kthread_create/kthread_stop 用法

#include <linux/module.h>
#include <linux/init.h>
#include <asm/atomic.h>
#include <linux/kthread.h>
#include <linux/delay.h>

#define err(msg) printk(KERN_ALERT "%s\n", msg)

static struct task_struct *task;

static int kthread_func(void *data)
{
        while (1) {

                if (kthread_should_stop())
                        break;

                printk(KERN_ALERT "kthread_func.\n");
                msleep(1000);
        }

        return 0;
}

static int maininit(void)
{
        if ((task = kthread_create(kthread_func, NULL, "tmp%d", 0)) == NULL) {
                err("kthread_create");
                goto err;
        }

        wake_up_process(task);

        return 0;
err:
        return -1;
}

static void mainexit(void)
{
        kthread_stop(task);
}

module_init(maininit);
module_exit(mainexit);

MODULE_LICENSE("GPL");