build runs, lots of uncommented and lots of untested though

Refactor everything. Create nice submodules/ and packages/ folders.

hello_host_kernel_module/Makefile

@@ -0,0 +1,12 @@
+obj-m += hello.o
+ccflags-y := -Wno-declaration-after-statement -std=gnu99
+
+.PHONY: all clean
+
+all: hello.ko
+
+hello.ko: hello.c
+	$(MAKE) -C '/lib/modules/$(shell uname -r)/build' M='$(PWD)' modules
+
+clean:
+	$(MAKE) -C '/lib/modules/$(shell uname -r)/build' M='$(PWD)' clean

hello_host_kernel_module/hello.c

@@ -0,0 +1,17 @@
+#include <linux/module.h>
+#include <linux/kernel.h>
+
+static int myinit(void)
+{
+	pr_info("hello init\n");
+	return 0;
+}
+
+static void myexit(void)
+{
+	pr_info("hello exit\n");
+}
+
+module_init(myinit)
+module_exit(myexit)
+MODULE_LICENSE("GPL");