https://github.com/cirosantilli/linux-kernel-module-cheat#rootfs_overlay

. link:hello.c[]
. link:hello_cpp.cpp[]
. link:sched_getaffinity.c[]
. link:usermem.c[]
.. link:pagemap_dump.c[]
. inits
... link:sleep_forever.c[]
... link:poweroff.c[]
... link:init_dev_kmsg.c[]
. link:uio_read.c[]
. link:rand_check.c[]
. x86_64
.. link:rdtsc.c[]
