default or selected kernelversion does not have config value CONFIG_CTC.
Result is shown for kernelversion 5.4.123
CTC device support
modulename: ctc.ko
configname: CONFIG_CTC
Linux Kernel Configuration
└─>Networking support
└─>S/390 network device drivers
└─>CTC device support
In linux kernel since version 2.6.12
Select this option if you want to use channel-to-channel networking
on IBM S/390 or zSeries. This device driver supports real CTC
coupling using ESCON. It also supports virtual CTCs when running
under VM. It will use the channel device configuration if this is
available. This option is also available as a module which will be
called ctc.ko. If you do not know what it is, it's safe to say "Y".
on IBM S/390 or zSeries. This device driver supports real CTC
coupling using ESCON. It also supports virtual CTCs when running
under VM. It will use the channel device configuration if this is
available. This option is also available as a module which will be
called ctc.ko. If you do not know what it is, it's safe to say "Y".