Hi Wei, I love your patch! Perhaps something to improve: [auto build test WARNING on e71ba9452f0b5b2e8dc8aa5445198cd9214a6a62] url: https://github.com/0day-ci/linux/commits/Wei-Liu/Introducing-Linux-root-partition-support-for-Microsoft-Hypervisor/20210107-044149 base: e71ba9452f0b5b2e8dc8aa5445198cd9214a6a62 config: i386-randconfig-m021-20210106 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce (this is a W=1 build): # https://github.com/0day-ci/linux/commit/376aee69c6ab18dc23b0386590bee82d59555be8 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Wei-Liu/Introducing-Linux-root-partition-support-for-Microsoft-Hypervisor/20210107-044149 git checkout 376aee69c6ab18dc23b0386590bee82d59555be8 # save the attached .config to linux build tree make W=1 ARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> arch/x86/hyperv/irqdomain.c:317:28: warning: no previous prototype for 'hv_create_pci_msi_domain' [-Wmissing-prototypes] 317 | struct irq_domain * __init hv_create_pci_msi_domain(void) | ^~~~~~~~~~~~~~~~~~~~~~~~ vim +/hv_create_pci_msi_domain +317 arch/x86/hyperv/irqdomain.c 316 > 317 struct irq_domain * __init hv_create_pci_msi_domain(void) 318 { 319 struct irq_domain *d = NULL; 320 struct fwnode_handle *fn; 321 322 fn = irq_domain_alloc_named_fwnode("HV-PCI-MSI"); 323 if (fn) 324 d = pci_msi_create_irq_domain(fn, &hv_pci_msi_domain_info, x86_vector_domain); 325 326 /* No point in going further if we can't get an irq domain */ 327 BUG_ON(!d); 328 329 return d; 330 } 331 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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