CONFIG_COMMAND_LINE_SIZE is not available for thedefaultarchitecture x86.
Result is shown for architecture s390
Maximum size of kernel command line
configname: CONFIG_COMMAND_LINE_SIZE
Linux Kernel Configuration
└─>Processor type and features
└─>Maximum size of kernel command line
In linux kernel since version 5.2 (release Date: 2019-07-07)
This allows you to specify the maximum length of the kernel command
line.
line.