[intel-tdx:guest-attest 5/9] arch/x86/coco/mem.c:27:26: warning: function 'virt_to_dma' is not needed and will not be emitted

[kernel test robot]

tree:   https://github.com/intel/tdx.git guest-attest
head:   ef90ba1bf9a2aada5e1f9f6c27b5e2bde91a6991
commit: df7603408ff53cb1344704a728ee152672567b94 [5/9] x86/coco: Add cc_decrypted_alloc/free() interfaces
config: x86_64-randconfig-r021-20220912 (https://download.01.org/0day-ci/archive/20220913/202209130117.Ve8dGyqo-lkp@xxxxxxxxx/config)
compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project f28c006a5895fc0e329fe15fead81e37457cb1d1)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/intel/tdx/commit/df7603408ff53cb1344704a728ee152672567b94
        git remote add intel-tdx https://github.com/intel/tdx.git
        git fetch --no-tags intel-tdx guest-attest
        git checkout df7603408ff53cb1344704a728ee152672567b94
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash arch/x86/coco/ arch/x86/kernel/ lib/ net/mptcp/

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

All warnings (new ones prefixed by >>):

>> arch/x86/coco/mem.c:27:26: warning: function 'virt_to_dma' is not needed and will not be emitted [-Wunneeded-internal-declaration]
   static inline dma_addr_t virt_to_dma(void *vaddr)
                            ^
   1 warning generated.


vim +/virt_to_dma +27 arch/x86/coco/mem.c

    26	
  > 27	static inline dma_addr_t virt_to_dma(void *vaddr)
    28	{
    29		return phys_to_dma(&mem_pdev->dev, virt_to_phys(vaddr));
    30	}
    31	

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