LINUX内核数据结构kfifo使用

#include <linux/kfifo.h>#define ELEM 16static struct kfifo *q;static spinlock_t q_lock;int num;spin_lock_init(&q_lock);q = kfifo_alloc(sizeof(int)*ELEM, GFP_KERNEL, &q_lock);if (IS_ERR(q)) {    goto err_all_q;}kfifo_put(q, (unsigned char*)&num, sizeof(num));if(kfifo_get(q, (unsigned char*)&num, sizeof(num)) != sizeof(num)) {    goto err_buf;}kfifo_free(q);