Está descrito no nível superior Makefile
.
Por exemplo, daqui ,
VERSION = 4
PATCHLEVEL = 5
SUBLEVEL = 0
EXTRAVERSION = -rc6
NAME = Blurry Fish Butt
# *DOCUMENTATION*
# To see a list of typical targets execute "make help"
# More info can be located in ./README
# Comments in this file are targeted only to the developer, do not
# expect to learn how to build the kernel reading this file.