On 8/21/2021 4:45 PM, Geert Uytterhoeven wrote: > Dear Robot, > > On Sat, Aug 14, 2021 at 7:43 AM kernel test robot wrote: >> FYI, the error/warning still remains. > > Yes, and that's fine, as this function is never called from C code, > only from assembler. Hi Geert, Thanks for the feedback, we'll ignore this warning. Best Regards, Rong Chen > >> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master >> head: dfa377c35d70c31139b1274ec49f87d380996c42 >> commit: 0673cb38951215060d7993b43ad3c45cd413c2c3 ARM: 9045/1: uncompress: Validate start of physical memory against passed DTB >> date: 6 months ago >> config: arm-randconfig-r003-20210814 (attached as .config) >> compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 62df4df41c939205b2dc0a2a3bfb75b8c1ed74fa) >> 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=0673cb38951215060d7993b43ad3c45cd413c2c3 >> 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=clang make.cross ARCH=arm >> >> If you fix the issue, kindly add following tag as appropriate >> Reported-by: kernel test robot >> >> All warnings (new ones prefixed by >>): >> >>>> arch/arm/boot/compressed/fdt_check_mem_start.c:62:10: warning: no previous prototype for function 'fdt_check_mem_start' [-Wmissing-prototypes] >> uint32_t fdt_check_mem_start(uint32_t mem_start, const void *fdt) >> ^ >> arch/arm/boot/compressed/fdt_check_mem_start.c:62:1: note: declare 'static' if the function is not intended to be used outside of this translation unit >> uint32_t fdt_check_mem_start(uint32_t mem_start, const void *fdt) >> ^ >> static >> 1 warning generated. >> >> >> 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 */ >> > 62 uint32_t fdt_check_mem_start(uint32_t mem_start, const void *fdt) >> >> --- >> 0-DAY CI Kernel Test Service, Intel Corporation >> https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org > > >