What does m mean in kernel configuration file?

Question

CONFIG_UNIX=m

I know what y and n stand for,but what about m?

Answer 1

y  =  yes (always installed)
m  =  loadable module (can install and uninstall as you wish)
n  =  no (never installed)

see: https://www.linuxquestions.org/questions/linux-general-1/boot-config%2A-273853/