tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 7c5e07b73ff3011c9b82d4a3286a3362b951ad2b commit: e302eea8f49717253ac64fd45b7cc719e87fa010 [6932/13542] ACPI/IORT: Add a helper to retrieve RMR info directly config: arm64-buildonly-randconfig-r005-20220728 (https://download.01.org/0day-ci/archive/20220729/202207291335.1sImjcbY-lkp@xxxxxxxxx/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 8dfaecc4c24494337933aff9d9166486ca0949f1) 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 # install arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=e302eea8f49717253ac64fd45b7cc719e87fa010 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 e302eea8f49717253ac64fd45b7cc719e87fa010 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash drivers/acpi/ If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): >> drivers/acpi/arm64/iort.c:1406:2: error: call to undeclared function 'iort_iommu_rmr_get_resv_regions'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] iort_iommu_rmr_get_resv_regions(iommu_fwnode, NULL, head); ^ drivers/acpi/arm64/iort.c:1406:2: note: did you mean 'iort_iommu_get_resv_regions'? drivers/acpi/arm64/iort.c:1329:6: note: 'iort_iommu_get_resv_regions' declared here void iort_iommu_get_resv_regions(struct device *dev, struct list_head *head) ^ 1 error generated. vim +/iort_iommu_rmr_get_resv_regions +1406 drivers/acpi/arm64/iort.c 1396 1397 /** 1398 * iort_get_rmr_sids - Retrieve IORT RMR node reserved regions with 1399 * associated StreamIDs information. 1400 * @iommu_fwnode: fwnode associated with IOMMU 1401 * @head: Resereved region list 1402 */ 1403 void iort_get_rmr_sids(struct fwnode_handle *iommu_fwnode, 1404 struct list_head *head) 1405 { > 1406 iort_iommu_rmr_get_resv_regions(iommu_fwnode, NULL, head); 1407 } 1408 EXPORT_SYMBOL_GPL(iort_get_rmr_sids); 1409 -- 0-DAY CI Kernel Test Service https://01.org/lkp