[kbuild-all] [intel-tdx:guest 36/144] arch/x86/mm/mem_encrypt_common.c:14:6: warning: no previous prototype for 'force_dma_unencrypted'

tree: https://github.com/intel/tdx.git guest head: 41fe88a1b3c28543f49fa6ed9e0e9b6650ed7614 commit: e6712c98ae60430d8f0d207fa3352e408a56c69f [36/144] x86/mm: Move force_dma_unencrypted() to common code config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20211210/202112100722.xdCK1rLH-lk...) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://github.com/intel/tdx/commit/e6712c98ae60430d8f0d207fa3352e408a56c69f git remote add intel-tdx https://github.com/intel/tdx.git git fetch --no-tags intel-tdx guest git checkout e6712c98ae60430d8f0d207fa3352e408a56c69f # save the config file to linux build tree mkdir build_dir make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash arch/x86/mm/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): 14 | bool force_dma_unencrypted(struct device *dev) | ^~~~~~~~~~~~~~~~~~~~~ vim +/force_dma_unencrypted +14 arch/x86/mm/mem_encrypt_common.c 12 13 /* Override for DMA direct allocation check - ARCH_HAS_FORCE_DMA_UNENCRYPTED */ --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org