CONFIG_HAVE_SOFTIRQ_ON_OWN_STACK (not configurable)

configname: CONFIG_HAVE_SOFTIRQ_ON_OWN_STACK

Linux Kernel Configuration
└─>General architecture-dependent options
└─>HAVE_SOFTIRQ_ON_OWN_STACK
In linux kernel since version 5.2 (release Date: 2019-07-07)  
Architecture provides a function to run __do_softirq() on a
seperate stack.