How do I compile a Linux kernel module?
You have to write a Makefile. The Makefile is a standard one and depends on the kernel version.
Standard Makefile for 2.6 kernels
obj-m := name_of_module.o all: make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules clean: make -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean
Standard Makefile for 2.4 (and <=) kernels
TARGET := module_name INCLUDE := -I/lib/modules/`uname -r`/build/include CFLAGS := -O2 -Wall -DMODULE -D__KERNEL__ -DLINUX CC := gcc ${TARGET}.o: ${TARGET}.c $(CC) $(CFLAGS) ${INCLUDE} -c ${TARGET}.c
Once the module is compiled, you can load it with the following command :
insmod module.[ko|o]