Extern or forward variable declaration at include/linux/msi.h, line 191 References: arch/arm/mach-integrator/pci_v3.c, line 770 arch/powerpc/sysdev/mpic_msi.c, line 36 arch/sparc/kernel/pci_fire.c, line 415 arch/sparc/kernel/pci_fire.c, line 459 arch/sparc/kernel/pci_psycho.c, line 510 arch/sparc/kernel/pci_sabre.c, line 314 arch/sparc/kernel/pci_sabre.c, line 460 arch/sparc/kernel/pci_sabre.c, line 471 arch/sparc/kernel/pci_schizo.c, line 1314 arch/sparc/kernel/pci_schizo.c, line 1415 arch/sparc/kernel/psycho_common.c, line 453 arch/x86/kernel/devicetree.c, line 71 arch/x86/kernel/devicetree.c, line 73 arch/x86/kernel/devicetree.c, line 122 arch/x86/kernel/devicetree.c, line 141 arch/x86/kernel/devicetree.c, line 226 arch/x86/kernel/devicetree.c, line 247 drivers/irqchip/irq-alpine-msi.c, line 191 drivers/irqchip/irq-alpine-msi.c, line 194 drivers/irqchip/irq-alpine-msi.c, line 230 drivers/irqchip/irq-alpine-msi.c, line 231 drivers/irqchip/irq-gic-v3-its-platform-msi.c, line 78 drivers/irqchip/irq-mbigen.c, line 244 drivers/irqchip/irq-mvebu-odmi.c, line 161 drivers/irqchip/irq-mvebu-odmi.c, line 162 drivers/of/of_pci_irq.c, line 19 drivers/pci/host/pci-xgene-msi.c, line 42 drivers/pci/host/pcie-iproc-msi.c, line 443 drivers/pci/host/pcie-iproc-msi.c, line 516 drivers/pci/of.c, line 48