Hi Sunil, Thank you for the patch! Yet something to improve: [auto build test ERROR on e4e737bb5c170df6135a127739a9e6148ee3da82] url: https://github.com/0day-ci/linux/commits/Sunil-Muthuswamy/PCI-hv-Hyper-V-... base: e4e737bb5c170df6135a127739a9e6148ee3da82 config: x86_64-rhel-8.3-kselftests (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://github.com/0day-ci/linux/commit/8f266a9b41d3dfc1600cecaba80ea116d... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Sunil-Muthuswamy/PCI-hv-Hyper-V-vPCI-for-ARM64/20211009-012330 git checkout 8f266a9b41d3dfc1600cecaba80ea116dc6edf27 # save the attached .config to linux build tree make W=1 ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All error/warnings (new ones prefixed by >>, old ones prefixed by <<): 18 | int hv_pci_irqchip_init(struct irq_domain **parent_domain, | ^~~~~~~~~~~~~~~~~~~ 29 | void hv_pci_irqchip_free(void) {} | ^~~~~~~~~~~~~~~~~~~ 31 | unsigned int hv_msi_get_int_vector(struct irq_data *data) | ^~~~~~~~~~~~~~~~~~~~~ 38 | void hv_set_msi_entry_from_desc(union hv_msi_entry *msi_entry, | ^~~~~~~~~~~~~~~~~~~~~~~~~~ 45 | int hv_msi_prepare(struct irq_domain *domain, struct device *dev, | ^~~~~~~~~~~~~~ -- ERROR: modpost: missing MODULE_LICENSE() in drivers/pci/controller/pci-hyperv-irqchip.o --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org