Hi Nikunj, kernel test robot noticed the following build warnings: [auto build test WARNING on tip/x86/mm] [also build test WARNING on linus/master v6.7-rc3 next-20231128] [cannot apply to tip/x86/core kvm/queue kvm/linux-next] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Nikunj-A-Dadhania/virt-sev-guest-Move-mutex-to-SNP-guest-device-structure/20231128-220026 base: tip/x86/mm patch link: https://lore.kernel.org/r/20231128125959.1810039-11-nikunj%40amd.com patch subject: [PATCH v6 10/16] x86/sev: Add Secure TSC support for SNP guests config: x86_64-rhel-8.3-rust (https://download.01.org/0day-ci/archive/20231129/202311291150.VUYNaQGy-lkp@xxxxxxxxx/config) compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git ae42196bc493ffe877a7e3dff8be32035dea4d07) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231129/202311291150.VUYNaQGy-lkp@xxxxxxxxx/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@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202311291150.VUYNaQGy-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> arch/x86/mm/mem_encrypt_amd.c:216:13: warning: no previous prototype for function 'amd_enc_init' [-Wmissing-prototypes] void __init amd_enc_init(void) ^ arch/x86/mm/mem_encrypt_amd.c:216:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void __init amd_enc_init(void) ^ static 1 warning generated. vim +/amd_enc_init +216 arch/x86/mm/mem_encrypt_amd.c 215 > 216 void __init amd_enc_init(void) 217 { 218 snp_secure_tsc_prepare(); 219 } 220 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki