CONFIG_ARC_HAS_REENTRANT_IRQ_LV2 is not available for thedefaultarchitecture x86.
Result is shown for architecture arc
default or selected kernelversion does not have config value CONFIG_ARC_HAS_REENTRANT_IRQ_LV2.
Result is shown for kernelversion 6.5.1

CONFIG_ARC_HAS_REENTRANT_IRQ_LV2 (not configurable)

configname: CONFIG_ARC_HAS_REENTRANT_IRQ_LV2

Linux Kernel Configuration
└─>ARC Architecture Configuration
└─>ARC CPU Configuration
└─>ARC_HAS_REENTRANT_IRQ_LV2
In linux kernel since version 3.1 (release Date: 2011-10-24)  
depends
CONFIG_SMP