Hi Nikunj, kernel test robot noticed the following build warnings: [auto build test WARNING on 0a895c0d9b73d934de95aa0dd4e631c394bdd25d] url: https://github.com/intel-lab-lkp/linux/commits/Nikunj-A-Dadhania/x86-sev-Carve-out-and-export-SNP-guest-messaging-init-routines/20241021-140125 base: 0a895c0d9b73d934de95aa0dd4e631c394bdd25d patch link: https://lore.kernel.org/r/20241021055156.2342564-12-nikunj%40amd.com patch subject: [PATCH v13 11/13] tsc: Switch to native sched clock config: i386-buildonly-randconfig-002-20241022 (https://download.01.org/0day-ci/archive/20241022/202410220640.W8Ynjt5W-lkp@xxxxxxxxx/config) compiler: gcc-12 (Debian 12.2.0-14) 12.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241022/202410220640.W8Ynjt5W-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/202410220640.W8Ynjt5W-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> arch/x86/kernel/tsc.c:293:6: warning: no previous prototype for 'enable_native_sched_clock' [-Wmissing-prototypes] 293 | void enable_native_sched_clock(void) { } | ^~~~~~~~~~~~~~~~~~~~~~~~~ vim +/enable_native_sched_clock +293 arch/x86/kernel/tsc.c 292 > 293 void enable_native_sched_clock(void) { } 294 #endif 295 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki