tree: https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git x86/wip.ibt head: 7b31f08c5f3fb5f3cfd75deb24787569f35315d5 commit: e4b4623dc6a99968ab59ea14cdae2c7a09924838 [7/15] x86: Don't generate ENDBR in .discard.text config: x86_64-randconfig-a003 (https://download.01.org/0day-ci/archive/20220115/202201151505.wRwvYlwh-lk...) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 82c8aca93488730ce8f66101e0f3538f14b551dd) 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://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git/commit/?... git remote add peterz-queue https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git git fetch --no-tags peterz-queue x86/wip.ibt git checkout e4b4623dc6a99968ab59ea14cdae2c7a09924838 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash arch/x86/kernel/ 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 >>): RESERVE_BRK(dmi_alloc, 65536); ^ arch/x86/include/asm/setup.h:122:56: note: expanded from macro 'RESERVE_BRK' static void __section(".discard.text") __attribute__((nocf_check)) __used notrace \ ^ 1 warning generated. -- RESERVE_BRK(early_pgt_alloc, INIT_PGT_BUF_SIZE); ^ arch/x86/include/asm/setup.h:122:56: note: expanded from macro 'RESERVE_BRK' static void __section(".discard.text") __attribute__((nocf_check)) __used notrace \ ^ 1 warning generated. vim +/nocf_check +65 arch/x86/kernel/setup.c 2b72394e408964 Pekka Enberg 2009-04-28 63 e808bae2407a08 Thadeu Lima de Souza Cascardo 2010-02-09 64 #ifdef CONFIG_DMI 796216a57fe45c Jeremy Fitzhardinge 2009-03-12 @65 RESERVE_BRK(dmi_alloc, 65536); e808bae2407a08 Thadeu Lima de Souza Cascardo 2010-02-09 66 #endif 796216a57fe45c Jeremy Fitzhardinge 2009-03-12 67 c0b5842a457d44 Ingo Molnar 2009-01-27 68 :::::: The code at line 65 was first introduced by commit :::::: 796216a57fe45c04adc35bda1f0782efec78a713 x86: allow extend_brk users to reserve brk space :::::: TO: Jeremy Fitzhardinge <jeremy.fitzhardinge(a)citrix.com&gt; :::::: CC: H. Peter Anvin <hpa(a)zytor.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org