119/202511190025.obom3fen-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/202511190025.obom3fen-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> mm/memory.c:2802:5: sparse: sparse: symbol '__remap_pfn_range' was not declared. Should it be static?
   mm/memory.c:301:9: sparse: sparse: incompatible types in conditional expression (different base types):
   mm/memory.c:301:9: sparse:    void
   mm/memory.c:301:9: sparse:    int

vim +/__remap_pfn_range +2802 mm/memory.c

  2789	
  2790	/**
  2791	 * remap_pfn_range - remap kernel memory to userspace
  2792	 * @vma: user vma to map to
  2793	 * @addr: target page aligned user address to start at
  2794	 * @pfn: page frame number of kernel physical memory address
  2795	 * @size: size of mapping area
  2796	 * @prot: page protection flags for this mapping
  2797	 *
  2798	 * Note: this is only safe if the mm semaphore is held when called.
  2799	 *
  2800	 * Return: %0 on success, negative error code otherwise.
  2801	 */
> 2802	int __remap_pfn_range(struct vm_area_struct *vma, unsigned long addr,
  2803			    unsigned long pfn, unsigned long size, pgprot_t prot,
  2804				unsigned int page_shift)
  2805	{
  2806		int err;
  2807	
  2808		err = track_pfn_remap(vma, &prot, pfn, addr, PAGE_ALIGN(size));
  2809		if (err)
  2810			return -EINVAL;
  2811	
  2812		err = __remap_pfn_range_notrack(vma, addr, pfn, size, prot, page_shift);
  2813		if (err)
  2814			untrack_pfn(vma, pfn, PAGE_ALIGN(size), true);
  2815		return err;
  2816	}
  2817	

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