顺序锁seqlock_t简单用法

#include <linux/module.h>
#include <linux/init.h>
#include <linux/seqlock.h>

static int __init sky_init(void)
{
        seqlock_t seqlock;
        unsigned seqnum;

        seqlock_init(&seqlock);
        do {
                seqnum = read_seqbegin(&seqlock);

                printk(KERN_ALERT "this is a test\n");

        } while (read_seqretry(&seqlock, seqnum));
                        
        return 0;
}

static void __exit sky_exit(void)
{
        return;
}

MODULE_LICENSE("GPL");

module_init(sky_init);
module_exit(sky_exit);