tree: https://chromium.googlesource.com/chromiumos/third_party/kernel chromeos-5.10 head: ae25dd46c5c2fecb4868af3a91418dea519deac9 commit: ae25dd46c5c2fecb4868af3a91418dea519deac9 [1/1] CHROMIUM: Import latest evdi driver config: alpha-allyesconfig (attached as .config) compiler: alpha-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 git remote add chrome-os https://chromium.googlesource.com/chromiumos/third_party/kernel git fetch --no-tags chrome-os chromeos-5.10 git checkout ae25dd46c5c2fecb4868af3a91418dea519deac9 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=alpha If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): drivers/gpu/drm/evdi/evdi_gem.c: In function 'evdi_gem_vmap': drivers/gpu/drm/evdi/evdi_gem.c:253:25: error: implicit declaration of function 'vmap'; did you mean 'kmap'? [-Werror=implicit-function-declaration] 253 | obj->vmapping = vmap(obj->pages, page_count, 0, PAGE_KERNEL); | ^~~~ | kmap 253 | obj->vmapping = vmap(obj->pages, page_count, 0, PAGE_KERNEL); | ^ drivers/gpu/drm/evdi/evdi_gem.c: In function 'evdi_gem_vunmap': drivers/gpu/drm/evdi/evdi_gem.c:274:17: error: implicit declaration of function 'vunmap'; did you mean 'kunmap'? [-Werror=implicit-function-declaration] 274 | vunmap(obj->vmapping); | ^~~~~~ | kunmap cc1: some warnings being treated as errors vim +253 drivers/gpu/drm/evdi/evdi_gem.c 3e21cedd503fab Aleksander Miera 2018-03-15 227 3e21cedd503fab Aleksander Miera 2018-03-15 228 int evdi_gem_vmap(struct evdi_gem_object *obj) 3e21cedd503fab Aleksander Miera 2018-03-15 229 { 3e21cedd503fab Aleksander Miera 2018-03-15 230 int page_count = obj->base.size / PAGE_SIZE; 3e21cedd503fab Aleksander Miera 2018-03-15 231 int ret; 3e21cedd503fab Aleksander Miera 2018-03-15 232 3e21cedd503fab Aleksander Miera 2018-03-15 233 if (obj->base.import_attach) { 79e3410df198df Sean Paul 2021-04-09 234 #if KERNEL_VERSION(5, 10, 0) <= LINUX_VERSION_CODE 5d42c7b3d93d6c Sean Paul 2021-04-09 235 struct dma_buf_map map; 5d42c7b3d93d6c Sean Paul 2021-04-09 236 5d42c7b3d93d6c Sean Paul 2021-04-09 237 ret = dma_buf_vmap(obj->base.import_attach->dmabuf, &map); 5d42c7b3d93d6c Sean Paul 2021-04-09 238 if (ret) 5d42c7b3d93d6c Sean Paul 2021-04-09 239 return -ENOMEM; 5d42c7b3d93d6c Sean Paul 2021-04-09 240 obj->vmapping = map.vaddr; 5d42c7b3d93d6c Sean Paul 2021-04-09 241 #else 3e21cedd503fab Aleksander Miera 2018-03-15 242 obj->vmapping = dma_buf_vmap(obj->base.import_attach->dmabuf); 3e21cedd503fab Aleksander Miera 2018-03-15 243 if (!obj->vmapping) 3e21cedd503fab Aleksander Miera 2018-03-15 244 return -ENOMEM; 5d42c7b3d93d6c Sean Paul 2021-04-09 245 #endif 3e21cedd503fab Aleksander Miera 2018-03-15 246 return 0; 3e21cedd503fab Aleksander Miera 2018-03-15 247 } 3e21cedd503fab Aleksander Miera 2018-03-15 248 67442e0531eb83 Guenter Roeck 2020-11-04 249 ret = evdi_gem_get_pages(obj, GFP_KERNEL); 3e21cedd503fab Aleksander Miera 2018-03-15 250 if (ret) 3e21cedd503fab Aleksander Miera 2018-03-15 251 return ret; 3e21cedd503fab Aleksander Miera 2018-03-15 252 3e21cedd503fab Aleksander Miera 2018-03-15 @253 obj->vmapping = vmap(obj->pages, page_count, 0, PAGE_KERNEL); 3e21cedd503fab Aleksander Miera 2018-03-15 254 if (!obj->vmapping) 3e21cedd503fab Aleksander Miera 2018-03-15 255 return -ENOMEM; 3e21cedd503fab Aleksander Miera 2018-03-15 256 return 0; 3e21cedd503fab Aleksander Miera 2018-03-15 257 } 3e21cedd503fab Aleksander Miera 2018-03-15 258 :::::: The code at line 253 was first introduced by commit :::::: 3e21cedd503fabd195cf407652bf87fd83e202ac drm/evdi: Add atomic evdi drm module :::::: TO: Aleksander Miera <aleksander.miera(a)displaylink.com&gt; :::::: CC: Guenter Roeck <groeck(a)chromium.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org