Hi Geert, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: cb690f5238d71f543f4ce874aa59237cf53a877c commit: 0673cb38951215060d7993b43ad3c45cd413c2c3 ARM: 9045/1: uncompress: Validate start of physical memory against passed DTB date: 9 months ago config: arm-randconfig-r022-20210927 (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 11.2.0 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... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 0673cb38951215060d7993b43ad3c45cd413c2c3 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=arm 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 >>): 62 | uint32_t fdt_check_mem_start(uint32_t mem_start, const void *fdt) | ^~~~~~~~~~~~~~~~~~~ vim +/fdt_check_mem_start +62 arch/arm/boot/compressed/fdt_check_mem_start.c 46 47 /* 48 * Check the start of physical memory 49 * 50 * Traditionally, the start address of physical memory is obtained by masking 51 * the program counter. However, this does require that this address is a 52 * multiple of 128 MiB, precluding booting Linux on platforms where this 53 * requirement is not fulfilled. 54 * Hence validate the calculated address against the memory information in the 55 * DTB, and, if out-of-range, replace it by the real start address. 56 * To preserve backwards compatibility (systems reserving a block of memory 57 * at the start of physical memory, kdump, ...), the traditional method is 58 * always used if it yields a valid address. 59 * 60 * Return value: start address of physical memory to use 61 */ --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org