Hi Hoegeun, FYI, the error/warning still remains.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: ea094f3c830a67f252677aacba5d04ebcf55c4d9 commit: ed29f9426d9bf1b5ec7e79dfb28f39de7b3a0069 drm/panel: Add support for S6E3HA2 panel driver on TM2 board date: 8 weeks ago config: i386-randconfig-x0-06041640 (attached as .config) compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901 reproduce: git checkout ed29f9426d9bf1b5ec7e79dfb28f39de7b3a0069 # save the attached .config to linux build tree make ARCH=i386 All errors (new ones prefixed by >>): drivers/built-in.o: In function `s6e3ha2_remove': >> panel-samsung-s6e3ha2.c:(.text+0x156ba0): undefined reference to >> `backlight_device_unregister' drivers/built-in.o: In function `s6e3ha2_probe': >> panel-samsung-s6e3ha2.c:(.text+0x15768b): undefined reference to >> `backlight_device_register' panel-samsung-s6e3ha2.c:(.text+0x157728): undefined reference to `backlight_device_unregister' --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
.config.gz
Description: application/gzip
