tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   4ca786ae6681b90b0ec3f4c55c89d12f835f8944
commit: 07108d5bfeebafd43f2c2c23d9cba13cadd2fe79 [973/1443] fsdax: introduce pgmap_request_folios()
config: x86_64-rhel-8.3-rust
compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project f28c006a5895fc0e329fe15fead81e37457cb1d1)
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=07108d5bfeebafd43f2c2c23d9cba13cadd2fe79
        git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
        git fetch --no-tags linux-next master
        git checkout 07108d5bfeebafd43f2c2c23d9cba13cadd2fe79
        # save the config file
        mkdir build_dir && cp config build_dir/.config
         O=build_dir ARCH=x86_64 SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> mm/memremap.c:533:13: warning: function 'folio_span_valid' is not needed and will not be emitted [-Wunneeded-internal-declaration]
   static bool folio_span_valid(struct dev_pagemap *pgmap, struct folio *folio,
               ^
   1 warning generated.


vim +/folio_span_valid +533 mm/memremap.c

   532	
 > 533	static bool folio_span_valid(struct dev_pagemap *pgmap, struct folio *folio,
   534				     int nr_folios)
   535	{
   536		unsigned long pfn_start, pfn_end;
   537	
   538		pfn_start = page_to_pfn(folio_page(folio, 0));
   539		pfn_end = pfn_start + (1 << folio_order(folio)) * nr_folios - 1;
   540	
   541		if (pgmap != xa_load(&pgmap_array, pfn_start))
   542			return false;
   543	
   544		if (pfn_end > pfn_start && pgmap != xa_load(&pgmap_array, pfn_end))
   545			return false;
   546	
   547		return true;
   548	}
   549	

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