Kernel thread sample source

참조:http://www.programering.com/a/MDN4IjMwATk.html


#include
#include
#ifndef SLEEP_MILLI_SEC
#define SLEEP_MILLI_SEC(nMilliSec)\
do { \
long timeout = (nMilliSec) * HZ / 1000; \
while(timeout > 0) \
{ \
timeout = schedule_timeout(timeout); \
} \
}while(0);
#endif

static struct task_struct * MyThread = NULL;

static int MyPrintk(void *data)
{
    char *mydata = kmalloc(strlen(data)+1,GFP_KERNEL);
    memset(mydata,'\0',strlen(data)+1);
    strncpy(mydata,data,strlen(data));
    while(!kthread_should_stop())
    {
        SLEEP_MILLI_SEC(1000);
        printk("%s\n",mydata);
    }
    kfree(mydata);
    return 0;
}

static int __init init_kthread(void)
{
    MyThread = kthread_run(MyPrintk,"hello world","mythread");
    return 0;
}

static void __exit exit_kthread(void)
{
    if(MyThread)
    {
        printk("stop MyThread\n");
        kthread_stop(MyThread);
    }
}
module_init(init_kthread);
module_exit(exit_kthread);