Hi Christophe, I love your patch! Yet something to improve: [auto build test ERROR on powerpc/next] [also build test ERROR on v5.16 next-20220121] [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/Christophe-Leroy/powerpc-vdso-au... base: https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next config: powerpc-allyesconfig (https://download.01.org/0day-ci/archive/20220121/202201212332.oy8FMnno-lk...) compiler: powerpc-linux-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://github.com/0day-ci/linux/commit/09651dc41aab619a025925ace9f5b81e4... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Christophe-Leroy/powerpc-vdso-augment-VDSO32-functions-to-support-64-bits-build/20220121-180748 git checkout 09651dc41aab619a025925ace9f5b81e478e7334 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=powerpc prepare 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 >>): arch/powerpc/kernel/vdso/gettimeofday.S: Assembler messages: make[2]: *** [arch/powerpc/kernel/vdso/Makefile:71: arch/powerpc/kernel/vdso/gettimeofday-32.o] Error 1 make[2]: Target 'include/generated/vdso32-offsets.h' not remade because of errors. make[1]: *** [arch/powerpc/Makefile:423: vdso_prepare] Error 2 make[1]: Target 'prepare' not remade because of errors. make: *** [Makefile:219: __sub-make] Error 2 make: Target 'prepare' not remade because of errors. vim +68 arch/powerpc/kernel/vdso/gettimeofday.S a7f290dad32ee3 arch/powerpc/kernel/vdso32/gettimeofday.S Benjamin Herrenschmidt 2005-11-11 59 a7f290dad32ee3 arch/powerpc/kernel/vdso32/gettimeofday.S Benjamin Herrenschmidt 2005-11-11 60 fcb41a2030abe0 arch/powerpc/kernel/vdso32/gettimeofday.S Adhemerval Zanella 2013-04-22 61 /* fcb41a2030abe0 arch/powerpc/kernel/vdso32/gettimeofday.S Adhemerval Zanella 2013-04-22 62 * Exact prototype of time() fcb41a2030abe0 arch/powerpc/kernel/vdso32/gettimeofday.S Adhemerval Zanella 2013-04-22 63 * fcb41a2030abe0 arch/powerpc/kernel/vdso32/gettimeofday.S Adhemerval Zanella 2013-04-22 64 * time_t time(time *t); fcb41a2030abe0 arch/powerpc/kernel/vdso32/gettimeofday.S Adhemerval Zanella 2013-04-22 65 * fcb41a2030abe0 arch/powerpc/kernel/vdso32/gettimeofday.S Adhemerval Zanella 2013-04-22 66 */ fcb41a2030abe0 arch/powerpc/kernel/vdso32/gettimeofday.S Adhemerval Zanella 2013-04-22 67 V_FUNCTION_BEGIN(__kernel_time) ab037dd87a2f94 arch/powerpc/kernel/vdso32/gettimeofday.S Christophe Leroy 2020-11-27 @68 cvdso_call_time __c_kernel_time fcb41a2030abe0 arch/powerpc/kernel/vdso32/gettimeofday.S Adhemerval Zanella 2013-04-22 69 V_FUNCTION_END(__kernel_time) 08c18b63d9656e arch/powerpc/kernel/vdso32/gettimeofday.S Christophe Leroy 2021-03-09 70 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org