CONFIG_MN10300_HAS_ATOMIC_OPS_UNIT is not available for thedefaultarchitecture x86.
Result is shown for architecture mn10300
default or selected kernelversion does not have config value CONFIG_MN10300_HAS_ATOMIC_OPS_UNIT.
Result is shown for kernelversion 6.7-rc3

CONFIG_MN10300_HAS_ATOMIC_OPS_UNIT (not configurable)

configname: CONFIG_MN10300_HAS_ATOMIC_OPS_UNIT

Linux Kernel Configuration
└─>Panasonic MN10300 system setup
└─>MN10300_HAS_ATOMIC_OPS_UNIT
In linux kernel since version 2.6.37 (release Date: 2011-01-04)  
This should be enabled if the processor has an atomic ops unit
capable of doing LL/SC equivalent operations.