IO_APIC_VECTOR_LIMIT 159 arch/x86/include/asm/irq_vectors.h (CPU_VECTOR_LIMIT > IO_APIC_VECTOR_LIMIT ? \ IO_APIC_VECTOR_LIMIT 161 arch/x86/include/asm/irq_vectors.h (NR_VECTORS + IO_APIC_VECTOR_LIMIT))