tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 4112a8699ae2eac797415b9be1d7901b3f79e772 commit: 73289afe03619bac585b69f563d0bb9a52e67722 [6949/9472] drm: Remove linux/fb.h from drm_crtc.h config: sparc-allyesconfig (https://download.01.org/0day-ci/archive/20220712/202207121410.tRazSVci-lkp@xxxxxxxxx/config) compiler: sparc64-linux-gcc (GCC) 11.3.0 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://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=73289afe03619bac585b69f563d0bb9a52e67722 git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout 73289afe03619bac585b69f563d0bb9a52e67722 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=sparc SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> Note: the linux-next/master HEAD 4112a8699ae2eac797415b9be1d7901b3f79e772 builds fine. It may have been fixed somewhere. All errors (new ones prefixed by >>): drivers/gpu/drm/xlnx/zynqmp_dp.c: In function 'zynqmp_dp_write': >> drivers/gpu/drm/xlnx/zynqmp_dp.c:335:9: error: implicit declaration of function 'writel' [-Werror=implicit-function-declaration] 335 | writel(val, dp->iomem + offset); | ^~~~~~ drivers/gpu/drm/xlnx/zynqmp_dp.c: In function 'zynqmp_dp_read': >> drivers/gpu/drm/xlnx/zynqmp_dp.c:340:16: error: implicit declaration of function 'readl' [-Werror=implicit-function-declaration] 340 | return readl(dp->iomem + offset); | ^~~~~ cc1: some warnings being treated as errors vim +/writel +335 drivers/gpu/drm/xlnx/zynqmp_dp.c d76271d22694e8 Hyun Kwon 2018-07-07 332 d76271d22694e8 Hyun Kwon 2018-07-07 333 static void zynqmp_dp_write(struct zynqmp_dp *dp, int offset, u32 val) d76271d22694e8 Hyun Kwon 2018-07-07 334 { d76271d22694e8 Hyun Kwon 2018-07-07 @335 writel(val, dp->iomem + offset); d76271d22694e8 Hyun Kwon 2018-07-07 336 } d76271d22694e8 Hyun Kwon 2018-07-07 337 d76271d22694e8 Hyun Kwon 2018-07-07 338 static u32 zynqmp_dp_read(struct zynqmp_dp *dp, int offset) d76271d22694e8 Hyun Kwon 2018-07-07 339 { d76271d22694e8 Hyun Kwon 2018-07-07 @340 return readl(dp->iomem + offset); d76271d22694e8 Hyun Kwon 2018-07-07 341 } d76271d22694e8 Hyun Kwon 2018-07-07 342 :::::: The code at line 335 was first introduced by commit :::::: d76271d22694e874ed70791702db9252ffe96a4c drm: xlnx: DRM/KMS driver for Xilinx ZynqMP DisplayPort Subsystem :::::: TO: Hyun Kwon <hyun.kwon@xxxxxxxxxx> :::::: CC: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> -- 0-DAY CI Kernel Test Service https://01.org/lkp