[android-common:android17-6.18-kminext 1/1] drivers/vfio/vfio_main.c:65:6: sparse: sparse: symbol 'allow_non_coherent' was not declared. Should it be static?

[android-common:android17-6.18-kminext 1/1] drivers/vfio/vfio_main.c:65:6: sparse: sparse: symbol 'allow_non_coherent' was not declared. Should it be static?

[kernel test robot]

tree:   https://android.googlesource.com/kernel/common android17-6.18-kminext
head:   9a6f48bb2f89b94bc6857fece1131c450c0d5bee
commit: 88e59f90e918a5d074d07e6f6c5af7a58317a1d4 [1/1] ANDROID: drivers/vfio: Allow non-coherent device for pKVM
config: i386-randconfig-r133-20260717 (https://download.01.org/0day-ci/archive/20260717/202607171935.pzIPaD2n-lkp@intel.com/config)
compiler: clang version 22.1.3 (https://github.com/llvm/llvm-project e9846648fd6183ee6d8cbdb4502213fcf902a211)
sparse: v0.6.5-rc1
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260717/202607171935.pzIPaD2n-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/202607171935.pzIPaD2n-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/vfio/vfio_main.c:65:6: sparse: sparse: symbol 'allow_non_coherent' was not declared. Should it be static?

vim +/allow_non_coherent +65 drivers/vfio/vfio_main.c

    64	
  > 65	bool allow_non_coherent __read_mostly;
    66	module_param(allow_non_coherent, bool, 0444);
    67	MODULE_PARM_DESC(allow_non_coherent, "Allow binding of non-coherent devices, not supported with type1 IOMMU. (default: false)");
    68	

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