CONFIG_IRQ_CPU is not available for thedefaultarchitecture x86.
Result is shown for architecture mips
CONFIG_IRQ_CPU (not configurable)
modulename: irq_cpu.ko
configname: CONFIG_IRQ_CPU
Linux/MIPS Kernel Configuration
└─>IRQ_CPU
In linux kernel since version 2.6.12
source code:
selects
CONFIG_IRQ_DOMAIN