[intel-tdx:guest 102/136] arch/x86/kernel/tdx.c:712:15: sparse: sparse: symbol 'tdx_mmio_readq' was not declared. Should it be static?

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

tree:   https://github.com/intel/tdx.git guest
head:   f3d7a7e86bf2f0d5ce629f2fb7be11dca88ac06d
commit: c2b75088b70d45a8b98121cd1c4a4fa1380d4cf7 [102/136] x86/tdx: Enable direct iomap MMIO optimizations
config: x86_64-randconfig-s021 (https://download.01.org/0day-ci/archive/20230208/202302081112.STP1dlyS-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-8) 11.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.4-39-gce1a6720-dirty
        # https://github.com/intel/tdx/commit/c2b75088b70d45a8b98121cd1c4a4fa1380d4cf7
        git remote add intel-tdx https://github.com/intel/tdx.git
        git fetch --no-tags intel-tdx guest
        git checkout c2b75088b70d45a8b98121cd1c4a4fa1380d4cf7
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=x86_64 olddefconfig
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=x86_64 SHELL=/bin/bash arch/x86/kernel/

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

sparse warnings: (new ones prefixed by >>)
   arch/x86/kernel/tdx.c:267:5: sparse: sparse: symbol 'tdx_hcall_set_notify_intr' was not declared. Should it be static?
   arch/x86/kernel/tdx.c:490:14: sparse: sparse: symbol 'tdx_write_msr' was not declared. Should it be static?
>> arch/x86/kernel/tdx.c:712:15: sparse: sparse: symbol 'tdx_mmio_readq' was not declared. Should it be static?

vim +/tdx_mmio_readq +712 arch/x86/kernel/tdx.c

   711	
 > 712	unsigned long tdx_mmio_readq(void __iomem *addr)
   713	{
   714		unsigned long val;
   715	
   716		if (tdx_virt_mmio(8, false, (unsigned long)addr, &val))
   717			return 0xffffffffffffffff;
   718		return val;
   719	}
   720	

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