install

apt -y install linux-headers-$(uname -r)-amd64
apt -y install bear

build

bear -- make

browser

open hk with vscode(clangd installed)

test

make
sudo insmod hk.ko
sudo rmmod hk.ko
sudo dmesg

check

[ 2291.214633] Hello, World!
[ 2301.208863] Goodbye, World!
[ 4728.722528] Hello, World!
[ 4745.282799] Goodbye, World!