[sean-jc:x86/mmu_auto_prefault 5/5] arch/x86/kvm/mmu/mmu.c:121:28: sparse: sparse: symbol 'auto_prefault_nr_pages' was not declared. Should it be static?

tree:   https://github.com/sean-jc/linux x86/mmu_auto_prefault
head:   6fc4c84e91337cf4a01d62d08d10b0b5f774cd5b
commit: 6fc4c84e91337cf4a01d62d08d10b0b5f774cd5b [5/5] tmp
config: x86_64-randconfig-r113-20260827 (https://download.01.org/0day-ci/archive/20260827/[email protected]/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
sparse: v0.6.5-rc1
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260827/[email protected]/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 <[email protected]>
| Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/

sparse warnings: (new ones prefixed by >>)
>> arch/x86/kvm/mmu/mmu.c:121:28: sparse: sparse: symbol 'auto_prefault_nr_pages' was not declared. Should it be static?
   arch/x86/kvm/mmu/mmu.c: note: in included file:
   arch/x86/kvm/mmu/paging_tmpl.h:106:24: sparse: sparse: cast truncates bits from constant value (ffffffffff000 becomes fffff000)
   arch/x86/kvm/mmu/paging_tmpl.h:451:24: sparse: sparse: cast truncates bits from constant value (ffffffffff000 becomes fffff000)
   arch/x86/kvm/mmu/mmu.c:5676:82: sparse: sparse: cast truncates bits from constant value (ffff5555 becomes 5555)
   arch/x86/kvm/mmu/mmu.c:5678:59: sparse: sparse: cast truncates bits from constant value (ffff3333 becomes 3333)
   arch/x86/kvm/mmu/mmu.c:5693:76: sparse: sparse: cast truncates bits from constant value (ffff0f0f becomes f0f)
   arch/x86/kvm/mmu/mmu.c:5693:87: sparse: sparse: cast truncates bits from constant value (ffff00ff becomes ff)
   arch/x86/kvm/mmu/mmu.c:5695:51: sparse: sparse: cast truncates bits from constant value (ffff00ff becomes ff)
   arch/x86/kvm/mmu/mmu.c:5709:70: sparse: sparse: cast truncates bits from constant value (ffff0f0f becomes f0f)
   arch/x86/kvm/mmu/mmu.c:5712:72: sparse: sparse: cast truncates bits from constant value (ffff00ff becomes ff)

vim +/auto_prefault_nr_pages +121 arch/x86/kvm/mmu/mmu.c

   120	
 > 121	unsigned int __read_mostly auto_prefault_nr_pages = KVM_PAGES_PER_HPAGE(PG_LEVEL_2M);
   122	module_param(auto_prefault_nr_pages, uint, 0644);
   123	

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