tree: https://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild.git kbuild head: 0a7606a9832ab375a38425a659bda13712ca89ae commit: 0a7606a9832ab375a38425a659bda13712ca89ae [8/8] kbuild: move -Wundef from KBUILD_CFLAGS to KBUILD_CPPFLAGS config: powerpc-buildonly-randconfig-r005-20221012 compiler: powerpc-linux-gcc (GCC) 12.1.0 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/masahiroy/linux-kbuild.git/commit/?id=0a7606a9832ab375a38425a659bda13712ca89ae git remote add masahiroy https://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild.git git fetch --no-tags masahiroy kbuild git checkout 0a7606a9832ab375a38425a659bda13712ca89ae # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=powerpc SHELL=/bin/bash arch/powerpc/ If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot All warnings (new ones prefixed by >>): In file included from arch/powerpc/kvm/bookehv_interrupts.S:26: >> arch/powerpc/kvm/../kernel/head_booke.h:20:6: warning: "THREAD_SHIFT" is not defined, evaluates to 0 [-Wundef] 20 | #if (THREAD_SHIFT < 15) | ^~~~~~~~~~~~ vim +/THREAD_SHIFT +20 arch/powerpc/kvm/../kernel/head_booke.h 1a4b739bbb4f885 Christophe Leroy 2019-04-30 10 63dafe5728e7354 Becky Bruce 2006-01-14 11 /* 63dafe5728e7354 Becky Bruce 2006-01-14 12 * Macros used for common Book-e exception handling 63dafe5728e7354 Becky Bruce 2006-01-14 13 */ 63dafe5728e7354 Becky Bruce 2006-01-14 14 63dafe5728e7354 Becky Bruce 2006-01-14 15 #define SET_IVOR(vector_number, vector_label) \ 63dafe5728e7354 Becky Bruce 2006-01-14 16 li r26,vector_label@l; \ 63dafe5728e7354 Becky Bruce 2006-01-14 17 mtspr SPRN_IVOR##vector_number,r26; \ 63dafe5728e7354 Becky Bruce 2006-01-14 18 sync 63dafe5728e7354 Becky Bruce 2006-01-14 19 e12401222f749c3 Yuri Tikhonov 2009-01-29 @20 #if (THREAD_SHIFT < 15) e12401222f749c3 Yuri Tikhonov 2009-01-29 21 #define ALLOC_STACK_FRAME(reg, val) \ e12401222f749c3 Yuri Tikhonov 2009-01-29 22 addi reg,reg,val e12401222f749c3 Yuri Tikhonov 2009-01-29 23 #else e12401222f749c3 Yuri Tikhonov 2009-01-29 24 #define ALLOC_STACK_FRAME(reg, val) \ e12401222f749c3 Yuri Tikhonov 2009-01-29 25 addis reg,reg,val@ha; \ e12401222f749c3 Yuri Tikhonov 2009-01-29 26 addi reg,reg,val@l e12401222f749c3 Yuri Tikhonov 2009-01-29 27 #endif e12401222f749c3 Yuri Tikhonov 2009-01-29 28 :::::: The code at line 20 was first introduced by commit :::::: e12401222f749c37277a313d631dc024bbfd3b00 powerpc/44x: Support for 256KB PAGE_SIZE :::::: TO: Yuri Tikhonov :::::: CC: Josh Boyer -- 0-DAY CI Kernel Test Service https://01.org/lkp