Hi Wei, I love your patch! Perhaps something to improve: [auto build test WARNING on tip/x86/core] [also build test WARNING on asm-generic/master iommu/next tip/timers/core pci/next linus/master v5.10-rc5] [cannot apply to next-20201124] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Wei-Liu/Introducing-Linux-root-partition-support-for-Microsoft-Hypervisor/20201125-011026 base: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git 238c91115cd05c71447ea071624a4c9fe661f970 config: x86_64-randconfig-a003-20201125 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 77e98eaee2e8d4b9b297b66fda5b1e51e2a69999) 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 x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # https://github.com/0day-ci/linux/commit/591ad2444b6b7d63ab24ce8f16a4e367085bbb5d 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/20201125-011026 git checkout 591ad2444b6b7d63ab24ce8f16a4e367085bbb5d # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 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:305:3: error: field designator 'domain_free_irqs' does not refer to any field in type 'struct msi_domain_ops' .domain_free_irqs = hv_msi_domain_free_irqs, ^ arch/x86/hyperv/irqdomain.c:318:28: warning: no previous prototype for function 'hv_create_pci_msi_domain' [-Wmissing-prototypes] struct irq_domain * __init hv_create_pci_msi_domain(void) ^ arch/x86/hyperv/irqdomain.c:318:1: note: declare 'static' if the function is not intended to be used outside of this translation unit struct irq_domain * __init hv_create_pci_msi_domain(void) ^ static >> arch/x86/hyperv/irqdomain.c:499:6: warning: no previous prototype for function 'hv_ioapic_ack_level' [-Wmissing-prototypes] void hv_ioapic_ack_level(struct irq_data *irq_data) ^ arch/x86/hyperv/irqdomain.c:499:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void hv_ioapic_ack_level(struct irq_data *irq_data) ^ static >> arch/x86/hyperv/irqdomain.c:526:5: warning: no previous prototype for function 'hv_acpi_register_gsi' [-Wmissing-prototypes] int hv_acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) ^ arch/x86/hyperv/irqdomain.c:526:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int hv_acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) ^ static >> arch/x86/hyperv/irqdomain.c:550:6: warning: no previous prototype for function 'hv_acpi_unregister_gsi' [-Wmissing-prototypes] void hv_acpi_unregister_gsi(u32 gsi) ^ arch/x86/hyperv/irqdomain.c:550:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void hv_acpi_unregister_gsi(u32 gsi) ^ static 4 warnings and 1 error generated. vim +/hv_ioapic_ack_level +499 arch/x86/hyperv/irqdomain.c 498 > 499 void hv_ioapic_ack_level(struct irq_data *irq_data) 500 { 501 /* 502 * Per email exchange with Hyper-V team, all is needed is write to 503 * LAPIC's EOI register. They don't support directed EOI to IO-APIC. 504 * Hyper-V handles it for us. 505 */ 506 apic_ack_irq(irq_data); 507 } 508 509 struct irq_chip hv_ioapic_chip __read_mostly = { 510 .name = "HV-IO-APIC", 511 .irq_startup = hv_ioapic_startup_irq, 512 .irq_mask = hv_ioapic_mask_irq, 513 .irq_unmask = hv_ioapic_unmask_irq, 514 .irq_ack = irq_chip_ack_parent, 515 .irq_eoi = hv_ioapic_ack_level, 516 .irq_set_affinity = hv_ioapic_set_affinity, 517 .irq_retrigger = irq_chip_retrigger_hierarchy, 518 .irq_get_irqchip_state = ioapic_irq_get_chip_state, 519 .flags = IRQCHIP_SKIP_SET_WAKE, 520 }; 521 522 523 int (*native_acpi_register_gsi)(struct device *dev, u32 gsi, int trigger, int polarity); 524 void (*native_acpi_unregister_gsi)(u32 gsi); 525 > 526 int hv_acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 527 { 528 int irq = gsi; 529 530 #ifdef CONFIG_X86_IO_APIC 531 irq = native_acpi_register_gsi(dev, gsi, trigger, polarity); 532 if (irq < 0) { 533 pr_err("native_acpi_register_gsi failed %d\n", irq); 534 return irq; 535 } 536 537 if (trigger) { 538 irq_set_status_flags(irq, IRQ_LEVEL); 539 irq_set_chip_and_handler_name(irq, &hv_ioapic_chip, 540 handle_fasteoi_irq, "ioapic-fasteoi"); 541 } else { 542 irq_clear_status_flags(irq, IRQ_LEVEL); 543 irq_set_chip_and_handler_name(irq, &hv_ioapic_chip, 544 handle_edge_irq, "ioapic-edge"); 545 } 546 #endif 547 return irq; 548 } 549 > 550 void hv_acpi_unregister_gsi(u32 gsi) --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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