Hi Matthew, FYI, the error/warning still remains. tree: https://github.com/intel/linux-intel-lts.git 5.10/yocto head: 92a130c4f25aedb3994ab18e243b82623c83e280 commit: 27ae0fd03f48a0699381fafa866f6977b3c3fcdc [19431/20367] drm/i915/guc: Implement multi-lrc submission config: i386-defconfig (https://download.01.org/0day-ci/archive/20220111/202201110408.soGswMkj-lk...) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://github.com/intel/linux-intel-lts/commit/27ae0fd03f48a0699381fafa8... git remote add intel-lts https://github.com/intel/linux-intel-lts.git git fetch --no-tags intel-lts 5.10/yocto git checkout 27ae0fd03f48a0699381fafa866f6977b3c3fcdc # save the config file to linux build tree mkdir build_dir make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): In file included from drivers/gpu/drm/i915/i915_drv.h:38, from drivers/gpu/drm/i915/gt/intel_context.h:14, from drivers/gpu/drm/i915/gem/i915_gem_context.h:12, from drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c:8: include/linux/io-mapping.h: In function 'io_mapping_map_local_wc': include/linux/io-mapping.h:88:9: error: implicit declaration of function '__iomap_local_pfn_prot'; did you mean '__kmap_local_pfn_prot'? [-Werror=implicit-function-declaration] 88 | return __iomap_local_pfn_prot(PHYS_PFN(phys_addr), mapping->prot); | ^~~~~~~~~~~~~~~~~~~~~~ | __kmap_local_pfn_prot include/linux/io-mapping.h:88:9: error: returning 'int' from a function with return type 'void *' makes pointer from integer without a cast [-Werror=int-conversion] 88 | return __iomap_local_pfn_prot(PHYS_PFN(phys_addr), mapping->prot); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c: At top level: 1470 | bool need_tasklet(struct intel_guc *guc, struct i915_request *rq) | ^~~~~~~~~~~~ cc1: all warnings being treated as errors vim +/need_tasklet +1470 drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c 1469 1471 { 1472 struct i915_sched_engine *sched_engine = rq->engine->sched_engine; 1473 struct intel_context *ce = request_to_scheduling_context(rq); 1474 1475 return submission_disabled(guc) || guc->stalled_request || 1476 !i915_sched_engine_is_empty(sched_engine) || 1477 !lrc_desc_registered(guc, ce->guc_id.id); 1478 } 1479 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org