Hi "Stephan, Thank you for the patch! Yet something to improve: [auto build test ERROR on char-misc/char-misc-testing] [also build test ERROR on cryptodev/master crypto/master v5.9-rc1 next-20200821] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Stephan-M-ller/dev-random-a-new-... base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git d162219c655c8cf8003128a13840d6c1e183fb80 config: arm64-randconfig-s031-20200821 (attached as .config) compiler: aarch64-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.2-191-g10164920-dirty # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=arm64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): aarch64-linux-ld: drivers/char/lrng/lrng_sw_noise.o: in function `add_interrupt_randomness': drivers/char/lrng/lrng_sw_noise.c:113:(.text+0x280): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `lrng_raw_irqflags_entropy_store' drivers/char/lrng/lrng_sw_noise.c:115:(.text+0x2b4): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `lrng_raw_retip_entropy_store' aarch64-linux-ld: drivers/char/lrng/lrng_sw_noise.c:131: undefined reference to `lrng_raw_retip_entropy_store' drivers/char/lrng/lrng_sw_noise.c:131:(.text+0x368): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `lrng_raw_retip_entropy_store' drivers/char/lrng/lrng_sw_noise.c:146:(.text+0x3d4): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `lrng_raw_jiffies_entropy_store' drivers/char/lrng/lrng_sw_noise.c:149:(.text+0x3f0): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `lrng_raw_irqflags_entropy_store' aarch64-linux-ld: drivers/char/lrng/lrng_sw_noise.c:152: undefined reference to `lrng_raw_retip_entropy_store' drivers/char/lrng/lrng_sw_noise.c:152:(.text+0x40c): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `lrng_raw_retip_entropy_store' sparse warnings: (new ones prefixed by >>) # https://github.com/0day-ci/linux/commit/04c2864db01edca77a5a59da7b074dc19... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Stephan-M-ller/dev-random-a-new-approach-with-full-SP800-90B-compliance/20200821-140523 git checkout 04c2864db01edca77a5a59da7b074dc191a30dd8 vim +53 drivers/char/lrng/lrng_selftest.c 46 47 static inline void lrng_selftest_bswap32(u32 *ptr, u32 words) 48 { 49 u32 i; 50 51 /* Byte-swap data which is an LE representation */ 52 for (i = 0; i < words; i++) { 54 ptr++; 55 } 56 } 57 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org