CONFIG_ARM64_USE_LSE_ATOMICS is not available for thedefaultarchitecture x86.
Result is shown for architecture arm64

Atomic instructions


Linux Kernel Configuration
└─>Kernel Features
└─>ARMv8.1 architectural features
└─>Atomic instructions
In linux kernel since version 5.1 (release Date: 2019-05-05)  
As part of the Large System Extensions, ARMv8.1 introduces new
atomic instructions that are designed specifically to scale in
very large systems.

Say Y here to make use of these instructions for the in-kernel
atomic routines. This incurs a small overhead on CPUs that do
not support these instructions and requires the kernel to be
built with binutils >= 2.25 in order for the new instructions
to be used.