Hi Atish, Thank you for the patch! Yet something to improve: [auto build test ERROR on linus/master] [also build test ERROR on v5.7-rc1 next-20200413] [cannot apply to efi/next arm/for-next arm64/for-next/core linux/master] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Atish-Patra/Add-UEFI-support-for-RISC-V/20200414-053224 base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 8f3d9f354286745c751374f5f1fcafee6b3f3136 config: riscv-allyesconfig (attached as .config) compiler: riscv64-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 # save the attached .config to linux build tree GCC_VERSION=9.3.0 make.cross ARCH=riscv If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot All errors (new ones prefixed by >>): drivers/video/fbdev/efifb.c: In function 'efifb_setup': >> drivers/video/fbdev/efifb.c:275:4: error: implicit declaration of function 'efifb_setup_from_dmi' [-Werror=implicit-function-declaration] 275 | efifb_setup_from_dmi(&screen_info, this_opt); | ^~~~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +/efifb_setup_from_dmi +275 drivers/video/fbdev/efifb.c 7c83172b98e569 drivers/video/efifb.c Huang, Ying 2007-11-28 266 e6816a8d855494 drivers/video/efifb.c David Herrmann 2013-08-02 267 static int efifb_setup(char *options) 7c08c9ae0c1458 drivers/video/efifb.c Peter Jones 2008-10-15 268 { 7c08c9ae0c1458 drivers/video/efifb.c Peter Jones 2008-10-15 269 char *this_opt; 7c08c9ae0c1458 drivers/video/efifb.c Peter Jones 2008-10-15 270 b4aa0163056b6c drivers/video/efifb.c Matthew Garrett 2012-04-16 271 if (options && *options) { 7c08c9ae0c1458 drivers/video/efifb.c Peter Jones 2008-10-15 272 while ((this_opt = strsep(&options, ",")) != NULL) { 7c08c9ae0c1458 drivers/video/efifb.c Peter Jones 2008-10-15 273 if (!*this_opt) continue; 7c08c9ae0c1458 drivers/video/efifb.c Peter Jones 2008-10-15 274 21289ec02b41c4 drivers/video/fbdev/efifb.c Ard Biesheuvel 2016-04-25 @275 efifb_setup_from_dmi(&screen_info, this_opt); 21289ec02b41c4 drivers/video/fbdev/efifb.c Ard Biesheuvel 2016-04-25 276 7c08c9ae0c1458 drivers/video/efifb.c Peter Jones 2008-10-15 277 if (!strncmp(this_opt, "base:", 5)) 7c08c9ae0c1458 drivers/video/efifb.c Peter Jones 2008-10-15 278 screen_info.lfb_base = simple_strtoul(this_opt+5, NULL, 0); 7c08c9ae0c1458 drivers/video/efifb.c Peter Jones 2008-10-15 279 else if (!strncmp(this_opt, "stride:", 7)) 7c08c9ae0c1458 drivers/video/efifb.c Peter Jones 2008-10-15 280 screen_info.lfb_linelength = simple_strtoul(this_opt+7, NULL, 0) * 4; 7c08c9ae0c1458 drivers/video/efifb.c Peter Jones 2008-10-15 281 else if (!strncmp(this_opt, "height:", 7)) 7c08c9ae0c1458 drivers/video/efifb.c Peter Jones 2008-10-15 282 screen_info.lfb_height = simple_strtoul(this_opt+7, NULL, 0); 7c08c9ae0c1458 drivers/video/efifb.c Peter Jones 2008-10-15 283 else if (!strncmp(this_opt, "width:", 6)) 7c08c9ae0c1458 drivers/video/efifb.c Peter Jones 2008-10-15 284 screen_info.lfb_width = simple_strtoul(this_opt+6, NULL, 0); dd0c41f8a7e0ba drivers/video/fbdev/efifb.c Dave Airlie 2017-07-31 285 else if (!strcmp(this_opt, "nowc")) 38ac0287b7f4f3 drivers/video/fbdev/efifb.c Ard Biesheuvel 2018-07-11 286 mem_flags &= ~EFI_MEMORY_WC; cf7389b8095fab drivers/video/fbdev/efifb.c Hans de Goede 2018-09-26 287 else if (!strcmp(this_opt, "nobgrt")) cf7389b8095fab drivers/video/fbdev/efifb.c Hans de Goede 2018-09-26 288 use_bgrt = false; 7c08c9ae0c1458 drivers/video/efifb.c Peter Jones 2008-10-15 289 } b4aa0163056b6c drivers/video/efifb.c Matthew Garrett 2012-04-16 290 } b4aa0163056b6c drivers/video/efifb.c Matthew Garrett 2012-04-16 291 7c08c9ae0c1458 drivers/video/efifb.c Peter Jones 2008-10-15 292 return 0; 7c08c9ae0c1458 drivers/video/efifb.c Peter Jones 2008-10-15 293 } 7c08c9ae0c1458 drivers/video/efifb.c Peter Jones 2008-10-15 294 :::::: The code at line 275 was first introduced by commit :::::: 21289ec02b41c4b928a0b3de1778b325d714eea3 x86/efi/efifb: Move DMI based quirks handling out of generic code :::::: TO: Ard Biesheuvel :::::: CC: Ingo Molnar --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org