Helloworld

//Hello.c

#include
#include
MODULE_LICENSE("Dual BSD/GPL");
static int hello_init(void)
{
printk(KERN_ALERT "Hello world!\n");
return 0;
}
static void hello_exit(void)
{
printk(KERN_ALERT "Goodbye!\n");
}
module_init(hello_init);
module_exit(hello_exit);

 

//Makefile

ifneq ($(KERNEL|RELEASE),)
 obj-m:=hello.o
else
 obj-m:=hello.o
 KERNELDIR ?= /lib/modules/$(shell uname -r)/build
 PWD:=$(shell pwd)

default:
 $(MAKE) -C $(KERNELDIR) M=$(PWD) modules

.PHONY:clean
clean:
 rm deit $(objects)
endif

 

/////

insmod hello.ko

lsmod | grep hello

rmmod hello