c - Linux模块编译: struct evdev member not found

Question

所以，我正在尝试修改 evdev.c，它是 Linux 上鼠标等输入设备的事件处理程序驱动程序。

我遇到的问题是，当我尝试编译模块时，出现大量错误，提示无法找到 evdev 的成员。

/home/mousedev_dbl.c:215: error: ‘struct evdev’ has no member named ‘client_lock’
/home/mousedev_dbl.c:216: error: ‘struct evdev’ has no member named ‘client_list’
/hom/mousedev_dbl.c:217: error: ‘struct evdev’ has no member named ‘client_lock’
/home/mousedev_dbl.c: In function ‘evdev_detach_client’:
/home/mousedev_dbl.c:224: error: ‘struct evdev’ has no member named ‘client_lock’
/home/mousedev_dbl.c:226: error: ‘struct evdev’ has no member named ‘client_lock’
/home/mousedev_dbl.c: In function ‘evdev_open_device’:
/home/mousedev_dbl.c:234: error: ‘struct evdev’ has no member named ‘mutex’
/home/mousedev_dbl.c:238: error: ‘struct evdev’ has no member named ‘exist’

这只是错误的一小部分。

evdev 的结构清楚地存在于我正在编译的 mousedev_dbl.c 文件中。

struct evdev {
      int open;
      int minor;
      struct input_handle handle;
      wait_queue_head_t wait;
      struct evdev_client __rcu *grab;
      struct list_head client_list;
      spinlock_t client_lock; /* protects client_list */
      struct mutex mutex;
      struct device dev;
      bool exist;
};

作为示例，以下是第 215 行的使用方式。

spin_lock(&evdev->client_lock);
list_add_tail_rcu(&client->node, &evdev->client_list);
spin_unlock(&evdev->client_lock);
synchronize_rcu();

什么会导致这些错误？整个文件可以在这里找到: http://lxr.free-electrons.com/source/drivers/input/evdev.c

Answer 1

struct evdev_client __rcu *grab;

此声明有效吗？ (对我来说看起来不像，除非 __rcu 用于预处理器)。

似乎这个声明使 struct evdev 的其余部分呈现乱码。这可以解释编译器没有识别 client_list、client_lock 等。