#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/spinlock.h>

static DEFINE_SPINLOCK(lock);

void spin_lock_recursion(void* info) {
    unsigned long flags;
    spin_lock_irqsave(&lock, flags);
    spin_lock_irqsave(&lock, flags);
}
static int __init init(void) {
    on_each_cpu(spin_lock_recursion , NULL, NULL);
    return 0;
}

module_init(init);
MODULE_LICENSE("GPL");