Hi Kernel Test Robot, On Sat, Jun 26, 2021 at 1:36 AM kernel test robot <lkp@xxxxxxxxx> wrote: > I love your patch! Yet something to improve: > > [auto build test ERROR on robh/for-next] > [also build test ERROR on staging/staging-testing linus/master v5.13-rc7 next-20210625] > [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/Geert-Uytterhoeven/auxdisplay-ht16k33-Add-character-display-support/20210625-210014 > base: https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next > config: powerpc-allmodconfig (attached as .config) > compiler: powerpc64-linux-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://github.com/0day-ci/linux/commit/5505aedee505055e2fe16a718203e24fd8519e2a > git remote add linux-review https://github.com/0day-ci/linux > git fetch --no-tags linux-review Geert-Uytterhoeven/auxdisplay-ht16k33-Add-character-display-support/20210625-210014 > git checkout 5505aedee505055e2fe16a718203e24fd8519e2a > # save the attached .config to linux build tree > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=powerpc > > If you fix the issue, kindly add following tag as appropriate > Reported-by: kernel test robot <lkp@xxxxxxxxx> > > All errors (new ones prefixed by >>, old ones prefixed by <<): > > >> ERROR: modpost: ".kernfs_create_link" [drivers/auxdisplay/img-ascii-lcd.ko] undefined! Thanks a lot! This helped me finding compat_only_sysfs_link_entry_to_kobj(), which I hadn't found before, and which does an even better job than my custom sysfs_create_file_link() implementation. Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds
