CONFIG_WAR_R10000_LLSC is not available for thedefaultarchitecture x86.
Result is shown for architecture mips

CONFIG_WAR_R10000_LLSC (not configurable)

configname: CONFIG_WAR_R10000_LLSC

Linux Kernel Configuration
└─>Kernel type
└─>WAR_R10000_LLSC
In linux kernel since version 5.1 (release Date: 2019-05-05)