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#include <linux/init.h>

#include <linux/module.h>

static char *p_name = "Usr";

module_param(p_name, charp, S_IRUGO);

MODULE_PARM_DESC(p_name, "This is a char * string.");

static int __init hi_init(void)

{

  printk(KERN_INFO "Hi enter %s\n",p_name);

  return 0;

}

module_init(hi_init);

static void __exit hi_exit(void)

{

  printk(KERN_INFO "Hi exit %s\n ",p_name);

}

module_exit(hi_exit);

MODULE_AUTHOR(" libra13179 ");

MODULE_LICENSE("GPL v2");

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KVERS = $(shell uname -r)

# Kernel modules

obj-m += hi.o

# Specify flags for the module compilation.

#EXTRA_CFLAGS=-g -O0

build: kernel_modules

kernel_modules:

  make -C /lib/modules/$(KVERS)/build M=$(CURDIR) modules

#  @echo $(KVERS)

clean:

  make -C /lib/modules/$(KVERS)/build M=$(CURDIR) clean

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root@lin-virtual-machine:/home/lin/hi# insmod ./hi.ko

root@lin-virtual-machine:/home/lin/hi# cat /var/log/syslog | grep Hi

...

Jul 25 15:11:38 lin-virtual-machine kernel: [ 203.238178] Hi enter Usr

...