tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: b741596468b010af2846b75f5e75a842ce344a6e commit: 421015713b306e47af95d4d61cdfbd96d462e4cb ARM: 9017/2: Enable KASan for ARM date: 6 months ago config: arm-randconfig-r015-20210509 (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0 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=421015713b306e47af95d4d61cdfbd96d462e4cb git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 421015713b306e47af95d4d61cdfbd96d462e4cb # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross W=1 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/decompress.c:50: warning: "memmove" redefined 50 | #define memmove memmove | In file included from arch/arm/boot/compressed/decompress.c:8: arch/arm/include/asm/string.h:59: note: this is the location of the previous definition 59 | #define memmove(dst, src, len) __memmove(dst, src, len) | arch/arm/boot/compressed/decompress.c:51: warning: "memcpy" redefined 51 | #define memcpy memcpy | In file included from arch/arm/boot/compressed/decompress.c:8: arch/arm/include/asm/string.h:58: note: this is the location of the previous definition 58 | #define memcpy(dst, src, len) __memcpy(dst, src, len) | arch/arm/boot/compressed/decompress.c:59:5: warning: no previous prototype for 'do_decompress' [-Wmissing-prototypes] 59 | int do_decompress(u8 *input, int len, u8 *output, void (*error)(char *x)) | ^~~~~~~~~~~~~ vim +/memmove +50 arch/arm/boot/compressed/decompress.c 6e8699f7d68589 Albin Tonnerre 2010-04-03 48 a7f464f3db93ae Imre Kaloz 2012-01-26 49 #ifdef CONFIG_KERNEL_XZ a7f464f3db93ae Imre Kaloz 2012-01-26 @50 #define memmove memmove a7f464f3db93ae Imre Kaloz 2012-01-26 51 #define memcpy memcpy a7f464f3db93ae Imre Kaloz 2012-01-26 52 #include "../../../../lib/decompress_unxz.c" a7f464f3db93ae Imre Kaloz 2012-01-26 53 #endif a7f464f3db93ae Imre Kaloz 2012-01-26 54 :::::: The code at line 50 was first introduced by commit :::::: a7f464f3db93ae5492bee6f6e48939fd8a45fa99 ARM: 7001/2: Wire up support for the XZ decompressor :::::: TO: Imre Kaloz :::::: CC: Russell King --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org