c - Linux timer_setup 函数

Question

当我尝试调用 timer_setup() 函数时出现以下错误

 error: passing argument 2 of ‘init_timer_key’ from incompatible pointer type   [-Werror=incompatible-pointer-types]
  init_timer_key((_timer), (_fn), (_flags), NULL, NULL)

代码:

/* ... */
#include <linux/timer.h>

static struct timer_list my_timer;

void my_timer_callback(unsigned long data)
{
    pr_info("%s called (%ld).\n", __FUNCTION__, jiffies);
}

static int __init my_init(void)
{
    timer_setup(&my_timer, my_timer_callback, 0);
    return 0;
}

static void my_exit(void)
{
    return;
}

module_init(my_init);
module_exit(my_exit);
/* ... */

如何修复错误？

Answer 1

我想，你想使用setup_timer()，而不是timer_setup()，它的原型(prototype)是

static inline void timer_setup(struct timer_list *timer,
                               void (*callback)(struct timer_list *),
                               unsigned int flags)

或将您的计时器功能更改为

void my_timer_callback(struct timer_list  *timer)
{
...
}