Hi Max, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 60bb8154d1d77042a5d43d335a68fdb202302cbe commit: da0a4e5c8fbcce3d1afebf9f2a967083bb19634d xtensa: only build windowed register support code when needed date: 12 months ago config: xtensa-randconfig-r022-20221010 compiler: xtensa-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/torvalds/linux.git/commit/?id=da0a4e5c8fbcce3d1afebf9f2a967083bb19634d git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout da0a4e5c8fbcce3d1afebf9f2a967083bb19634d # 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=xtensa SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot All errors (new ones prefixed by >>): arch/xtensa/boot/boot-elf/bootstrap.S: Assembler messages: >> arch/xtensa/boot/boot-elf/bootstrap.S:58: Error: invalid register 'atomctl' for 'wsr' instruction arch/xtensa/boot/boot-elf/bootstrap.S:68: Warning: value 0x00000001a0003000 truncated to 0x00000000a0003000 vim +58 arch/xtensa/boot/boot-elf/bootstrap.S e85e335f8ff615 Max Filippov 2012-12-03 42 e85e335f8ff615 Max Filippov 2012-12-03 43 .align 4 e85e335f8ff615 Max Filippov 2012-12-03 44 _SetupMMU: 09af39f649dac6 Max Filippov 2021-07-26 45 #if XCHAL_HAVE_WINDOWED e85e335f8ff615 Max Filippov 2012-12-03 46 movi a0, 0 e85e335f8ff615 Max Filippov 2012-12-03 47 wsr a0, windowbase e85e335f8ff615 Max Filippov 2012-12-03 48 rsync e85e335f8ff615 Max Filippov 2012-12-03 49 movi a0, 1 e85e335f8ff615 Max Filippov 2012-12-03 50 wsr a0, windowstart e85e335f8ff615 Max Filippov 2012-12-03 51 rsync 09af39f649dac6 Max Filippov 2021-07-26 52 #endif e85e335f8ff615 Max Filippov 2012-12-03 53 movi a0, 0x1F e85e335f8ff615 Max Filippov 2012-12-03 54 wsr a0, ps e85e335f8ff615 Max Filippov 2012-12-03 55 rsync e85e335f8ff615 Max Filippov 2012-12-03 56 e85e335f8ff615 Max Filippov 2012-12-03 57 #ifndef CONFIG_INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX e85e335f8ff615 Max Filippov 2012-12-03 @58 initialize_mmu :::::: The code at line 58 was first introduced by commit :::::: e85e335f8ff615f74e29e09cc2599f095600114b xtensa: add MMU v3 support :::::: TO: Max Filippov :::::: CC: Chris Zankel -- 0-DAY CI Kernel Test Service https://01.org/lkp