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hello.c

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/*

Hello world module.

dmesg -c

insmod hello.ko

dmesg -c | grep 'hello init'

rmmod hello.ko

dmesg -c | grep 'hello cleanup'

*/

#include <linux/module.h>

#include <linux/kernel.h>

int init_module(void)

{

printk(KERN_INFO "hello init\n");

return 0;

}

void cleanup_module(void)

{

printk(KERN_INFO "hello cleanup\n");

}