CONFIG_ARC_STACK_NONEXEC is not available for thedefaultarchitecture x86.
Result is shown for architecture arc
default or selected kernelversion does not have config value CONFIG_ARC_STACK_NONEXEC.
Result is shown for kernelversion 6.2.5

Make stack non-executable


Linux Kernel Configuration
└─>ARC Architecture Configuration
└─>Make stack non-executable
In linux kernel since version 3.1 (release Date: 2011-10-24)  
To disable the execute permissions of stack/heap of processes
which are enabled by default.