Hi Lorenzo, Thank you for the patch! Yet something to improve: [auto build test ERROR on robh/for-next] [also build test ERROR on pm/linux-next iommu/next linus/master v5.7 next-20200529] [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/Lorenzo-Pieralisi/ACPI-OF-Upgrade-MSI-IOMMU-ID-mapping-APIs/20200521-210259 base: https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next config: arm-allyesconfig (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0 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 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot All errors (new ones prefixed by >>, old ones prefixed by <<): drivers/irqchip/irq-gic-v3-its-fsl-mc-msi.c:109:33: warning: 'union acpi_subtable_headers' declared inside parameter list will not be visible outside of this definition or declaration 109 | its_fsl_mc_msi_parse_madt(union acpi_subtable_headers *header, | ^~~~~~~~~~~~~~~~~~~~~ drivers/irqchip/irq-gic-v3-its-fsl-mc-msi.c: In function 'its_fsl_mc_acpi_msi_init': >> drivers/irqchip/irq-gic-v3-its-fsl-mc-msi.c:139:2: error: implicit declaration of function 'acpi_table_parse_madt'; did you mean 'acpi_table_parse'? [-Werror=implicit-function-declaration] 139 | acpi_table_parse_madt(ACPI_MADT_TYPE_GENERIC_TRANSLATOR, | ^~~~~~~~~~~~~~~~~~~~~ | acpi_table_parse cc1: some warnings being treated as errors vim +139 drivers/irqchip/irq-gic-v3-its-fsl-mc-msi.c 135 136 137 static int __init its_fsl_mc_acpi_msi_init(void) 138 { > 139 acpi_table_parse_madt(ACPI_MADT_TYPE_GENERIC_TRANSLATOR, 140 its_fsl_mc_msi_parse_madt, 0); 141 142 return 0; 143 } 144 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org