CONFIG_PPC_HAS_LBARX_LHARX is not available for thedefaultarchitecture x86.
Result is shown for architecture powerpc

CONFIG_PPC_HAS_LBARX_LHARX (not configurable)

configname: CONFIG_PPC_HAS_LBARX_LHARX

Linux Kernel Configuration
└─>PPC_HAS_LBARX_LHARX
In linux kernel since version 6.2 (release Date: 2023-02-19)