linux-kernel - [intel-tdx:guest-attest 4/6] arch/x86/coco/mem.c:27:26: warning: function 'virt_to_dma' is not needed and will not be emitted

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Date:   Tue, 16 Aug 2022 13:31:45 +0800
From:   kernel test robot <lkp@...el.com>
To:     Kuppuswamy Sathyanarayanan 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org
Subject: [intel-tdx:guest-attest 4/6] arch/x86/coco/mem.c:27:26: warning:
 function 'virt_to_dma' is not needed and will not be emitted

tree:   https://github.com/intel/tdx.git guest-attest
head:   29cf51327dcbef2938acadd84f7af09d1a595839
commit: caa30fa6065f7a5ece3c51e67ab95cbf3cd69c23 [4/6] x86/coco: Add cc_decrypted_alloc/free() interfaces
config: x86_64-randconfig-a013-20220815
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project aed5e3bea138ce581d682158eb61c27b3cfdd6ec)
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/caa30fa6065f7a5ece3c51e67ab95cbf3cd69c23
        git remote add intel-tdx https://github.com/intel/tdx.git
        git fetch --no-tags intel-tdx guest-attest
        git checkout caa30fa6065f7a5ece3c51e67ab95cbf3cd69c23
        # 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/

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

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	

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp

View attachment "config" of type "text/plain" (162369 bytes)