void phone_unregister_device(struct phone_device *pfd)
{
mutex_lock(&phone_lock);
- if (phone_device[pfd->minor] != pfd)
- panic("phone: bad unregister");
- phone_device[pfd->minor] = NULL;
+ if (likely(phone_device[pfd->minor] == pfd))
+ phone_device[pfd->minor] = NULL;
mutex_unlock(&phone_lock);
}
-static struct file_operations phone_fops =
+static const struct file_operations phone_fops =
{
.owner = THIS_MODULE,
.open = phone_open,