Symbol: IRQ_EVTCHN
sys/x86/x86/local_apic.c
1878
if (irq == IRQ_EVTCHN)
sys/x86/x86/local_apic.c
737
lapics[apic_id].la_ioint_irqs[IDT_EVTCHN - APIC_IO_INTS] = IRQ_EVTCHN;