default or selected kernelversion does not have config value CONFIG_DEBUG_IOREMAP.
Result is shown for kernelversion 5.4.123

Enable ioremap() debugging


Linux Kernel Configuration
└─>Enable ioremap() debugging
In linux kernel since version 2.6.12  
Enabling this option will cause the kernel to distinguish between
ioremapped and physical addresses. It will print a backtrace (at
most one every 10 seconds), hopefully allowing you to see which
drivers need work. Fixing all these problems is a prerequisite
for turning on USE_HPPA_IOREMAP. The warnings are harmless;
the kernel has enough information to fix the broken drivers
automatically, but we'd like to make it more efficient by not
having to do that.